/export/starexec/sandbox/solver/bin/starexec_run_default /export/starexec/sandbox/benchmark/theBenchmark.c /export/starexec/sandbox/output/output_files -------------------------------------------------------------------------------- Ultimate: Cannot open display: This is Ultimate 0.1.25-34f2e62 [2020-07-01 13:02:06,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 13:02:07,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 13:02:07,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 13:02:07,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 13:02:07,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 13:02:07,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 13:02:07,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 13:02:07,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 13:02:07,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 13:02:07,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 13:02:07,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 13:02:07,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 13:02:07,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 13:02:07,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 13:02:07,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 13:02:07,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 13:02:07,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 13:02:07,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 13:02:07,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 13:02:07,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 13:02:07,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 13:02:07,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 13:02:07,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 13:02:07,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 13:02:07,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 13:02:07,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 13:02:07,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 13:02:07,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 13:02:07,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 13:02:07,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 13:02:07,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 13:02:07,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 13:02:07,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 13:02:07,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 13:02:07,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 13:02:07,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 13:02:07,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 13:02:07,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 13:02:07,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 13:02:07,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 13:02:07,043 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-07-01 13:02:07,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 13:02:07,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 13:02:07,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 13:02:07,059 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 13:02:07,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 13:02:07,059 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 13:02:07,060 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 13:02:07,060 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 13:02:07,060 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 13:02:07,060 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 13:02:07,060 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 13:02:07,060 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 13:02:07,061 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 13:02:07,061 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 13:02:07,061 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 13:02:07,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 13:02:07,061 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 13:02:07,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 13:02:07,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 13:02:07,062 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 13:02:07,062 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 13:02:07,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 13:02:07,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 13:02:07,063 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 13:02:07,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 13:02:07,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 13:02:07,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 13:02:07,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 13:02:07,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 13:02:07,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 13:02:07,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 13:02:07,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 13:02:07,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 13:02:07,248 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 13:02:07,249 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 13:02:07,311 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_T8UPzo/tmp/5df48440102c44f988ad1110613c5c15/FLAG29c9960c3 [2020-07-01 13:02:07,644 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 13:02:07,645 INFO L160 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 13:02:07,646 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 13:02:07,652 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_T8UPzo/tmp/5df48440102c44f988ad1110613c5c15/FLAG29c9960c3 [2020-07-01 13:02:08,043 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/BenchExec_run_T8UPzo/tmp/5df48440102c44f988ad1110613c5c15 [2020-07-01 13:02:08,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 13:02:08,055 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 13:02:08,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 13:02:08,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 13:02:08,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 13:02:08,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a92508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08, skipping insertion in model container [2020-07-01 13:02:08,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 13:02:08,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 13:02:08,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 13:02:08,324 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 13:02:08,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 13:02:08,358 INFO L208 MainTranslator]: Completed translation [2020-07-01 13:02:08,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08 WrapperNode [2020-07-01 13:02:08,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 13:02:08,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 13:02:08,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 13:02:08,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 13:02:08,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 13:02:08,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 13:02:08,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 13:02:08,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 13:02:08,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 13:02:08,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 13:02:08,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 13:02:08,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 13:02:08,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (1/1) ... No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 13:02:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-01 13:02:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 13:02:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 13:02:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 13:02:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-01 13:02:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-01 13:02:08,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 13:02:08,777 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-01 13:02:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:02:08 BoogieIcfgContainer [2020-07-01 13:02:08,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 13:02:08,782 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 13:02:08,782 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 13:02:08,784 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 13:02:08,785 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:02:08" (1/1) ... [2020-07-01 13:02:08,799 INFO L313 BlockEncoder]: Initial Icfg 27 locations, 33 edges [2020-07-01 13:02:08,800 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 13:02:08,801 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 13:02:08,802 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 13:02:08,802 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 13:02:08,804 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 13:02:08,804 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 13:02:08,805 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 13:02:08,839 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 13:02:08,985 INFO L200 BlockEncoder]: SBE split 10 edges [2020-07-01 13:02:08,992 INFO L70 emoveInfeasibleEdges]: Removed 2 edges and 0 locations because of local infeasibility [2020-07-01 13:02:08,994 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 13:02:09,032 INFO L100 BaseMinimizeStates]: Removed 16 edges and 8 locations by large block encoding [2020-07-01 13:02:09,035 INFO L70 RemoveSinkStates]: Removed 4 edges and 2 locations by removing sink states [2020-07-01 13:02:09,037 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 13:02:09,038 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 13:02:09,038 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 13:02:09,038 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 13:02:09,040 INFO L313 BlockEncoder]: Encoded RCFG 17 locations, 333 edges [2020-07-01 13:02:09,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 01:02:09 BasicIcfg [2020-07-01 13:02:09,041 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 13:02:09,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 13:02:09,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 13:02:09,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 13:02:09,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 01:02:08" (1/4) ... [2020-07-01 13:02:09,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a564f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 01:02:09, skipping