/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:17:23,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:17:23,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:17:23,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:17:23,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:17:23,738 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:17:23,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:17:23,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:17:23,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:17:23,740 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:17:23,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:17:23,740 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:17:23,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:17:23,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:17:23,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:17:23,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:17:23,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:17:23,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:17:23,742 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:17:23,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:17:23,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:17:23,742 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:17:23,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:17:23,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:17:23,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:17:23,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:17:23,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:17:23,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:17:23,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:17:23,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:17:23,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:17:23,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:17:23,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:17:23,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:17:23,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:17:24,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:17:24,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:17:24,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:17:24,040 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:17:24,040 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:17:24,041 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-11-23 21:17:24,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfd6e196/7789c6143fc84b548d8b280449228e77/FLAG0096da66e [2019-11-23 21:17:24,739 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:17:24,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-11-23 21:17:24,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfd6e196/7789c6143fc84b548d8b280449228e77/FLAG0096da66e [2019-11-23 21:17:24,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfd6e196/7789c6143fc84b548d8b280449228e77 [2019-11-23 21:17:24,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:17:24,957 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:17:24,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:17:24,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:17:24,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:17:24,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:24" (1/1) ... [2019-11-23 21:17:24,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580da5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:24, skipping insertion in model container [2019-11-23 21:17:24,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:24" (1/1) ... [2019-11-23 21:17:24,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:17:25,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:17:25,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:17:25,781 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:17:26,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:17:26,148 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:17:26,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26 WrapperNode [2019-11-23 21:17:26,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:17:26,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:17:26,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:17:26,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:17:26,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:17:26,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:17:26,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:17:26,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:17:26,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... [2019-11-23 21:17:26,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:17:26,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:17:26,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:17:26,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:17:26,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:17:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:17:26,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:17:28,957 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:17:28,958 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:17:28,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28 BoogieIcfgContainer [2019-11-23 21:17:28,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:17:28,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:17:28,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:17:28,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:17:28,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:24" (1/3) ... [2019-11-23 21:17:28,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c132175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:28, skipping insertion in model container [2019-11-23 21:17:28,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26" (2/3) ... [2019-11-23 21:17:28,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c132175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:28, skipping insertion in model container [2019-11-23 21:17:28,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28" (3/3) ... [2019-11-23 21:17:28,968 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label11.c [2019-11-23 21:17:28,978 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:17:28,987 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:17:28,999 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:17:29,030 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:17:29,031 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:17:29,031 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:17:29,031 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:17:29,031 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:17:29,031 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:17:29,032 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:17:29,032 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:17:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2019-11-23 21:17:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 21:17:29,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:29,069 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:29,069 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2019-11-23 21:17:29,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:29,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091267981] [2019-11-23 21:17:29,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:17:29,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091267981] [2019-11-23 21:17:29,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:29,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:17:29,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705700606] [2019-11-23 