/export/starexec/sandbox/solver/bin/starexec_run_default /export/starexec/sandbox/benchmark/theBenchmark.c /export/starexec/sandbox/output/output_files -------------------------------------------------------------------------------- MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.25-34f2e62 [2020-07-01 12:20:07,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 12:20:07,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 12:20:07,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 12:20:07,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 12:20:07,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 12:20:07,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 12:20:07,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 12:20:07,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 12:20:07,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 12:20:07,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 12:20:07,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 12:20:07,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 12:20:07,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 12:20:07,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 12:20:07,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 12:20:07,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 12:20:07,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 12:20:07,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 12:20:07,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 12:20:07,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 12:20:07,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 12:20:07,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 12:20:07,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 12:20:07,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 12:20:07,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 12:20:07,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 12:20:07,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 12:20:07,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 12:20:07,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 12:20:07,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 12:20:07,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 12:20:07,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 12:20:07,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 12:20:07,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 12:20:07,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 12:20:07,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 12:20:07,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 12:20:07,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 12:20:07,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 12:20:07,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 12:20:07,086 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-07-01 12:20:07,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 12:20:07,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 12:20:07,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 12:20:07,102 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 12:20:07,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 12:20:07,102 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:20:07,103 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 12:20:07,103 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 12:20:07,103 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 12:20:07,103 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 12:20:07,103 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 12:20:07,104 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 12:20:07,104 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 12:20:07,104 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 12:20:07,104 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 12:20:07,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 12:20:07,104 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 12:20:07,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 12:20:07,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 12:20:07,105 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 12:20:07,105 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 12:20:07,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 12:20:07,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 12:20:07,106 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 12:20:07,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 12:20:07,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 12:20:07,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 12:20:07,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 12:20:07,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 12:20:07,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 12:20:07,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 12:20:07,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 12:20:07,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 12:20:07,293 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 12:20:07,293 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:20:07,357 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_exlpAP/tmp/dfa90e4ed4414c75bb4c0bf31967e68c/FLAG24e761dcd [2020-07-01 12:20:07,700 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 12:20:07,701 INFO L160 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:20:07,701 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 12:20:07,708 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_exlpAP/tmp/dfa90e4ed4414c75bb4c0bf31967e68c/FLAG24e761dcd [2020-07-01 12:20:08,865 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/BenchExec_run_exlpAP/tmp/dfa90e4ed4414c75bb4c0bf31967e68c [2020-07-01 12:20:08,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 12:20:08,878 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 12:20:08,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 12:20:08,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 12:20:08,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 12:20:08,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:20:08" (1/1) ... [2020-07-01 12:20:08,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28204f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:08, skipping insertion in model container [2020-07-01 12:20:08,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:20:08" (1/1) ... [2020-07-01 12:20:08,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 12:20:08,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 12:20:09,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:20:09,164 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 12:20:09,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:20:09,198 INFO L208 MainTranslator]: Completed translation [2020-07-01 12:20:09,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09 WrapperNode [2020-07-01 12:20:09,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 12:20:09,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 12:20:09,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 12:20:09,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 12:20:09,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 12:20:09,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 12:20:09,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 12:20:09,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 12:20:09,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 12:20:09,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 12:20:09,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 12:20:09,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 12:20:09,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (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 12:20:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-01 12:20:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-01 12:20:09,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 12:20:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 12:20:09,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 12:20:09,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 12:20:09,601 