insertion in model container [2020-07-01 13:02:09,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (2/4) ... [2020-07-01 13:02:09,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a564f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 01:02:09, skipping insertion in model container [2020-07-01 13:02:09,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:02:08" (3/4) ... [2020-07-01 13:02:09,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a564f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 01:02:09, skipping insertion in model container [2020-07-01 13:02:09,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 01:02:09" (4/4) ... [2020-07-01 13:02:09,050 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 13:02:09,061 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 13:02:09,069 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-01 13:02:09,083 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-01 13:02:09,108 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 13:02:09,108 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 13:02:09,108 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 13:02:09,108 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 13:02:09,109 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 13:02:09,109 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 13:02:09,109 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 13:02:09,109 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 13:02:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-01 13:02:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 13:02:09,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:09,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:09,134 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1857582680, now seen corresponding path program 1 times [2020-07-01 13:02:09,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:09,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706818063] [2020-07-01 13:02:09,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:09,243 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:09,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422162199] [2020-07-01 13:02:09,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:09,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 13:02:09,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:09,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706818063] [2020-07-01 13:02:09,345 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:09,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422162199] [2020-07-01 13:02:09,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:09,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 13:02:09,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794032023] [2020-07-01 13:02:09,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 13:02:09,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:02:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:09,370 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-01 13:02:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:10,084 INFO L93 Difference]: Finished difference Result 29 states and 656 transitions. [2020-07-01 13:02:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:02:10,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 13:02:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:10,099 INFO L225 Difference]: With dead ends: 29 [2020-07-01 13:02:10,099 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 13:02:10,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 13:02:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 13:02:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 13:02:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 72 transitions. [2020-07-01 13:02:10,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 72 transitions. Word has length 8 [2020-07-01 13:02:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:10,145 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 72 transitions. [2020-07-01 13:02:10,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 13:02:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 72 transitions. [2020-07-01 13:02:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 13:02:10,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:10,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:10,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-01 13:02:10,349 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:10,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1857642262, now seen corresponding path program 1 times [2020-07-01 13:02:10,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:10,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943434694] [2020-07-01 13:02:10,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:10,357 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:10,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144024977] [2020-07-01 13:02:10,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:10,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 13:02:10,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:10,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943434694] [2020-07-01 13:02:10,399 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:10,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144024977] [2020-07-01 13:02:10,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:10,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 13:02:10,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537975134] [2020-07-01 13:02:10,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 13:02:10,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:02:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:10,402 INFO L87 Difference]: Start difference. First operand 17 states and 72 transitions. Second operand 3 states. [2020-07-01 13:02:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:10,512 INFO L93 Difference]: Finished difference Result 28 states and 121 transitions. [2020-07-01 13:02:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:02:10,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 13:02:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:10,514 INFO L225 Difference]: With dead ends: 28 [2020-07-01 13:02:10,514 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 13:02:10,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 13:02:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 13:02:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 13:02:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 68 transitions. [2020-07-01 13:02:10,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 68 transitions. Word has length 8 [2020-07-01 13:02:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:10,520 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 68 transitions. [2020-07-01 13:02:10,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 13:02:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 68 transitions. [2020-07-01 13:02:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 13:02:10,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:10,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:10,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:10,722 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1857641301, now seen corresponding path program 1 times [2020-07-01 13:02:10,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:10,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522369320] [2020-07-01 13:02:10,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:10,729 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:10,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142505910] [2020-07-01 13:02:10,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:10,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 13:02:10,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:10,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522369320] [2020-07-01 13:02:10,774 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:10,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142505910] [2020-07-01 13:02:10,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:10,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 13:02:10,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818979627] [2020-07-01 13:02:10,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 13:02:10,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:10,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:02:10,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:10,776 INFO L87 Difference]: Start difference. First operand 17 states and 68 transitions. Second operand 3 states. [2020-07-01 13:02:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:10,877 INFO L93 Difference]: Finished difference Result 28 states and 117 transitions. [2020-07-01 13:02:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:02:10,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 13:02:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:10,879 INFO L225 Difference]: With dead ends: 28 [2020-07-01 13:02:10,879 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 13:02:10,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 13:02:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 13:02:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 13:02:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 61 transitions. [2020-07-01 13:02:10,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 61 transitions. Word has length 8 [2020-07-01 13:02:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:10,884 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 61 transitions. [2020-07-01 13:02:10,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 13:02:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 61 transitions. [2020-07-01 13:02:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 13:02:10,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:10,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:11,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:11,086 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1857639379, now seen corresponding path program 1 times [2020-07-01 13:02:11,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:11,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584436882] [2020-07-01 13:02:11,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:11,093 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:11,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916278254] [2020-07-01 13:02:11,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:11,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 