/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 12:29:51,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 12:29:51,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 12:29:51,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 12:29:51,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 12:29:51,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 12:29:51,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 12:29:51,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 12:29:51,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 12:29:51,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 12:29:51,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 12:29:51,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 12:29:51,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 12:29:51,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 12:29:51,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 12:29:51,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 12:29:51,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 12:29:51,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 12:29:51,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 12:29:51,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 12:29:51,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 12:29:51,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 12:29:51,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 12:29:51,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 12:29:51,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 12:29:51,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 12:29:51,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 12:29:51,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 12:29:51,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 12:29:51,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 12:29:51,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 12:29:51,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 12:29:51,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 12:29:51,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 12:29:51,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 12:29:51,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 12:29:51,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 12:29:51,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 12:29:51,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 12:29:51,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 12:29:51,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 12:29:51,876 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-07-01 12:29:51,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 12:29:51,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 12:29:51,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 12:29:51,892 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 12:29:51,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 12:29:51,892 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:29:51,892 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 12:29:51,892 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 12:29:51,893 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 12:29:51,893 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 12:29:51,893 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 12:29:51,893 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 12:29:51,893 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 12:29:51,893 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 12:29:51,894 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 12:29:51,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 12:29:51,894 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 12:29:51,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 12:29:51,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 12:29:51,895 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 12:29:51,895 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 12:29:51,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 12:29:51,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 12:29:51,895 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 12:29:51,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 12:29:51,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 12:29:51,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 12:29:51,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 12:29:51,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 12:29:52,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 12:29:52,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 12:29:52,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 12:29:52,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 12:29:52,083 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 12:29:52,084 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:29:52,148 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_VyWUDw/tmp/02915a75b9ad439c9eaa500159d7f351/FLAGcd6dd0a27 [2020-07-01 12:29:52,498 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 12:29:52,499 INFO L160 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:29:52,499 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 12:29:52,506 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_VyWUDw/tmp/02915a75b9ad439c9eaa500159d7f351/FLAGcd6dd0a27 [2020-07-01 12:29:52,938 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/BenchExec_run_VyWUDw/tmp/02915a75b9ad439c9eaa500159d7f351 [2020-07-01 12:29:52,950 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 12:29:52,951 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 12:29:52,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 12:29:52,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 12:29:52,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 12:29:52,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:29:52" (1/1) ... [2020-07-01 12:29:52,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe2226b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:52, skipping insertion in model container [2020-07-01 12:29:52,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:29:52" (1/1) ... [2020-07-01 12:29:52,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 12:29:52,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 12:29:53,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:29:53,230 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 12:29:53,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:29:53,265 INFO L208 MainTranslator]: Completed translation [2020-07-01 12:29:53,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53 WrapperNode [2020-07-01 12:29:53,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 12:29:53,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 12:29:53,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 12:29:53,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 12:29:53,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 12:29:53,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 12:29:53,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 12:29:53,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 12:29:53,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 12:29:53,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 12:29:53,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 12:29:53,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 12:29:53,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (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 12:29:53,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-01 12:29:53,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 12:29:53,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 