21:17:29,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:17:29,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:29,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:17:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:17:29,541 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 4 states. [2019-11-23 21:17:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:33,786 INFO L93 Difference]: Finished difference Result 1454 states and 2762 transitions. [2019-11-23 21:17:33,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:17:33,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-23 21:17:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:33,817 INFO L225 Difference]: With dead ends: 1454 [2019-11-23 21:17:33,817 INFO L226 Difference]: Without dead ends: 991 [2019-11-23 21:17:33,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:17:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-11-23 21:17:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2019-11-23 21:17:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-11-23 21:17:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1567 transitions. [2019-11-23 21:17:33,934 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1567 transitions. Word has length 55 [2019-11-23 21:17:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:33,935 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1567 transitions. [2019-11-23 21:17:33,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:17:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1567 transitions. [2019-11-23 21:17:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-23 21:17:33,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:33,943 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:33,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash -307424911, now seen corresponding path program 1 times [2019-11-23 21:17:33,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:33,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070975721] [2019-11-23 21:17:33,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:17:34,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070975721] [2019-11-23 21:17:34,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:34,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:17:34,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391782041] [2019-11-23 21:17:34,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:17:34,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:17:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:17:34,658 INFO L87 Difference]: Start difference. First operand 991 states and 1567 transitions. Second operand 7 states. [2019-11-23 21:17:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:38,515 INFO L93 Difference]: Finished difference Result 2320 states and 3550 transitions. [2019-11-23 21:17:38,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:17:38,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2019-11-23 21:17:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:38,525 INFO L225 Difference]: With dead ends: 2320 [2019-11-23 21:17:38,525 INFO L226 Difference]: Without dead ends: 1331 [2019-11-23 21:17:38,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:17:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2019-11-23 21:17:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1320. [2019-11-23 21:17:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2019-11-23 21:17:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1902 transitions. [2019-11-23 21:17:38,572 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1902 transitions. Word has length 186 [2019-11-23 21:17:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:38,573 INFO L462 AbstractCegarLoop]: Abstraction has 1320 states and 1902 transitions. [2019-11-23 21:17:38,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:17:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1902 transitions. [2019-11-23 21:17:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-23 21:17:38,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:38,582 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:38,582 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash 631169663, now seen corresponding path program 1 times [2019-11-23 21:17:38,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:38,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032958170] [2019-11-23 21:17:38,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:17:38,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032958170] [2019-11-23 21:17:38,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:38,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:17:38,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996264790] [2019-11-23 21:17:38,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:17:38,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:38,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:17:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:17:38,811 INFO L87 Difference]: Start difference. First operand 1320 states and 1902 transitions. Second operand 3 states. [2019-11-23 21:17:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:40,785 INFO L93 Difference]: Finished difference Result 3296 states and 5031 transitions. [2019-11-23 21:17:40,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:17:40,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2019-11-23 21:17:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:40,800 INFO L225 Difference]: With dead ends: 3296 [2019-11-23 21:17:40,800 INFO L226 Difference]: Without dead ends: 2307 [2019-11-23 21:17:40,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:17:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2019-11-23 21:17:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2019-11-23 21:17:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2307 states. [2019-11-23 21:17:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3034 transitions. [2019-11-23 21:17:40,857 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3034 transitions. Word has length 273 [2019-11-23 21:17:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:40,859 INFO L462 AbstractCegarLoop]: Abstraction has 2307 states and 3034 transitions. [2019-11-23 21:17:40,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:17:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3034 transitions. [2019-11-23 21:17:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-11-23 21:17:40,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:40,874 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:40,874 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash 21087107, now seen corresponding path program 1 times [2019-11-23 21:17:40,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:40,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975788763] [2019-11-23 21:17:40,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2019-11-23 21:17:41,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975788763] [2019-11-23 21:17:41,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:41,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:17:41,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346220739] [2019-11-23 21:17:41,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:17:41,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:17:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:17:41,200 INFO L87 Difference]: Start difference. First operand 2307 states and 3034 transitions. Second operand 3 states. [2019-11-23 21:17:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:43,041 INFO L93 Difference]: Finished difference Result 6257 states and 8427 transitions. [2019-11-23 21:17:43,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:17:43,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 315 [2019-11-23 