13:02:11,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:11,175 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-01 13:02:11,176 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-01 13:02:11,176 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:11,181 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:11,182 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-01 13:02:11,183 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-07-01 13:02:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:11,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584436882] [2020-07-01 13:02:11,194 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:11,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916278254] [2020-07-01 13:02:11,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:11,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 13:02:11,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282630426] [2020-07-01 13:02:11,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 13:02:11,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:02:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:11,196 INFO L87 Difference]: Start difference. First operand 17 states and 61 transitions. Second operand 3 states. [2020-07-01 13:02:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:11,281 INFO L93 Difference]: Finished difference Result 17 states and 61 transitions. [2020-07-01 13:02:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:02:11,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 13:02:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:11,282 INFO L225 Difference]: With dead ends: 17 [2020-07-01 13:02:11,282 INFO L226 Difference]: Without dead ends: 15 [2020-07-01 13:02:11,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-01 13:02:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-01 13:02:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-01 13:02:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 57 transitions. [2020-07-01 13:02:11,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 57 transitions. Word has length 8 [2020-07-01 13:02:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:11,287 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 57 transitions. [2020-07-01 13:02:11,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 13:02:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 57 transitions. [2020-07-01 13:02:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 13:02:11,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:11,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:11,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:11,489 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1857639377, now seen corresponding path program 1 times [2020-07-01 13:02:11,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:11,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425658575] [2020-07-01 13:02:11,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:11,495 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:11,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059974603] [2020-07-01 13:02:11,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:11,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-01 13:02:11,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:11,550 INFO L435 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2020-07-01 13:02:11,557 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-07-01 13:02:11,559 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2020-07-01 13:02:11,559 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:11,572 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:11,582 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-01 13:02:11,583 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:11,601 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:11,613 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-01 13:02:11,613 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:30, output treesize:35 [2020-07-01 13:02:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:11,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425658575] [2020-07-01 13:02:11,679 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:11,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059974603] [2020-07-01 13:02:11,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:11,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 13:02:11,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372630956] [2020-07-01 13:02:11,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 13:02:11,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 13:02:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:11,681 INFO L87 Difference]: Start difference. First operand 15 states and 57 transitions. Second operand 5 states. [2020-07-01 13:02:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:11,918 INFO L93 Difference]: Finished difference Result 28 states and 103 transitions. [2020-07-01 13:02:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 13:02:11,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-07-01 13:02:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:11,919 INFO L225 Difference]: With dead ends: 28 [2020-07-01 13:02:11,919 INFO L226 Difference]: Without dead ends: 19 [2020-07-01 13:02:11,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-01 13:02:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-01 13:02:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-07-01 13:02:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 13:02:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 36 transitions. [2020-07-01 13:02:11,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 36 transitions. Word has length 8 [2020-07-01 13:02:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:11,926 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 36 transitions. [2020-07-01 13:02:11,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 13:02:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 36 transitions. [2020-07-01 13:02:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 13:02:11,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:11,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:12,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:12,128 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:12,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1857639376, now seen corresponding path program 1 times [2020-07-01 13:02:12,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:12,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850680229] [2020-07-01 13:02:12,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:12,134 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:12,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669674727] [2020-07-01 13:02:12,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:12,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 13:02:12,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:12,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850680229] [2020-07-01 13:02:12,174 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:12,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669674727] [2020-07-01 13:02:12,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:12,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 13:02:12,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227171451] [2020-07-01 13:02:12,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 13:02:12,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 13:02:12,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:12,176 INFO L87 Difference]: Start difference. First operand 17 states and 36 transitions. Second operand 4 states. [2020-07-01 13:02:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:12,220 INFO L93 Difference]: Finished difference Result 19 states and 36 transitions. [2020-07-01 13:02:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 13:02:12,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-07-01 13:02:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:12,221 INFO L225 Difference]: With dead ends: 19 [2020-07-01 13:02:12,222 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 13:02:12,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 13:02:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 13:02:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 13:02:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 33 transitions. [2020-07-01 13:02:12,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 33 transitions. Word has length 8 [2020-07-01 13:02:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:12,227 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 33 transitions. [2020-07-01 13:02:12,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 13:02:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 33 transitions. [2020-07-01 13:02:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-01 13:02:12,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:12,228 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:12,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:12,429 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1515249031, now seen corresponding path program 1 times [2020-07-01 13:02:12,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:12,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694442655] [2020-07-01 13:02:12,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:12,435 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:12,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495202097] [2020-07-01 13:02:12,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:12,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 13:02:12,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:12,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694442655] [2020-07-01 13:02:12,485 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:12,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495202097] [2020-07-01 13:02:12,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:12,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-01 13:02:12,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948020781] [2020-07-01 13:02:12,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 13:02:12,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:12,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 13:02:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:12,487 INFO L87 Difference]: Start difference. First operand 17 states and 33 transitions. Second operand 