12:29:53,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 12:29:53,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-01 12:29:53,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-01 12:29:53,696 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 12:29:53,696 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-01 12:29:53,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:29:53 BoogieIcfgContainer [2020-07-01 12:29:53,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 12:29:53,701 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 12:29:53,701 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 12:29:53,703 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 12:29:53,704 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:29:53" (1/1) ... [2020-07-01 12:29:53,722 INFO L313 BlockEncoder]: Initial Icfg 27 locations, 33 edges [2020-07-01 12:29:53,724 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 12:29:53,724 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 12:29:53,725 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 12:29:53,725 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:29:53,727 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 12:29:53,728 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 12:29:53,728 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 12:29:53,763 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 12:29:53,900 INFO L200 BlockEncoder]: SBE split 10 edges [2020-07-01 12:29:53,907 INFO L70 emoveInfeasibleEdges]: Removed 2 edges and 0 locations because of local infeasibility [2020-07-01 12:29:53,909 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:29:53,945 INFO L100 BaseMinimizeStates]: Removed 16 edges and 8 locations by large block encoding [2020-07-01 12:29:53,948 INFO L70 RemoveSinkStates]: Removed 4 edges and 2 locations by removing sink states [2020-07-01 12:29:53,951 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 12:29:53,951 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:29:53,952 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 12:29:53,952 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 12:29:53,954 INFO L313 BlockEncoder]: Encoded RCFG 17 locations, 334 edges [2020-07-01 12:29:53,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:29:53 BasicIcfg [2020-07-01 12:29:53,955 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 12:29:53,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 12:29:53,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 12:29:53,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 12:29:53,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 12:29:52" (1/4) ... [2020-07-01 12:29:53,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637d3359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:29:53, skipping insertion in model container [2020-07-01 12:29:53,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:29:53" (2/4) ... [2020-07-01 12:29:53,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637d3359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:29:53, skipping insertion in model container [2020-07-01 12:29:53,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:29:53" (3/4) ... [2020-07-01 12:29:53,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637d3359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:29:53, skipping insertion in model container [2020-07-01 12:29:53,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:29:53" (4/4) ... [2020-07-01 12:29:53,963 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 12:29:53,974 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 12:29:53,983 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-01 12:29:53,997 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-01 12:29:54,021 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 12:29:54,022 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 12:29:54,022 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 12:29:54,022 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 12:29:54,022 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 12:29:54,022 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 12:29:54,022 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 12:29:54,023 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 12:29:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-01 12:29:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 12:29:54,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:29:54,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:29:54,048 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 12:29:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:29:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash -114772345, now seen corresponding path program 1 times [2020-07-01 12:29:54,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:29:54,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367873326] [2020-07-01 12:29:54,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:29:54,156 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 12:29:54,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513840475] [2020-07-01 12:29:54,157 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 12:29:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:29:54,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 12:29:54,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:29:54,252 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 12:29:54,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367873326] [2020-07-01 12:29:54,253 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 12:29:54,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513840475] [2020-07-01 12:29:54,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:29:54,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:29:54,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367207401] [2020-07-01 12:29:54,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:29:54,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:29:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:29:54,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:29:54,278 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-01 12:29:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:29:54,966 INFO L93 Difference]: Finished difference Result 29 states and 658 transitions. [2020-07-01 12:29:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:29:54,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 12:29:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:29:54,982 INFO L225 Difference]: With dead ends: 29 [2020-07-01 12:29:54,982 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 12:29:54,986 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 12:29:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 12:29:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 12:29:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 12:29:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 72 transitions. [2020-07-01 12:29:55,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 72 transitions. Word has length 8 [2020-07-01 12:29:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:29:55,028 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 72 transitions. [2020-07-01 12:29:55,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:29:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 72 transitions. [2020-07-01 12:29:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 12:29:55,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:29:55,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:29:55,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-01 12:29:55,232 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 