21:17:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:43,060 INFO L225 Difference]: With dead ends: 6257 [2019-11-23 21:17:43,061 INFO L226 Difference]: Without dead ends: 3623 [2019-11-23 21:17:43,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:17:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2019-11-23 21:17:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3623. [2019-11-23 21:17:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-11-23 21:17:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 3964 transitions. [2019-11-23 21:17:43,139 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 3964 transitions. Word has length 315 [2019-11-23 21:17:43,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:43,140 INFO L462 AbstractCegarLoop]: Abstraction has 3623 states and 3964 transitions. [2019-11-23 21:17:43,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:17:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 3964 transitions. [2019-11-23 21:17:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-11-23 21:17:43,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:43,147 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:43,147 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1477368184, now seen corresponding path program 1 times [2019-11-23 21:17:43,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:43,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102934001] [2019-11-23 21:17:43,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:17:44,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102934001] [2019-11-23 21:17:44,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611671448] [2019-11-23 21:17:44,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-23 21:17:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:44,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:17:44,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:17:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 21:17:44,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:17:44,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:17:44,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346117250] [2019-11-23 21:17:44,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:17:44,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:17:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:17:44,667 INFO L87 Difference]: Start difference. First operand 3623 states and 3964 transitions. Second operand 3 states. [2019-11-23 21:17:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:45,994 INFO L93 Difference]: Finished difference Result 7902 states and 8658 transitions. [2019-11-23 21:17:45,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:17:45,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 355 [2019-11-23 21:17:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:46,021 INFO L225 Difference]: With dead ends: 7902 [2019-11-23 21:17:46,021 INFO L226 Difference]: Without dead ends: 4610 [2019-11-23 21:17:46,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:17:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2019-11-23 21:17:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2019-11-23 21:17:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2019-11-23 21:17:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 4939 transitions. [2019-11-23 21:17:46,140 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 4939 transitions. Word has length 355 [2019-11-23 21:17:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:46,141 INFO L462 AbstractCegarLoop]: Abstraction has 4610 states and 4939 transitions. [2019-11-23 21:17:46,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:17:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 4939 transitions. [2019-11-23 21:17:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2019-11-23 21:17:46,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:46,162 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:46,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:17:46,366 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:46,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1073728449, now seen corresponding path program 1 times [2019-11-23 21:17:46,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:46,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698027840] [2019-11-23 21:17:46,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 234 proven. 4 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-11-23 21:17:47,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698027840] [2019-11-23 21:17:47,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227126239] [2019-11-23 21:17:47,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-23 21:17:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:47,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:17:47,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:17:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 21:17:47,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:17:47,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:17:47,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428407254] [2019-11-23 21:17:47,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:17:47,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:17:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:17:47,372 INFO L87 Difference]: Start difference. First operand 4610 states and 4939 transitions. Second operand 3 states. [2019-11-23 21:17:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:48,600 INFO L93 Difference]: Finished difference Result 8889 states and 9545 transitions. [2019-11-23 21:17:48,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:17:48,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2019-11-23 21:17:48,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:48,620 INFO L225 Difference]: With dead ends: 8889 [2019-11-23 21:17:48,621 INFO L226 Difference]: Without dead ends: 4610 [2019-11-23 21:17:48,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:17:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2019-11-23 21:17:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2019-11-23 21:17:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2019-11-23 21:17:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 4910 transitions. [2019-11-23 21:17:48,697 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 4910 transitions. Word has length 480 [2019-11-23 21:17:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:48,698 INFO L462 AbstractCegarLoop]: Abstraction has 4610 states and 4910 transitions. [2019-11-23 21:17:48,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:17:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 4910 transitions. [2019-11-23 21:17:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2019-11-23 21:17:48,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:48,709 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:48,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:17:48,913 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash -86315415, now seen corresponding path program 1 times [2019-11-23 21:17:48,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:48,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016946578] [2019-11-23 21:17:48,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 21:17:50,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016946578] [2019-11-23 21:17:50,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681012678] [2019-11-23 21:17:50,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-23 21:17:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:50,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:17:50,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:17:50,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:17:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 