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-01 12:20:09,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:20:09 BoogieIcfgContainer [2020-07-01 12:20:09,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 12:20:09,605 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 12:20:09,605 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 12:20:09,607 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 12:20:09,608 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:20:09" (1/1) ... [2020-07-01 12:20:09,622 INFO L313 BlockEncoder]: Initial Icfg 32 locations, 36 edges [2020-07-01 12:20:09,624 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 12:20:09,624 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 12:20:09,625 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 12:20:09,625 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:20:09,627 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 12:20:09,628 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 12:20:09,628 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 12:20:09,654 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 12:20:09,689 INFO L200 BlockEncoder]: SBE split 14 edges [2020-07-01 12:20:09,694 INFO L70 emoveInfeasibleEdges]: Removed 1 edges and 0 locations because of local infeasibility [2020-07-01 12:20:09,695 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:20:09,731 INFO L100 BaseMinimizeStates]: Removed 14 edges and 7 locations by large block encoding [2020-07-01 12:20:09,734 INFO L70 RemoveSinkStates]: Removed 1 edges and 1 locations by removing sink states [2020-07-01 12:20:09,735 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 12:20:09,736 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:20:09,736 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 12:20:09,736 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 12:20:09,737 INFO L313 BlockEncoder]: Encoded RCFG 24 locations, 51 edges [2020-07-01 12:20:09,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:20:09 BasicIcfg [2020-07-01 12:20:09,738 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 12:20:09,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 12:20:09,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 12:20:09,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 12:20:09,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 12:20:08" (1/4) ... [2020-07-01 12:20:09,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd7b4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:20:09, skipping insertion in model container [2020-07-01 12:20:09,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:20:09" (2/4) ... [2020-07-01 12:20:09,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd7b4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:20:09, skipping insertion in model container [2020-07-01 12:20:09,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:20:09" (3/4) ... [2020-07-01 12:20:09,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd7b4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:20:09, skipping insertion in model container [2020-07-01 12:20:09,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:20:09" (4/4) ... [2020-07-01 12:20:09,746 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 12:20:09,756 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 12:20:09,764 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-07-01 12:20:09,778 INFO L251 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-07-01 12:20:09,801 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 12:20:09,802 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 12:20:09,802 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 12:20:09,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 12:20:09,802 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 12:20:09,802 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 12:20:09,802 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 12:20:09,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 12:20:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-01 12:20:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-01 12:20:09,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:09,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-01 12:20:09,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 5488974, now seen corresponding path program 1 times [2020-07-01 12:20:09,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:09,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207034313] [2020-07-01 12:20:09,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:10,007 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 12:20:10,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207034313] [2020-07-01 12:20:10,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:20:10,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:20:10,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157239496] [2020-07-01 12:20:10,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:20:10,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:10,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:20:10,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:20:10,033 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-07-01 12:20:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:10,161 INFO L93 Difference]: Finished difference Result 42 states and 92 transitions. [2020-07-01 12:20:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:20:10,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-07-01 12:20:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:10,176 INFO L225 Difference]: With dead ends: 42 [2020-07-01 12:20:10,177 INFO L226 Difference]: Without dead ends: 23 [2020-07-01 12:20:10,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:20:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-01 12:20:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-01 12:20:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-01 12:20:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 47 transitions. [2020-07-01 12:20:10,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 47 transitions. Word has length 4 [2020-07-01 12:20:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:10,218 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 47 transitions. [2020-07-01 12:20:10,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:20:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 47 transitions. [2020-07-01 12:20:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-01 12:20:10,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:10,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-01 12:20:10,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-01 12:20:10,221 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 5488976, now seen corresponding path program 1 times [2020-07-01 12:20:10,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:10,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096547976] [2020-07-01 12:20:10,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:10,253 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 12:20:10,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096547976] [2020-07-01 12:20:10,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:20:10,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:20:10,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715396777] [2020-07-01 12:20:10,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:20:10,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:10,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:20:10,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:20:10,257 INFO L87 Difference]: Start difference. First operand 23 states and 47 transitions. Second operand 3 states. [2020-07-01 12:20:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:10,352 INFO L93 Difference]: Finished difference Result 24 states and 47 transitions. [2020-07-01 12:20:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:20:10,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-07-01 12:20:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:10,354 INFO L225 Difference]: With dead ends: 24 [2020-07-01 12:20:10,354 INFO