5 states. [2020-07-01 13:02:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:12,598 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2020-07-01 13:02:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 13:02:12,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-01 13:02:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:12,599 INFO L225 Difference]: With dead ends: 39 [2020-07-01 13:02:12,599 INFO L226 Difference]: Without dead ends: 30 [2020-07-01 13:02:12,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-01 13:02:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-07-01 13:02:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-01 13:02:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 46 transitions. [2020-07-01 13:02:12,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 46 transitions. Word has length 10 [2020-07-01 13:02:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:12,607 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 46 transitions. [2020-07-01 13:02:12,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 13:02:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 46 transitions. [2020-07-01 13:02:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-01 13:02:12,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:12,607 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:12,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:12,808 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash -488718937, now seen corresponding path program 1 times [2020-07-01 13:02:12,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:12,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711122936] [2020-07-01 13:02:12,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:12,815 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:12,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165781749] [2020-07-01 13:02:12,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:12,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-01 13:02:12,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:12,855 INFO L435 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_28|]} [2020-07-01 13:02:12,860 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-07-01 13:02:12,861 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2020-07-01 13:02:12,861 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:12,870 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:12,876 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-01 13:02:12,877 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:12,885 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:12,887 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-01 13:02:12,888 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:24 [2020-07-01 13:02:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-01 13:02:12,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711122936] [2020-07-01 13:02:12,943 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:12,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165781749] [2020-07-01 13:02:12,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-01 13:02:12,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-07-01 13:02:12,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110178497] [2020-07-01 13:02:12,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 13:02:12,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:12,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 13:02:12,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:12,945 INFO L87 Difference]: Start difference. First operand 24 states and 46 transitions. Second operand 4 states. [2020-07-01 13:02:33,276 WARN L192 SmtUtils]: Spent 20.28 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-01 13:02:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:33,453 INFO L93 Difference]: Finished difference Result 24 states and 46 transitions. [2020-07-01 13:02:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 13:02:33,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-01 13:02:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:33,454 INFO L225 Difference]: With dead ends: 24 [2020-07-01 13:02:33,455 INFO L226 Difference]: Without dead ends: 23 [2020-07-01 13:02:33,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-01 13:02:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-07-01 13:02:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-01 13:02:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 44 transitions. [2020-07-01 13:02:33,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 44 transitions. Word has length 10 [2020-07-01 13:02:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:33,462 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 44 transitions. [2020-07-01 13:02:33,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 13:02:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 44 transitions. [2020-07-01 13:02:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-01 13:02:33,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:33,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:33,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-01 13:02:33,664 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash -271592998, now seen corresponding path program 1 times [2020-07-01 13:02:33,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:33,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605524086] [2020-07-01 13:02:33,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:33,670 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:33,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060243200] [2020-07-01 13:02:33,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:33,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 13:02:33,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-01 13:02:33,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605524086] [2020-07-01 13:02:33,713 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:33,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060243200] [2020-07-01 13:02:33,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:33,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 13:02:33,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354737915] [2020-07-01 13:02:33,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 13:02:33,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 13:02:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:33,715 INFO L87 Difference]: Start difference. First operand 22 states and 44 transitions. Second operand 4 states. [2020-07-01 13:02:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:33,763 INFO L93 Difference]: Finished difference Result 23 states and 44 transitions. [2020-07-01 13:02:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 13:02:33,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-01 13:02:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:33,764 INFO L225 Difference]: With dead ends: 23 [2020-07-01 13:02:33,764 INFO L226 Difference]: Without dead ends: 22 [2020-07-01 13:02:33,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-01 13:02:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-01 13:02:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-01 13:02:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 41 transitions. [2020-07-01 13:02:33,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 41 transitions. Word has length 11 [2020-07-01 13:02:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:33,771 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 41 transitions. [2020-07-01 13:02:33,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 13:02:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 41 transitions. [2020-07-01 13:02:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-01 13:02:33,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:33,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:33,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:33,973 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash -271592972, now seen corresponding path program 1 times [2020-07-01 13:02:33,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:33,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166633012] [2020-07-01 13:02:33,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:33,980 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:33,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346783886] [2020-07-01 13:02:33,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:34,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-01 13:02:34,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:34,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166633012] [2020-07-01 13:02:34,048 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:34,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346783886] [2020-07-01 13:02:34,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-01 13:02:34,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-07-01 13:02:34,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036711545] [2020-07-01 13:02:34,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 13:02:34,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 13:02:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:34,050 INFO L87 Difference]: Start difference. First operand 22 states and 41 transitions. Second operand 5 states. [2020-07-01 13:02:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:34,227 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-07-01 13:02:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 13:02:34,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-01 13:02:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:34,228 INFO L225 Difference]: With dead ends: 28 [2020-07-01 13:02:34,229 INFO L226 Difference]: Without dead ends: 27 [2020-07-01 13:02:34,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-01 13:02:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-01 13:02:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-01 13:02:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-01 13:02:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 51 transitions. [2020-07-01 13:02:34,236 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 51 transitions. Word has length 11 [2020-07-01 13:02:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:34,237 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 51 transitions. [2020-07-01 13:02:34,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 13:02:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 51 transitions. [2020-07-01 13:02:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-01 