21:17:50,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:17:50,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 21:17:50,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558856637] [2019-11-23 21:17:50,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:17:50,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:50,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:17:50,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:17:50,941 INFO L87 Difference]: Start difference. First operand 4610 states and 4910 transitions. Second operand 8 states. [2019-11-23 21:17:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:54,751 INFO L93 Difference]: Finished difference Result 9547 states and 10168 transitions. [2019-11-23 21:17:54,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:17:54,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 509 [2019-11-23 21:17:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:54,772 INFO L225 Difference]: With dead ends: 9547 [2019-11-23 21:17:54,773 INFO L226 Difference]: Without dead ends: 5268 [2019-11-23 21:17:54,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:17:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2019-11-23 21:17:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610. [2019-11-23 21:17:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2019-11-23 21:17:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 4874 transitions. [2019-11-23 21:17:54,846 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 4874 transitions. Word has length 509 [2019-11-23 21:17:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:54,847 INFO L462 AbstractCegarLoop]: Abstraction has 4610 states and 4874 transitions. [2019-11-23 21:17:54,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 21:17:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 4874 transitions. [2019-11-23 21:17:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2019-11-23 21:17:54,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:54,867 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:55,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:17:55,072 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:55,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2041151622, now seen corresponding path program 1 times [2019-11-23 21:17:55,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:55,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585895426] [2019-11-23 21:17:55,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 752 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 21:17:55,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585895426] [2019-11-23 21:17:55,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:55,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:17:55,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348405793] [2019-11-23 21:17:55,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:17:55,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:17:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:17:55,687 INFO L87 Difference]: Start difference. First operand 4610 states and 4874 transitions. Second operand 4 states. [2019-11-23 21:17:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:58,017 INFO L93 Difference]: Finished difference Result 11521 states and 12255 transitions. [2019-11-23 21:17:58,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:17:58,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 664 [2019-11-23 21:17:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:58,047 INFO L225 Difference]: With dead ends: 11521 [2019-11-23 21:17:58,047 INFO L226 Difference]: Without dead ends: 7242 [2019-11-23 21:17:58,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:17:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2019-11-23 21:17:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 6913. [2019-11-23 21:17:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6913 states. [2019-11-23 21:17:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7262 transitions. [2019-11-23 21:17:58,147 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7262 transitions. Word has length 664 [2019-11-23 21:17:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:58,148 INFO L462 AbstractCegarLoop]: Abstraction has 6913 states and 7262 transitions. [2019-11-23 21:17:58,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:17:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7262 transitions. [2019-11-23 21:17:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2019-11-23 21:17:58,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:58,161 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:58,161 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash 429370668, now seen corresponding path program 1 times [2019-11-23 21:17:58,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:58,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366850567] [2019-11-23 21:17:58,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 931 proven. 130 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-11-23 21:17:59,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366850567] [2019-11-23 21:17:59,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665225590] [2019-11-23 21:17:59,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-23 21:18:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:00,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:18:00,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 676 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2019-11-23 21:18:00,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:00,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:18:00,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664359909] [2019-11-23 21:18:00,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:00,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:00,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:00,628 INFO L87 Difference]: Start difference. First operand 6913 states and 7262 transitions. Second operand 3 states. [2019-11-23 21:18:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:01,843 INFO L93 Difference]: Finished difference Result 13495 states and 14191 transitions. [2019-11-23 21:18:01,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:01,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 758 [2019-11-23 21:18:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:01,857 INFO L225 Difference]: With dead ends: 13495 [2019-11-23 21:18:01,858 INFO L226 Difference]: Without dead ends: 6913 [2019-11-23 21:18:01,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 758 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2019-11-23 21:18:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6913. [2019-11-23 21:18:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6913 states. [2019-11-23 21:18:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7214 transitions. [2019-11-23 21:18:01,940 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7214 transitions. Word has length 758 [2019-11-23 21:18:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:01,941 INFO L462 AbstractCegarLoop]: Abstraction has 6913 states and 7214 transitions. [2019-11-23 21:18:01,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7214 transitions. [2019-11-23 21:18:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2019-11-23 21:18:01,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:01,957 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:02,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:02,161 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:02,162 INFO L82 PathProgramCache]: Analyzing trace with hash 974388700, now seen corresponding path program 1 times [2019-11-23 21:18:02,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:02,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086938301] [2019-11-23 21:18:02,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1261 proven. 