12:29:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:29:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash -114802136, now seen corresponding path program 1 times [2020-07-01 12:29:55,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:29:55,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674606558] [2020-07-01 12:29:55,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:29:55,240 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 12:29:55,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332736069] [2020-07-01 12:29:55,240 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 12:29:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:29:55,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 12:29:55,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:29:55,278 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 12:29:55,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674606558] [2020-07-01 12:29:55,279 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 12:29:55,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332736069] [2020-07-01 12:29:55,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:29:55,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 12:29:55,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914786257] [2020-07-01 12:29:55,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:29:55,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:29:55,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:29:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:29:55,282 INFO L87 Difference]: Start difference. First operand 17 states and 72 transitions. Second operand 3 states. [2020-07-01 12:29:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:29:55,404 INFO L93 Difference]: Finished difference Result 28 states and 121 transitions. [2020-07-01 12:29:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:29:55,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 12:29:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:29:55,406 INFO L225 Difference]: With dead ends: 28 [2020-07-01 12:29:55,406 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 12:29:55,407 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 12:29:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 12:29:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 12:29:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 12:29:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 68 transitions. [2020-07-01 12:29:55,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 68 transitions. Word has length 8 [2020-07-01 12:29:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:29:55,412 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 68 transitions. [2020-07-01 12:29:55,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:29:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 68 transitions. [2020-07-01 12:29:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 12:29:55,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:29:55,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:29:55,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:29:55,614 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 12:29:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:29:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash -114801175, now seen corresponding path program 1 times [2020-07-01 12:29:55,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:29:55,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205269397] [2020-07-01 12:29:55,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:29:55,621 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 12:29:55,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292055424] [2020-07-01 12:29:55,621 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 12:29:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:29:55,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-01 12:29:55,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:29:55,663 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 12:29:55,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205269397] [2020-07-01 12:29:55,663 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 12:29:55,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292055424] [2020-07-01 12:29:55,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:29:55,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 12:29:55,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042236861] [2020-07-01 12:29:55,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:29:55,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:29:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:29:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:29:55,665 INFO L87 Difference]: Start difference. First operand 17 states and 68 transitions. Second operand 3 states. [2020-07-01 12:29:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:29:55,763 INFO L93 Difference]: Finished difference Result 28 states and 117 transitions. [2020-07-01 12:29:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:29:55,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 12:29:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:29:55,765 INFO L225 Difference]: With dead ends: 28 [2020-07-01 12:29:55,765 INFO L226 Difference]: Without dead ends: 17 [2020-07-01 12:29:55,765 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 12:29:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-01 12:29:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-01 12:29:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-01 12:29:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 61 transitions. [2020-07-01 12:29:55,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 61 transitions. Word has length 8 [2020-07-01 12:29:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:29:55,770 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 61 transitions. [2020-07-01 12:29:55,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:29:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 61 transitions. [2020-07-01 12:29:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 12:29:55,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:29:55,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:29:55,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:29:55,972 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 12:29:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:29:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -114799253, now seen corresponding path program 1 times [2020-07-01 12:29:55,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:29:55,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888419971] [2020-07-01 12:29:55,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:29:55,978 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 12:29:55,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670215396] [2020-07-01 12:29:55,979 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 12:29:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:29:56,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 12:29:56,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:29:56,067 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-01 12:29:56,068 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 12:29:56,068 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-01 12:29:56,075 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-01 12:29:56,076 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 12:29:56,076 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-07-01 12:29:56,096 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 12:29:56,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888419971] [2020-07-01 12:29:56,096 