13:02:34,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:34,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:34,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:34,439 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2029909460, now seen corresponding path program 1 times [2020-07-01 13:02:34,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:34,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828356889] [2020-07-01 13:02:34,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:34,444 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:34,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914488145] [2020-07-01 13:02:34,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:34,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-01 13:02:34,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:34,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828356889] [2020-07-01 13:02:34,513 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:34,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914488145] [2020-07-01 13:02:34,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:34,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 13:02:34,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561063265] [2020-07-01 13:02:34,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 13:02:34,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 13:02:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:34,515 INFO L87 Difference]: Start difference. First operand 25 states and 51 transitions. Second operand 5 states. [2020-07-01 13:02:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:34,603 INFO L93 Difference]: Finished difference Result 26 states and 52 transitions. [2020-07-01 13:02:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 13:02:34,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-01 13:02:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:34,604 INFO L225 Difference]: With dead ends: 26 [2020-07-01 13:02:34,604 INFO L226 Difference]: Without dead ends: 25 [2020-07-01 13:02:34,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:34,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-01 13:02:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-07-01 13:02:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-01 13:02:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 40 transitions. [2020-07-01 13:02:34,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 40 transitions. Word has length 11 [2020-07-01 13:02:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:34,612 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 40 transitions. [2020-07-01 13:02:34,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 13:02:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 40 transitions. [2020-07-01 13:02:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-01 13:02:34,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:34,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:34,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-01 13:02:34,814 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:34,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash 170547653, now seen corresponding path program 1 times [2020-07-01 13:02:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:34,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724421810] [2020-07-01 13:02:34,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:34,819 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:34,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742403281] [2020-07-01 13:02:34,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:34,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-01 13:02:34,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:34,899 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:34,899 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 35 [2020-07-01 13:02:34,900 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:34,923 INFO L619 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-07-01 13:02:34,924 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-01 13:02:34,924 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:13 [2020-07-01 13:02:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-01 13:02:34,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724421810] [2020-07-01 13:02:34,959 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:34,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742403281] [2020-07-01 13:02:34,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:34,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 13:02:34,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207102900] [2020-07-01 13:02:34,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 13:02:34,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 13:02:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:34,961 INFO L87 Difference]: Start difference. First operand 21 states and 40 transitions. Second operand 4 states. [2020-07-01 13:02:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:35,183 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2020-07-01 13:02:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 13:02:35,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-01 13:02:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:35,185 INFO L225 Difference]: With dead ends: 32 [2020-07-01 13:02:35,185 INFO L226 Difference]: Without dead ends: 21 [2020-07-01 13:02:35,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:02:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-01 13:02:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-01 13:02:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-01 13:02:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2020-07-01 13:02:35,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 12 [2020-07-01 13:02:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:35,204 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2020-07-01 13:02:35,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 13:02:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2020-07-01 13:02:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-01 13:02:35,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:35,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:35,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:35,405 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash 170547654, now seen corresponding path program 1 times [2020-07-01 13:02:35,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:35,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874423361] [2020-07-01 13:02:35,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:35,411 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:35,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028038198] [2020-07-01 13:02:35,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:35,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 13:02:35,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-01 13:02:35,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874423361] [2020-07-01 13:02:35,459 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:35,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028038198] [2020-07-01 13:02:35,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:35,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 13:02:35,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685721157] [2020-07-01 13:02:35,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 13:02:35,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 13:02:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:35,461 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand 4 states. [2020-07-01 13:02:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:35,500 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2020-07-01 13:02:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 13:02:35,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-01 13:02:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:35,501 INFO L225 Difference]: With dead ends: 31 [2020-07-01 13:02:35,501 INFO L226 Difference]: Without dead ends: 20 [2020-07-01 13:02:35,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:02:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-01 13:02:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-01 13:02:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-01 13:02:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 30 transitions. [2020-07-01 13:02:35,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 30 transitions. Word has length 12 [2020-07-01 13:02:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:35,508 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 30 transitions. [2020-07-01 13:02:35,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 13:02:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 30 transitions. [2020-07-01 13:02:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-01 13:02:35,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:02:35,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:02:35,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-01 13:02:35,710 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 13:02:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:35,710 INFO L82 PathProgramCache]: Analyzing trace with hash 170547651, now seen corresponding path program 1 times [2020-07-01 13:02:35,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:35,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120396978] [2020-07-01 13:02:35,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:35,715 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:35,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13738129] [2020-07-01 13:02:35,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:35,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 13:02:35,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:35,762 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-01 13:02:35,763 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-01 13:02:35,763 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 13:02:35,767 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 13:02:35,768 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-01 13:02:35,768 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-07-01 13:02:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-01 13:02:35,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120396978] [2020-07-01 13:02:35,776 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:35,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13738129] [2020-07-01 