L226 Difference]: Without dead ends: 23 [2020-07-01 12:20:10,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:20:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-01 12:20:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-01 12:20:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-01 12:20:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 46 transitions. [2020-07-01 12:20:10,361 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 46 transitions. Word has length 4 [2020-07-01 12:20:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:10,361 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 46 transitions. [2020-07-01 12:20:10,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:20:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 46 transitions. [2020-07-01 12:20:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-01 12:20:10,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:10,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-01 12:20:10,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-01 12:20:10,362 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 5488977, now seen corresponding path program 1 times [2020-07-01 12:20:10,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:10,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640222950] [2020-07-01 12:20:10,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:10,396 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 12:20:10,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640222950] [2020-07-01 12:20:10,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:20:10,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 12:20:10,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950889702] [2020-07-01 12:20:10,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:20:10,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:20:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-01 12:20:10,398 INFO L87 Difference]: Start difference. First operand 23 states and 46 transitions. Second operand 4 states. [2020-07-01 12:20:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:10,464 INFO L93 Difference]: Finished difference Result 23 states and 46 transitions. [2020-07-01 12:20:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:20:10,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-07-01 12:20:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:10,466 INFO L225 Difference]: With dead ends: 23 [2020-07-01 12:20:10,466 INFO L226 Difference]: Without dead ends: 22 [2020-07-01 12:20:10,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 12:20:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-01 12:20:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-01 12:20:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-01 12:20:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 45 transitions. [2020-07-01 12:20:10,471 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 45 transitions. Word has length 4 [2020-07-01 12:20:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:10,471 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 45 transitions. [2020-07-01 12:20:10,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:20:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 45 transitions. [2020-07-01 12:20:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-01 12:20:10,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:10,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-01 12:20:10,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-01 12:20:10,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 170159490, now seen corresponding path program 1 times [2020-07-01 12:20:10,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:10,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882128134] [2020-07-01 12:20:10,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:10,504 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 12:20:10,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882128134] [2020-07-01 12:20:10,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:20:10,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:20:10,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308078720] [2020-07-01 12:20:10,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:20:10,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:20:10,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:20:10,507 INFO L87 Difference]: Start difference. First operand 22 states and 45 transitions. Second operand 3 states. [2020-07-01 12:20:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:10,597 INFO L93 Difference]: Finished difference Result 22 states and 45 transitions. [2020-07-01 12:20:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:20:10,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-07-01 12:20:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:10,598 INFO L225 Difference]: With dead ends: 22 [2020-07-01 12:20:10,598 INFO L226 Difference]: Without dead ends: 19 [2020-07-01 12:20:10,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:20:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-01 12:20:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-01 12:20:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-01 12:20:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 39 transitions. [2020-07-01 12:20:10,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 39 transitions. Word has length 5 [2020-07-01 12:20:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:10,603 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 39 transitions. [2020-07-01 12:20:10,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:20:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 39 transitions. [2020-07-01 12:20:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-01 12:20:10,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:10,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-01 12:20:10,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-01 12:20:10,604 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash 170159492, now seen corresponding path program 1 times [2020-07-01 12:20:10,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:10,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184924090] [2020-07-01 12:20:10,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:10,655 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 12:20:10,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184924090] [2020-07-01 12:20:10,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:20:10,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 12:20:10,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221642479] [2020-07-01 12:20:10,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 12:20:10,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:10,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 12:20:10,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:20:10,658 INFO L87 Difference]: Start difference. First operand 19 states and 39 transitions. Second operand 5 states. [2020-07-01 12:20:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:10,831 INFO L93 Difference]: Finished difference Result 34 states and 72 transitions. [2020-07-01 12:20:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 12:20:10,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-07-01 12:20:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:10,833 INFO L225 Difference]: With dead ends: 34 [2020-07-01 12:20:10,833 INFO L226 Difference]: Without dead ends: 31 [2020-07-01 12:20:10,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:20:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-01 12:20:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-07-01 12:20:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-01 12:20:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 58 transitions. [2020-07-01 12:20:10,840 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 58 transitions. Word has length 5 [2020-07-01 12:20:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:10,840 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 58 transitions. [2020-07-01 12:20:10,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 