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-01 12:29:56,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670215396] [2020-07-01 12:29:56,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:29:56,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:29:56,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933118818] [2020-07-01 12:29:56,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:29:56,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:29:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:29:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:29:56,098 INFO L87 Difference]: Start difference. First operand 17 states and 61 transitions. Second operand 3 states. [2020-07-01 12:29:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:29:56,183 INFO L93 Difference]: Finished difference Result 17 states and 61 transitions. [2020-07-01 12:29:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:29:56,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-01 12:29:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:29:56,184 INFO L225 Difference]: With dead ends: 17 [2020-07-01 12:29:56,184 INFO L226 Difference]: Without dead ends: 15 [2020-07-01 12:29:56,185 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 12:29:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-01 12:29:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-01 12:29:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-01 12:29:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 57 transitions. [2020-07-01 12:29:56,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 57 transitions. Word has length 8 [2020-07-01 12:29:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:29:56,189 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 57 transitions. [2020-07-01 12:29:56,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:29:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 57 transitions. [2020-07-01 12:29:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 12:29:56,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:29:56,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:29:56,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:29:56,391 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 12:29:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:29:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash -114799251, now seen corresponding path program 1 times [2020-07-01 12:29:56,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:29:56,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496955283] [2020-07-01 12:29:56,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:29:56,397 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-01 12:29:56,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061987592] [2020-07-01 12:29:56,398 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 12:29:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:29:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:29:56,455 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 12:29:56,456 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-01 12:29:56,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:29:56,678 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 12:29:56,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:29:56 BasicIcfg [2020-07-01 12:29:56,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 12:29:56,682 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 12:29:56,682 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 12:29:56,685 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 12:29:56,685 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:29:56,685 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:29:56,685 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:29:56,686 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:29:56,686 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:29:56,686 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-01 12:29:56,687 INFO L168 Benchmark]: Toolchain (without parser) took 3736.57 ms. Allocated memory was 514.9 MB in the beginning and 578.8 MB in the end (delta: 64.0 MB). Free memory was 438.1 MB in the beginning and 400.0 MB in the end (delta: 38.1 MB). Peak memory consumption was 102.1 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,688 INFO L168 Benchmark]: CDTParser took 0.18 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 12:29:56,688 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.23 ms. Allocated memory was 514.9 MB in the beginning and 548.9 MB in the end (delta: 34.1 MB). Free memory was 437.5 MB in the beginning and 515.8 MB in the end (delta: -78.3 MB). Peak memory consumption was 27.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.38 ms. Allocated memory is still 548.9 MB. Free memory was 515.8 MB in the beginning and 514.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,690 INFO L168 Benchmark]: Boogie Preprocessor took 26.27 ms. Allocated memory is still 548.9 MB. Free memory was 514.2 MB in the beginning and 512.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,690 INFO L168 Benchmark]: RCFGBuilder took 365.39 ms. Allocated memory is still 548.9 MB. Free memory was 512.0 MB in the beginning and 492.5 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,691 INFO L168 Benchmark]: BlockEncodingV2 took 253.82 ms. Allocated memory is still 548.9 MB. Free memory was 492.5 MB in the beginning and 459.6 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,691 INFO L168 Benchmark]: TraceAbstraction took 2725.33 ms. Allocated memory was 548.9 MB in the beginning and 578.8 MB in the end (delta: 29.9 MB). Free memory was 459.1 MB in the beginning and 401.9 MB in the end (delta: 57.2 MB). Peak memory consumption was 87.1 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,692 INFO L168 Benchmark]: BuchiAutomizer took 4.34 ms. Allocated memory is still 578.8 MB. Free memory was 401.9 MB in the beginning and 400.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:29:56,696 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, 334 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 314.23 ms. Allocated memory was 514.9 MB in the beginning and 548.9 MB in the end (delta: 34.1 MB). Free memory was 437.5 MB in the beginning and 515.8 MB in the end (delta: -78.3 MB). Peak memory consumption was 27.9 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 41.38 ms. Allocated memory is still 548.9 MB. Free memory was 515.8 MB in the beginning and 514.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 26.27 ms. Allocated memory is still 548.9 MB. Free memory was 514.2 MB in the beginning and 512.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 50.3 GB. * RCFGBuilder took 365.39 ms. Allocated memory is still 548.9 MB. Free memory was 512.0 MB in the beginning and 492.5 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 253.82 ms. Allocated memory is still 548.9 MB. Free memory was 492.5 MB in the beginning and 459.6 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 50.3 GB. * TraceAbstraction took 2725.33 ms. Allocated memory was 548.9 MB in the beginning and 578.8 MB in the end (delta: 29.9 MB). Free memory was 459.1 MB in the beginning and 401.9 MB in the end (delta: 57.2 MB). Peak memory consumption was 87.1 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.34 ms. Allocated memory is still 578.8 MB. Free memory was 401.9 MB in the beginning and 400.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L5] int i, j; [L6] int length = __VERIFIER_nondet_int(); [L7] COND TRUE length < 1 [L7] length = 1 [L8] int fac = __VERIFIER_nondet_int(); [L9] COND FALSE !(fac < 1) [L10] int *arr = alloca(length); [L11] int *arr2 = alloca(fac*length); [L12] COND FALSE !(!arr || !arr2) [L13] i=0 [L13] COND TRUE i