130 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-11-23 21:18:03,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086938301] [2019-11-23 21:18:03,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118367593] [2019-11-23 21:18:03,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-23 21:18:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:04,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:18:04,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 946 proven. 0 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2019-11-23 21:18:04,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:04,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:18:04,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946873297] [2019-11-23 21:18:04,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:04,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:04,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:04,939 INFO L87 Difference]: Start difference. First operand 6913 states and 7214 transitions. Second operand 3 states. [2019-11-23 21:18:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:06,272 INFO L93 Difference]: Finished difference Result 15469 states and 16159 transitions. [2019-11-23 21:18:06,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:06,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 920 [2019-11-23 21:18:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:06,287 INFO L225 Difference]: With dead ends: 15469 [2019-11-23 21:18:06,288 INFO L226 Difference]: Without dead ends: 7571 [2019-11-23 21:18:06,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 920 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2019-11-23 21:18:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2019-11-23 21:18:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2019-11-23 21:18:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7840 transitions. [2019-11-23 21:18:06,388 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7840 transitions. Word has length 920 [2019-11-23 21:18:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:06,390 INFO L462 AbstractCegarLoop]: Abstraction has 7571 states and 7840 transitions. [2019-11-23 21:18:06,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7840 transitions. [2019-11-23 21:18:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2019-11-23 21:18:06,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:06,420 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:06,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:06,633 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1003912974, now seen corresponding path program 1 times [2019-11-23 21:18:06,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:06,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007324239] [2019-11-23 21:18:06,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2803 backedges. 1659 proven. 130 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2019-11-23 21:18:08,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007324239] [2019-11-23 21:18:08,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889477485] [2019-11-23 21:18:08,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:08,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:18:08,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2803 backedges. 1193 proven. 0 refuted. 0 times theorem prover too weak. 1610 trivial. 0 not checked. [2019-11-23 21:18:09,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:09,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:18:09,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980762591] [2019-11-23 21:18:09,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:09,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:09,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:09,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:09,408 INFO L87 Difference]: Start difference. First operand 7571 states and 7840 transitions. Second operand 3 states. [2019-11-23 21:18:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:10,639 INFO L93 Difference]: Finished difference Result 14811 states and 15347 transitions. [2019-11-23 21:18:10,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:10,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1131 [2019-11-23 21:18:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:10,654 INFO L225 Difference]: With dead ends: 14811 [2019-11-23 21:18:10,654 INFO L226 Difference]: Without dead ends: 7571 [2019-11-23 21:18:10,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1140 GetRequests, 1131 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2019-11-23 21:18:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2019-11-23 21:18:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2019-11-23 21:18:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7790 transitions. [2019-11-23 21:18:10,736 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7790 transitions. Word has length 1131 [2019-11-23 21:18:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:10,737 INFO L462 AbstractCegarLoop]: Abstraction has 7571 states and 7790 transitions. [2019-11-23 21:18:10,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7790 transitions. [2019-11-23 21:18:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1460 [2019-11-23 21:18:10,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:10,765 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:10,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:10,970 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash 481614819, now seen corresponding path program 1 times [2019-11-23 21:18:10,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:10,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305503854] [2019-11-23 21:18:10,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3931 backedges. 2081 proven. 130 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2019-11-23 21:18:13,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305503854] [2019-11-23 21:18:13,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807663101] [2019-11-23 21:18:13,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:13,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:18:13,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3931 backedges. 1845 proven. 0 refuted. 0 times theorem prover too weak. 2086 trivial. 0 not checked. [2019-11-23 21:18:14,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:14,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:18:14,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258686732] [2019-11-23 21:18:14,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:14,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:14,772 INFO L87 Difference]: Start difference. First operand 7571 states and 7790 transitions. Second operand 3 states. [2019-11-23 21:18:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:16,060 INFO L93 Difference]: Finished difference Result 16456 states and 16943 transitions. [2019-11-23 21:18:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:16,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1459 [2019-11-23 21:18:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:16,072 INFO L225 Difference]: With dead ends: 16456 [2019-11-23 21:18:16,072 INFO L226 Difference]: Without dead ends: 9216 [2019-11-23 21:18:16,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1468 GetRequests, 1459 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:18:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2019-11-23 21:18:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2019-11-23 21:18:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9216 states. [2019-11-23 21:18:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9452 transitions. [2019-11-23 21:18:16,184 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9452 transitions. Word has length 1459 [2019-11-23 21:18:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:16,184 INFO L462 AbstractCegarLoop]: Abstraction has 9216 states and 9452 transitions. [2019-11-23 21:18:16,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9452 transitions. [2019-11-23 21:18:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1845 [2019-11-23 21:18:16,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:16,225 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:16,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:16,431 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash -524306115, now seen corresponding path program 1 times [2019-11-23 21:18:16,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:16,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694179099] [2019-11-23 21:18:16,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 3862 proven. 