12:20:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 58 transitions. [2020-07-01 12:20:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-07-01 12:20:10,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:10,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:20:10,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-01 12:20:10,841 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1576972878, now seen corresponding path program 1 times [2020-07-01 12:20:10,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:10,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167152002] [2020-07-01 12:20:10,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:10,875 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 12:20:10,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167152002] [2020-07-01 12:20:10,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:20:10,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 12:20:10,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091948356] [2020-07-01 12:20:10,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:20:10,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:20:10,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:20:10,878 INFO L87 Difference]: Start difference. First operand 26 states and 58 transitions. Second operand 3 states. [2020-07-01 12:20:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:10,976 INFO L93 Difference]: Finished difference Result 49 states and 112 transitions. [2020-07-01 12:20:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:20:10,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-07-01 12:20:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:10,978 INFO L225 Difference]: With dead ends: 49 [2020-07-01 12:20:10,978 INFO L226 Difference]: Without dead ends: 30 [2020-07-01 12:20:10,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 12:20:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-01 12:20:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-01 12:20:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-01 12:20:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2020-07-01 12:20:10,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 9 [2020-07-01 12:20:10,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:10,984 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2020-07-01 12:20:10,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:20:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2020-07-01 12:20:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-01 12:20:10,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:10,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:20:10,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-01 12:20:10,985 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:10,986 INFO L82 PathProgramCache]: Analyzing trace with hash -711359625, now seen corresponding path program 1 times [2020-07-01 12:20:10,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:10,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289830459] [2020-07-01 12:20:10,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:11,156 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 12:20:11,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289830459] [2020-07-01 12:20:11,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86585447] [2020-07-01 12:20:11,157 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 12:20:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:11,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-01 12:20:11,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:20:11,247 INFO L477 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-01 12:20:11,293 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-01 12:20:11,294 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 12:20:11,300 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 14 treesize of output 10 [2020-07-01 12:20:11,300 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-01 12:20:11,318 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 12:20:11,322 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2020-07-01 12:20:11,323 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2020-07-01 12:20:11,409 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 12:20:11,409 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2020-07-01 12:20:11,410 INFO L477 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-01 12:20:11,411 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-01 12:20:11,422 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 12:20:11,423 INFO L477 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-01 12:20:11,427 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-01 12:20:11,427 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:27 [2020-07-01 12:20:11,461 INFO L477 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-01 12:20:11,482 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 12:20:11,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-01 12:20:11,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-01 12:20:11,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168622000] [2020-07-01 12:20:11,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-01 12:20:11,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:11,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-01 12:20:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-01 12:20:11,484 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 11 states. [2020-07-01 12:20:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:12,054 INFO L93 Difference]: Finished difference Result 54 states and 101 transitions. [2020-07-01 12:20:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-01 12:20:12,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-07-01 12:20:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:12,055 INFO L225 Difference]: With dead ends: 54 [2020-07-01 12:20:12,055 INFO L226 Difference]: Without dead ends: 51 [2020-07-01 12:20:12,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-07-01 12:20:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-01 12:20:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2020-07-01 12:20:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-01 12:20:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 62 transitions. [2020-07-01 12:20:12,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 62 transitions. Word has length 11 [2020-07-01 12:20:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:12,064 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 62 transitions. [2020-07-01 12:20:12,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-01 12:20:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 62 transitions. [2020-07-01 12:20:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-01 12:20:12,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:12,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:20:12,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-01 12:20:12,266 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash -711359624, now seen corresponding path program 1 times [2020-07-01 12:20:12,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:12,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284952741] [2020-07-01 12:20:12,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:12,323 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 12:20:12,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284952741] [2020-07-01 12:20:12,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090082673] [2020-07-01 12:20:12,323 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 12:20:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:20:12,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 12:20:12,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:20:12,377 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 12:20:12,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-01 12:20:12,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-07-01 12:20:12,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107018756] [2020-07-01 