13:02:35,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:35,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 13:02:35,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637831814] [2020-07-01 13:02:35,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 13:02:35,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:02:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:35,777 INFO L87 Difference]: Start difference. First operand 20 states and 30 transitions. Second operand 3 states. [2020-07-01 13:02:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:35,806 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2020-07-01 13:02:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:02:35,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-01 13:02:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:02:35,807 INFO L225 Difference]: With dead ends: 20 [2020-07-01 13:02:35,807 INFO L226 Difference]: Without dead ends: 0 [2020-07-01 13:02:35,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-01 13:02:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-01 13:02:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-01 13:02:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-01 13:02:35,808 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-01 13:02:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:02:35,808 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-01 13:02:35,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 13:02:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-01 13:02:35,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-01 13:02:36,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:36,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-01 13:02:47,101 WARN L192 SmtUtils]: Spent 11.01 s on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-07-01 13:02:52,597 WARN L192 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-07-01 13:02:52,601 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-01 13:02:52,601 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-07-01 13:02:52,601 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (let ((.cse0 (select |#length| ULTIMATE.start_main_~arr~0.base))) (and (<= ULTIMATE.start_main_~arr2~0.offset 0) (exists ((|ULTIMATE.start_main_#t~malloc3.base| Int) (ULTIMATE.start_main_~fac~0 Int)) (and (= (* (* ULTIMATE.start_main_~fac~0 ULTIMATE.start_main_~length~0) 4) (select |#length| |ULTIMATE.start_main_#t~malloc3.base|)) (not (= ULTIMATE.start_main_~arr~0.base |ULTIMATE.start_main_#t~malloc3.base|)))) (<= ULTIMATE.start_main_~i~0 (+ (div (+ (* ULTIMATE.start_main_~arr~0.offset (- 1)) .cse0 (- 4)) 4) 1)) (= 1 (select |#valid| ULTIMATE.start_main_~arr~0.base)) (<= 1 (div .cse0 4)) (= (* ULTIMATE.start_main_~length~0 4) .cse0) (<= 0 ULTIMATE.start_main_~arr~0.offset) (<= ULTIMATE.start_main_~arr~0.offset 0) (<= 1 ULTIMATE.start_main_~arr2~0.base) (< 0 |#StackHeapBarrier|) (<= 0 ULTIMATE.start_main_~i~0) (= 1 (select |#valid| ULTIMATE.start_main_~arr2~0.base)) (= (* (* ULTIMATE.start_main_~fac~0 ULTIMATE.start_main_~length~0) 4) (select |#length| ULTIMATE.start_main_~arr2~0.base)) (<= 0 ULTIMATE.start_main_~arr2~0.offset))) [2020-07-01 13:02:52,602 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-01 13:02:52,602 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-01 13:02:52,602 INFO L268 CegarLoopResult]: For program point L9-2(line 9) no Hoare annotation was computed. [2020-07-01 13:02:52,602 INFO L268 CegarLoopResult]: For program point L7-2(line 7) no Hoare annotation was computed. [2020-07-01 13:02:52,602 INFO L268 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-07-01 13:02:52,602 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-07-01 13:02:52,602 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 18) the Hoare annotation is: (let ((.cse0 (select |#length| ULTIMATE.start_main_~arr~0.base))) (and (<= 0 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~arr2~0.offset 0) (exists ((|ULTIMATE.start_main_#t~malloc3.base| Int) (ULTIMATE.start_main_~fac~0 Int)) (and (= (* (* ULTIMATE.start_main_~fac~0 ULTIMATE.start_main_~length~0) 4) (select |#length| |ULTIMATE.start_main_#t~malloc3.base|)) (not (= ULTIMATE.start_main_~arr~0.base |ULTIMATE.start_main_#t~malloc3.base|)))) (<= ULTIMATE.start_main_~i~0 (+ (div (+ (* ULTIMATE.start_main_~arr~0.offset (- 1)) .cse0 (- 4)) 4) 1)) (= 1 (select |#valid| ULTIMATE.start_main_~arr~0.base)) (<= 1 (div .cse0 4)) (= (* ULTIMATE.start_main_~length~0 4) .cse0) (<= 0 ULTIMATE.start_main_~arr~0.offset) (<= ULTIMATE.start_main_~length~0 ULTIMATE.start_main_~i~0) (<= 1 ULTIMATE.start_main_~arr2~0.base) (< 0 |#StackHeapBarrier|) (= 1 (select |#valid| ULTIMATE.start_main_~arr2~0.base)) (= (* (* ULTIMATE.start_main_~fac~0 ULTIMATE.start_main_~length~0) 4) (select |#length| ULTIMATE.start_main_~arr2~0.base)) (<= 0 ULTIMATE.start_main_~arr2~0.offset))) [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr5REQUIRES_VIOLATION(line 17) no Hoare annotation was computed. [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr2REQUIRES_VIOLATION(line 17) no Hoare annotation was computed. [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr1REQUIRES_VIOLATION(line 14) no Hoare annotation was computed. [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr4REQUIRES_VIOLATION(line 17) no Hoare annotation was computed. [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr3REQUIRES_VIOLATION(line 17) no Hoare annotation was computed. [2020-07-01 13:02:52,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.startErr0REQUIRES_VIOLATION(line 14) no Hoare annotation was computed. [2020-07-01 13:02:52,605 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 13:02:52,613 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:52,614 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,614 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,617 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,617 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,618 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,618 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,618 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:52,618 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,624 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:52,625 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,625 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,626 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,626 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,627 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,627 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,627 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:52,627 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,629 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:52,629 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,629 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,630 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,630 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,631 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,631 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,631 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:52,631 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,632 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:52,632 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,632 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:52,633 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,633 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,634 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,634 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,634 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:52,634 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:52,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 01:02:52 BasicIcfg [2020-07-01 13:02:52,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 13:02:52,637 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 13:02:52,637 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 13:02:52,641 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 13:02:52,642 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-01 13:02:52,642 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.07 01:02:08" (1/5) ... [2020-07-01 13:02:52,642 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b4a8fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.07 01:02:52, skipping insertion in model container [2020-07-01 13:02:52,642 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-01 13:02:52,643 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:02:08" (2/5) ... [2020-07-01 13:02:52,643 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b4a8fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.07 01:02:52, skipping insertion in model container [2020-07-01 13:02:52,643 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-01 13:02:52,643 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:02:08" (3/5) ... [2020-07-01 13:02:52,643 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b4a8fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.07 01:02:52, skipping insertion in model container [2020-07-01 13:02:52,643 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-01 13:02:52,643 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 01:02:09" (4/5) ... [2020-07-01 13:02:52,644 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b4a8fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.07 01:02:52, skipping insertion in model container [2020-07-01 13:02:52,644 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-07-01 13:02:52,644 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 01:02:52" (5/5) ... [2020-07-01 13:02:52,645 INFO L371 chiAutomizerObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 13:02:52,666 INFO L356 BuchiCegarLoop]: Interprodecural is true [2020-07-01 13:02:52,666 INFO L357 BuchiCegarLoop]: Hoare is true [2020-07-01 13:02:52,666 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 13:02:52,667 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 13:02:52,667 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 13:02:52,667 INFO L361 BuchiCegarLoop]: Difference is false [2020-07-01 13:02:52,667 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 13:02:52,667 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-07-01 13:02:52,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-07-01 13:02:52,677 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2020-07-01 13:02:52,677 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-07-01 