12:20:12,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:20:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:20:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:20:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:20:12,379 INFO L87 Difference]: Start difference. First operand 31 states and 62 transitions. Second operand 4 states. [2020-07-01 12:20:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:20:12,468 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2020-07-01 12:20:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:20:12,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-01 12:20:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:20:12,469 INFO L225 Difference]: With dead ends: 37 [2020-07-01 12:20:12,469 INFO L226 Difference]: Without dead ends: 34 [2020-07-01 12:20:12,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:20:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-01 12:20:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-07-01 12:20:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-01 12:20:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 55 transitions. [2020-07-01 12:20:12,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 55 transitions. Word has length 11 [2020-07-01 12:20:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:20:12,475 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 55 transitions. [2020-07-01 12:20:12,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:20:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 55 transitions. [2020-07-01 12:20:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-01 12:20:12,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:20:12,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:20:12,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:20:12,677 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-07-01 12:20:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:20:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1244857711, now seen corresponding path program 1 times [2020-07-01 12:20:12,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:20:12,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374041133] [2020-07-01 12:20:12,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:20:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:20:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:20:12,747 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 12:20:12,747 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-01 12:20:12,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-01 12:20:12,777 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 12:20:12,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:20:12 BasicIcfg [2020-07-01 12:20:12,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 12:20:12,780 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 12:20:12,780 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 12:20:12,784 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 12:20:12,784 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:20:12,784 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:20:12,784 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:20:12,784 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:20:12,784 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:20:12,785 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-01 12:20:12,786 INFO L168 Benchmark]: Toolchain (without parser) took 3908.70 ms. Allocated memory was 514.9 MB in the beginning and 595.6 MB in the end (delta: 80.7 MB). Free memory was 437.9 MB in the beginning and 526.6 MB in the end (delta: -88.7 MB). There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 12:20:12,786 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 514.9 MB. Free memory is still 458.4 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 12:20:12,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.04 ms. Allocated memory was 514.9 MB in the beginning and 556.3 MB in the end (delta: 41.4 MB). Free memory was 437.3 MB in the beginning and 522.9 MB in the end (delta: -85.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 50.3 GB. [2020-07-01 12:20:12,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.49 ms. Allocated memory is still 556.3 MB. Free memory was 522.9 MB in the beginning and 520.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:20:12,788 INFO L168 Benchmark]: Boogie Preprocessor took 25.61 ms. Allocated memory is still 556.3 MB. Free memory was 520.9 MB in the beginning and 519.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-07-01 12:20:12,789 INFO L168 Benchmark]: RCFGBuilder took 337.78 ms. Allocated memory is still 556.3 MB. Free memory was 519.5 MB in the beginning and 499.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 50.3 GB. [2020-07-01 12:20:12,789 INFO L168 Benchmark]: BlockEncodingV2 took 132.52 ms. Allocated memory is still 556.3 MB. Free memory was 499.4 MB in the beginning and 489.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 50.3 GB. [2020-07-01 12:20:12,790 INFO L168 Benchmark]: TraceAbstraction took 3041.06 ms. Allocated memory was 556.3 MB in the beginning and 595.6 MB in the end (delta: 39.3 MB). Free memory was 488.6 MB in the beginning and 526.6 MB in the end (delta: -38.0 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-07-01 12:20:12,790 INFO L168 Benchmark]: BuchiAutomizer took 4.26 ms. Allocated memory is still 595.6 MB. Free memory is still 526.6 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 12:20:12,794 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 32 locations, 36 edges - StatisticsResult: Encoded RCFG 24 locations, 51 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 458.4 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 320.04 ms. Allocated memory was 514.9 MB in the beginning and 556.3 MB in the end (delta: 41.4 MB). Free memory was 437.3 MB in the beginning and 522.9 MB in the end (delta: -85.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 41.49 ms. Allocated memory is still 556.3 MB. Free memory was 522.9 MB in the beginning and 520.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 25.61 ms. Allocated memory is still 556.3 MB. Free memory was 520.9 MB in the beginning and 519.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 337.78 ms. Allocated memory is still 556.3 MB. Free memory was 519.5 MB in the beginning and 499.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 132.52 ms. Allocated memory is still 556.3 MB. Free memory was 499.4 MB in the beginning and 489.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 50.3 GB. * TraceAbstraction took 3041.06 ms. Allocated memory was 556.3 MB in the beginning and 595.6 MB in the end (delta: 39.3 MB). Free memory was 488.6 MB in the beginning and 526.6 MB in the end (delta: -38.0 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.26 ms. Allocated memory is still 595.6 MB. Free memory is still 526.6 MB. There was no memory consumed. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L12] int length = __VERIFIER_nondet_int(); [L13] COND FALSE !(length < 1) [L16] char* nondetString = (char*) malloc(length * sizeof(char)); [L17] nondetString[length-1] = '\0' [L18] return nondetString; [L30] EXPR \read(*s) [L30] *s != '\0' && *s != (char)c [L30] COND FALSE !(*s != '\0' && *s != (char)c) [L32] EXPR \read(*s) [L32] EXPR (*s == c) ? (char *) s : 0 [L32] return ( (*s == c) ? (char *) s : 0 ); - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 665 SDslu, 209 SDs, 0 SdLazy, 572 SolverSat, 43 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=7, 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, 8 MinimizatonAttempts, 33 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 65 ConstructedInterpolants, 1 QuantifiedInterpolants, 2639 SizeOfPredicates, 12 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 2/5 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 RESULT: Ultimate proved your program to be incorrect! !SESSION 2020-07-01 12:20:04.837 ----------------------------------------------- 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_exlpAP/tmp -i /export/starexec/sandbox/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-07-01 12:20:13.025 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check