13:02:52,677 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-07-01 13:02:52,682 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-07-01 13:02:52,682 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-07-01 13:02:52,682 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2020-07-01 13:02:52,682 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-07-01 13:02:52,684 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2020-07-01 13:02:52,684 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-07-01 13:02:52,684 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-07-01 13:02:52,685 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-07-01 13:02:52,685 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-07-01 13:02:52,690 INFO L794 eck$LassoCheckResult]: Stem: 15#ULTIMATE.startENTRYtrue [434] ULTIMATE.startENTRY-->L7: Formula: (and (= 0 |v_#NULL.base_2|) (< 0 |v_#StackHeapBarrier_3|) (= 0 |v_#NULL.offset_2|) (= |v_#valid_18| (store |v_#valid_19| 0 0))) InVars {#StackHeapBarrier=|v_#StackHeapBarrier_3|, #valid=|v_#valid_19|} OutVars{ULTIMATE.start_main_#t~nondet0=|v_ULTIMATE.start_main_#t~nondet0_6|, ULTIMATE.start_main_#t~nondet1=|v_ULTIMATE.start_main_#t~nondet1_4|, ULTIMATE.start_main_~arr~0.offset=v_ULTIMATE.start_main_~arr~0.offset_9, ULTIMATE.start_main_#t~nondet5=|v_ULTIMATE.start_main_#t~nondet5_4|, #NULL.offset=|v_#NULL.offset_2|, ULTIMATE.start_main_~i~0=v_ULTIMATE.start_main_~i~0_13, ULTIMATE.start_main_~fac~0=v_ULTIMATE.start_main_~fac~0_9, ULTIMATE.start_main_#t~malloc3.offset=|v_ULTIMATE.start_main_#t~malloc3.offset_7|, ULTIMATE.start_main_#t~post6=|v_ULTIMATE.start_main_#t~post6_4|, ULTIMATE.start_main_~arr2~0.base=v_ULTIMATE.start_main_~arr2~0.base_8, #NULL.base=|v_#NULL.base_2|, ULTIMATE.start_main_#t~post4=|v_ULTIMATE.start_main_#t~post4_4|, ULTIMATE.start_main_~arr2~0.offset=v_ULTIMATE.start_main_~arr2~0.offset_7, #StackHeapBarrier=|v_#StackHeapBarrier_3|, ULTIMATE.start_main_#t~mem7=|v_ULTIMATE.start_main_#t~mem7_5|, ULTIMATE.start_main_~arr~0.base=v_ULTIMATE.start_main_~arr~0.base_11, ULTIMATE.start_main_~j~0=v_ULTIMATE.start_main_~j~0_11, ULTIMATE.start_main_#t~malloc2.base=|v_ULTIMATE.start_main_#t~malloc2.base_7|, ULTIMATE.start_main_#t~malloc2.offset=|v_ULTIMATE.start_main_#t~malloc2.offset_7|, ULTIMATE.start_main_#t~malloc3.base=|v_ULTIMATE.start_main_#t~malloc3.base_7|, ULTIMATE.start_main_#res=|v_ULTIMATE.start_main_#res_5|, #valid=|v_#valid_18|, ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_14} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~nondet0, ULTIMATE.start_main_#t~nondet1, ULTIMATE.start_main_~arr~0.offset, ULTIMATE.start_main_#t~nondet5, #NULL.offset, ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~fac~0, ULTIMATE.start_main_#t~malloc3.offset, ULTIMATE.start_main_#t~post6, ULTIMATE.start_main_~arr2~0.base, #NULL.base, ULTIMATE.start_main_#t~post4, ULTIMATE.start_main_~arr2~0.offset, ULTIMATE.start_main_#t~mem7, ULTIMATE.start_main_~arr~0.base, ULTIMATE.start_main_~j~0, ULTIMATE.start_main_#t~malloc2.base, ULTIMATE.start_main_#t~malloc2.offset, ULTIMATE.start_main_#t~malloc3.base, ULTIMATE.start_main_#res, #valid, ULTIMATE.start_main_~length~0] 8#L7true [97] L7-->L7-2: Formula: (>= v_ULTIMATE.start_main_~length~0_6 1) InVars {ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_6} OutVars{ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_6} AuxVars[] AssignedVars[] 3#L7-2true [64] L7-2-->L9: Formula: (= v_ULTIMATE.start_main_~fac~0_2 |v_ULTIMATE.start_main_#t~nondet1_3|) InVars {ULTIMATE.start_main_#t~nondet1=|v_ULTIMATE.start_main_#t~nondet1_3|} OutVars{ULTIMATE.start_main_#t~nondet1=|v_ULTIMATE.start_main_#t~nondet1_2|, ULTIMATE.start_main_~fac~0=v_ULTIMATE.start_main_~fac~0_2} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~nondet1, ULTIMATE.start_main_~fac~0] 12#L9true [68] L9-->L9-2: Formula: (and (= v_ULTIMATE.start_main_~fac~0_3 1) (< v_ULTIMATE.start_main_~fac~0_4 1)) InVars {ULTIMATE.start_main_~fac~0=v_ULTIMATE.start_main_~fac~0_4} OutVars{ULTIMATE.start_main_~fac~0=v_ULTIMATE.start_main_~fac~0_3} AuxVars[] AssignedVars[ULTIMATE.start_main_~fac~0] 9#L9-2true [111] L9-2-->L12: Formula: (let ((.cse0 (store |v_#valid_5| |v_ULTIMATE.start_main_#t~malloc2.base_2| 1))) (and (< |v_#StackHeapBarrier_2| |v_ULTIMATE.start_main_#t~malloc2.base_2|) (= v_ULTIMATE.start_main_~arr~0.offset_2 |v_ULTIMATE.start_main_#t~malloc2.offset_2|) (= v_ULTIMATE.start_main_~arr2~0.base_2 |v_ULTIMATE.start_main_#t~malloc3.base_2|) (= 0 |v_ULTIMATE.start_main_#t~malloc3.offset_2|) (= |v_#length_1| (store (store |v_#length_3| |v_ULTIMATE.start_main_#t~malloc2.base_2| (* v_ULTIMATE.start_main_~length~0_7 4)) |v_ULTIMATE.start_main_#t~malloc3.base_2| (* (* v_ULTIMATE.start_main_~fac~0_6 v_ULTIMATE.start_main_~length~0_7) 4))) (= 0 (select |v_#valid_5| |v_ULTIMATE.start_main_#t~malloc2.base_2|)) (> 0 |v_ULTIMATE.start_main_#t~malloc3.base_2|) (= (store .cse0 |v_ULTIMATE.start_main_#t~malloc3.base_2| 1) |v_#valid_3|) (= 0 |v_ULTIMATE.start_main_#t~malloc2.offset_2|) (< 0 |v_ULTIMATE.start_main_#t~malloc2.base_2|) (< |v_#StackHeapBarrier_2| |v_ULTIMATE.start_main_#t~malloc3.base_2|) (= 0 (select .cse0 |v_ULTIMATE.start_main_#t~malloc3.base_2|)) (= v_ULTIMATE.start_main_~arr~0.base_2 |v_ULTIMATE.start_main_#t~malloc2.base_2|) (= v_ULTIMATE.start_main_~arr2~0.offset_2 |v_ULTIMATE.start_main_#t~malloc3.offset_2|))) InVars {#StackHeapBarrier=|v_#StackHeapBarrier_2|, #length=|v_#length_3|, ULTIMATE.start_main_~fac~0=v_ULTIMATE.start_main_~fac~0_6, ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_7, #valid=|v_#valid_5|} OutVars{ULTIMATE.start_main_~arr~0.offset=v_ULTIMATE.start_main_~arr~0.offset_2, ULTIMATE.start_main_~fac~0=v_ULTIMATE.start_main_~fac~0_6, ULTIMATE.start_main_#t~malloc3.offset=|v_ULTIMATE.start_main_#t~malloc3.offset_2|, ULTIMATE.start_main_~arr2~0.base=v_ULTIMATE.start_main_~arr2~0.base_2, ULTIMATE.start_main_~arr2~0.offset=v_ULTIMATE.start_main_~arr2~0.offset_2, #StackHeapBarrier=|v_#StackHeapBarrier_2|, ULTIMATE.start_main_~arr~0.base=v_ULTIMATE.start_main_~arr~0.base_2, ULTIMATE.start_main_#t~malloc2.base=|v_ULTIMATE.start_main_#t~malloc2.base_2|, ULTIMATE.start_main_#t~malloc2.offset=|v_ULTIMATE.start_main_#t~malloc2.offset_2|, ULTIMATE.start_main_#t~malloc3.base=|v_ULTIMATE.start_main_#t~malloc3.base_2|, #valid=|v_#valid_3|, #length=|v_#length_1|, ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_7} AuxVars[] AssignedVars[ULTIMATE.start_main_~arr~0.offset, ULTIMATE.start_main_~arr~0.base, ULTIMATE.start_main_#t~malloc2.base, ULTIMATE.start_main_#t~malloc2.offset, ULTIMATE.start_main_#t~malloc3.base, #valid, #length, ULTIMATE.start_main_#t~malloc3.offset, ULTIMATE.start_main_~arr2~0.base, ULTIMATE.start_main_~arr2~0.offset] 17#L12true [127] L12-->L13-3: Formula: (and (= v_ULTIMATE.start_main_~i~0_4 0) (< 0 v_ULTIMATE.start_main_~arr2~0.base_4) (< 0 v_ULTIMATE.start_main_~arr~0.offset_4)) InVars {ULTIMATE.start_main_~arr~0.offset=v_ULTIMATE.start_main_~arr~0.offset_4, ULTIMATE.start_main_~arr2~0.base=v_ULTIMATE.start_main_~arr2~0.base_4} OutVars{ULTIMATE.start_main_~arr~0.offset=v_ULTIMATE.start_main_~arr~0.offset_4, ULTIMATE.start_main_~i~0=v_ULTIMATE.start_main_~i~0_4, ULTIMATE.start_main_~arr2~0.base=v_ULTIMATE.start_main_~arr2~0.base_4} AuxVars[] AssignedVars[ULTIMATE.start_main_~i~0] 14#L13-3true [2020-07-01 13:02:52,690 INFO L796 eck$LassoCheckResult]: Loop: 14#L13-3true [94] L13-3-->L14: Formula: (< v_ULTIMATE.start_main_~i~0_6 v_ULTIMATE.start_main_~length~0_9) InVars {ULTIMATE.start_main_~i~0=v_ULTIMATE.start_main_~i~0_6, ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_9} OutVars{ULTIMATE.start_main_~i~0=v_ULTIMATE.start_main_~i~0_6, ULTIMATE.start_main_~length~0=v_ULTIMATE.start_main_~length~0_9} AuxVars[] AssignedVars[] 19#L14true [438] L14-->L13-3: Formula: (let ((.cse0 (* 4 v_ULTIMATE.start_main_~i~0_17))) (and (<= (+ .cse0 v_ULTIMATE.start_main_~arr~0.offset_11 4) (select |v_#length_11| v_ULTIMATE.start_main_~arr~0.base_13)) (<= 0 (+ .cse0 v_ULTIMATE.start_main_~arr~0.offset_11)) (= (+ v_ULTIMATE.start_main_~i~0_17 1) v_ULTIMATE.start_main_~i~0_16) (= 1 (select |v_#valid_21| v_ULTIMATE.start_main_~arr~0.base_13)) (= |v_#memory_int_8| (store |v_#memory_int_9| v_ULTIMATE.start_main_~arr~0.base_13 (store (select |v_#memory_int_9| v_ULTIMATE.start_main_~arr~0.base_13) (+ (* v_ULTIMATE.start_main_~i~0_17 4) v_ULTIMATE.start_main_~arr~0.offset_11) |v_ULTIMATE.start_main_#t~nondet5_8|))))) InVars {ULTIMATE.start_main_~arr~0.offset=v_ULTIMATE.start_main_~arr~0.offset_11, ULTIMATE.start_main_~arr~0.base=v_ULTIMATE.start_main_~arr~0.base_13, ULTIMATE.start_main_#t~nondet5=|v_ULTIMATE.start_main_#t~nondet5_8|, #valid=|v_#valid_21|, #memory_int=|v_#memory_int_9|, ULTIMATE.start_main_~i~0=v_ULTIMATE.start_main_~i~0_17, #length=|v_#length_11|} OutVars{ULTIMATE.start_main_~arr~0.offset=v_ULTIMATE.start_main_~arr~0.offset_11, ULTIMATE.start_main_~arr~0.base=v_ULTIMATE.start_main_~arr~0.base_13, ULTIMATE.start_main_#t~nondet5=|v_ULTIMATE.start_main_#t~nondet5_7|, #valid=|v_#valid_21|, #memory_int=|v_#memory_int_8|, ULTIMATE.start_main_~i~0=v_ULTIMATE.start_main_~i~0_16, #length=|v_#length_11|, ULTIMATE.start_main_#t~post4=|v_ULTIMATE.start_main_#t~post4_5|} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~nondet5, #memory_int, ULTIMATE.start_main_~i~0, ULTIMATE.start_main_#t~post4] 14#L13-3true [2020-07-01 13:02:52,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:52,691 INFO L82 PathProgramCache]: Analyzing trace with hash 519210404, now seen corresponding path program 1 times [2020-07-01 13:02:52,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:52,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600358312] [2020-07-01 13:02:52,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:52,696 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 13:02:52,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896113336] [2020-07-01 13:02:52,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 13:02:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:02:52,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 13:02:52,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 13:02:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 13:02:52,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600358312] [2020-07-01 13:02:52,731 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 13:02:52,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896113336] [2020-07-01 13:02:52,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:02:52,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 13:02:52,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099118315] [2020-07-01 13:02:52,733 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-07-01 13:02:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:02:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 4313, now seen corresponding path program 1 times [2020-07-01 13:02:52,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:02:52,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128512979] [2020-07-01 13:02:52,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:02:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 13:02:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 13:02:52,766 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 13:02:52,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:02:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:02:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:02:52,808 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-01 13:02:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:02:53,314 INFO L93 Difference]: Finished difference Result 17 states and 69 transitions. [2020-07-01 13:02:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:02:53,317 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.AssertionError: unknown kind of automaton at de.uni_freiburg.informatik.ultimate.automata.AutomatonDefinitionPrinter.printAutomaton(AutomatonDefinitionPrinter.java:349) at de.uni_freiburg.informatik.ultimate.automata.AutomatonDefinitionPrinter.toString(AutomatonDefinitionPrinter.java:186) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.TermcompProofBenchmark.reportFiniteModule(TermcompProofBenchmark.java:61) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.refineFinite(BuchiCegarLoop.java:978) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.iterate(BuchiCegarLoop.java:532) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:380) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-01 13:02:53,321 INFO L168 Benchmark]: Toolchain (without parser) took 45265.82 ms. Allocated memory was 514.9 MB in the beginning and 627.6 MB in the end (delta: 112.7 MB). Free memory was 439.0 MB in the beginning and 543.8 MB in the end (delta: -104.8 MB). Peak memory consumption was 7.9 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,321 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 514.9 MB. Free memory is still 458.5 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 13:02:53,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.27 ms. Allocated memory was 514.9 MB in the beginning and 559.9 MB in the end (delta: 45.1 MB). Free memory was 438.3 MB in the beginning and 526.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 27.9 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.47 ms. Allocated memory is still 559.9 MB. Free memory was 526.0 MB in the beginning and 524.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,322 INFO L168 Benchmark]: Boogie Preprocessor took 26.31 ms. Allocated memory is still 559.9 MB. Free memory was 524.6 MB in the beginning and 522.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,323 INFO L168 Benchmark]: RCFGBuilder took 353.94 ms. Allocated memory is still 559.9 MB. Free memory was 522.5 MB in the beginning and 502.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,323 INFO L168 Benchmark]: BlockEncodingV2 took 259.20 ms. Allocated memory is still 559.9 MB. Free memory was 502.6 MB in the beginning and 470.2 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,324 INFO L168 Benchmark]: TraceAbstraction took 43594.84 ms. Allocated memory was 559.9 MB in the beginning and 620.8 MB in the end (delta: 60.8 MB). Free memory was 469.6 MB in the beginning and 442.8 MB in the end (delta: 26.7 MB). Peak memory consumption was 87.6 MB. Max. memory is 50.3 GB. [2020-07-01 13:02:53,324 INFO L168 Benchmark]: BuchiAutomizer took 681.95 ms. Allocated memory was 620.8 MB in the beginning and 627.6 MB in the end (delta: 6.8 MB). Free memory was 442.8 MB in the beginning and 543.8 MB in the end (delta: -101.0 MB). There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 13:02:53,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 27 locations, 33 edges - StatisticsResult: Encoded RCFG 17 locations, 333 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 514.9 MB. Free memory is still 458.5 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 302.27 ms. Allocated memory was 514.9 MB in the beginning and 559.9 MB in the end (delta: 45.1 MB). Free memory was 438.3 MB in the beginning and 526.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 27.9 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 40.47 ms. Allocated memory is still 559.9 MB. Free memory was 526.0 MB in the beginning and 524.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 26.31 ms. Allocated memory is still 559.9 MB. Free memory was 524.6 MB in the beginning and 522.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. * RCFGBuilder took 353.94 ms. Allocated memory is still 559.9 MB. Free memory was 522.5 MB in the beginning and 502.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 259.20 ms. Allocated memory is still 559.9 MB. Free memory was 502.6 MB in the beginning and 470.2 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 50.3 GB. * TraceAbstraction took 43594.84 ms. Allocated memory was 559.9 MB in the beginning and 620.8 MB in the end (delta: 60.8 MB). Free memory was 469.6 MB in the beginning and 442.8 MB in the end (delta: 26.7 MB). Peak memory consumption was 87.6 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 681.95 ms. Allocated memory was 620.8 MB in the beginning and 627.6 MB in the end (delta: 6.8 MB). Free memory was 442.8 MB in the beginning and 543.8 MB in the end (delta: -101.0 MB). There was no memory consumed. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #length * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant [2020-07-01 13:02:53,335 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:53,335 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,336 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,337 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:53,338 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,338 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:53,338 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,339 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,339 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,340 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,340 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,340 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,340 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:53,340 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length Derived loop invariant: ((((((((((((arr2 <= 0 && (\exists ULTIMATE.start_main_#t~malloc3.base : int, ULTIMATE.start_main_~fac~0 : int :: ULTIMATE.start_main_~fac~0 * length * 4 == unknown-#length-unknown[ULTIMATE.start_main_#t~malloc3.base] && !(arr == ULTIMATE.start_main_#t~malloc3.base))) && i <= (arr * -1 + unknown-#length-unknown[arr] + -4) / 4 + 1) && 1 == \valid[arr]) && 1 <= unknown-#length-unknown[arr] / 4) && length * 4 == unknown-#length-unknown[arr]) && 0 <= arr) && arr <= 0) && 1 <= arr2) && 0 < unknown-#StackHeapBarrier-unknown) && 0 <= i) && 1 == \valid[arr2]) && fac * length * 4 == unknown-#length-unknown[arr2]) && 0 <= arr2 - InvariantResult [Line: 16]: Loop Invariant [2020-07-01 13:02:53,341 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:53,342 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,342 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,343 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,343 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,343 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,343 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,343 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:53,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~fac~0,QUANTIFIED] [2020-07-01 13:02:53,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_#t~malloc3.base,QUANTIFIED] [2020-07-01 13:02:53,345 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,345 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-07-01 13:02:53,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-01 13:02:53,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length Derived loop invariant: ((((((((((((0 <= j && arr2 <= 0) && (\exists ULTIMATE.start_main_#t~malloc3.base : int, ULTIMATE.start_main_~fac~0 : int :: ULTIMATE.start_main_~fac~0 * length * 4 == unknown-#length-unknown[ULTIMATE.start_main_#t~malloc3.base] && !(arr == ULTIMATE.start_main_#t~malloc3.base))) && i <= (arr * -1 + unknown-#length-unknown[arr] + -4) / 4 + 1) && 1 == \valid[arr]) && 1 <= unknown-#length-unknown[arr] / 4) && length * 4 == unknown-#length-unknown[arr]) && 0 <= arr) && length <= i) && 1 <= arr2) && 0 < unknown-#StackHeapBarrier-unknown) && 1 == \valid[arr2]) && fac * length * 4 == unknown-#length-unknown[arr2]) && 0 <= arr2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.9s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 22.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 522 SDslu, 120 SDs, 0 SdLazy, 669 SolverSat, 339 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 168 HoareAnnotationTreeSize, 2 FomulaSimplifications, 518 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 167 FormulaSimplificationTreeSizeReductionInter, 16.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 123 ConstructedInterpolants, 10 QuantifiedInterpolants, 7115 SizeOfPredicates, 30 NumberOfNonLiveVariables, 700 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 8/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: AssertionError: unknown kind of automaton de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: AssertionError: unknown kind of automaton: de.uni_freiburg.informatik.ultimate.automata.AutomatonDefinitionPrinter.printAutomaton(AutomatonDefinitionPrinter.java:349) RESULT: Ultimate could not prove your program: Toolchain returned no result. !SESSION 2020-07-01 13:02:04.775 ----------------------------------------------- eclipse.buildId=unknown java.version=1.8.0_242 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -i /export/starexec/sandbox/benchmark/theBenchmark.c Command-line arguments: -os linux -ws gtk -arch x86_64 -consoleLog -data @user.home/.ultimate -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -data /export/starexec/sandbox/tmp/BenchExec_run_T8UPzo/tmp -i /export/starexec/sandbox/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-07-01 13:02:53.773 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check