0 refuted. 0 times theorem prover too weak. 1758 trivial. 0 not checked. [2019-11-23 21:18:19,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694179099] [2019-11-23 21:18:19,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:19,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:18:19,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289468273] [2019-11-23 21:18:19,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:18:19,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:18:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:18:19,397 INFO L87 Difference]: Start difference. First operand 9216 states and 9452 transitions. Second operand 6 states. [2019-11-23 21:18:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:21,734 INFO L93 Difference]: Finished difference Result 18771 states and 19262 transitions. [2019-11-23 21:18:21,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:18:21,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1844 [2019-11-23 21:18:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:21,747 INFO L225 Difference]: With dead ends: 18771 [2019-11-23 21:18:21,747 INFO L226 Difference]: Without dead ends: 9886 [2019-11-23 21:18:21,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:18:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9886 states. [2019-11-23 21:18:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9886 to 9874. [2019-11-23 21:18:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9874 states. [2019-11-23 21:18:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 10123 transitions. [2019-11-23 21:18:21,856 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 10123 transitions. Word has length 1844 [2019-11-23 21:18:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:21,858 INFO L462 AbstractCegarLoop]: Abstraction has 9874 states and 10123 transitions. [2019-11-23 21:18:21,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:18:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 10123 transitions. [2019-11-23 21:18:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1931 [2019-11-23 21:18:21,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:21,901 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:21,901 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1614570132, now seen corresponding path program 1 times [2019-11-23 21:18:21,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:21,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793719489] [2019-11-23 21:18:21,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 4674 proven. 385 refuted. 0 times theorem prover too weak. 1144 trivial. 0 not checked. [2019-11-23 21:18:25,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793719489] [2019-11-23 21:18:25,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268152225] [2019-11-23 21:18:25,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:26,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 2204 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:18:26,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 3851 proven. 0 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2019-11-23 21:18:27,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:27,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-23 21:18:27,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998438495] [2019-11-23 21:18:27,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:27,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:27,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:27,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:18:27,790 INFO L87 Difference]: Start difference. First operand 9874 states and 10123 transitions. Second operand 3 states. [2019-11-23 21:18:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:28,996 INFO L93 Difference]: Finished difference Result 19746 states and 20250 transitions. [2019-11-23 21:18:28,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:28,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1930 [2019-11-23 21:18:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:29,005 INFO L225 Difference]: With dead ends: 19746 [2019-11-23 21:18:29,005 INFO L226 Difference]: Without dead ends: 10203 [2019-11-23 21:18:29,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1937 GetRequests, 1930 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:18:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2019-11-23 21:18:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9874. [2019-11-23 21:18:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9874 states. [2019-11-23 21:18:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 10091 transitions. [2019-11-23 21:18:29,090 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 10091 transitions. Word has length 1930 [2019-11-23 21:18:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:29,092 INFO L462 AbstractCegarLoop]: Abstraction has 9874 states and 10091 transitions. [2019-11-23 21:18:29,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 10091 transitions. [2019-11-23 21:18:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2024 [2019-11-23 21:18:29,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:29,139 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:29,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:29,345 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1477308186, now seen corresponding path program 1 times [2019-11-23 21:18:29,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:29,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827743975] [2019-11-23 21:18:29,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7932 backedges. 2100 proven. 0 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2019-11-23 21:18:31,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827743975] [2019-11-23 21:18:31,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:31,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:18:31,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324575266] [2019-11-23 21:18:31,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:31,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:18:31,711 INFO L87 Difference]: Start difference. First operand 9874 states and 10091 transitions. Second operand 3 states. [2019-11-23 21:18:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:33,044 INFO L93 Difference]: Finished difference Result 23694 states and 24249 transitions. [2019-11-23 21:18:33,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:33,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2023 [2019-11-23 21:18:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:33,058 INFO L225 Difference]: With dead ends: 23694 [2019-11-23 21:18:33,058 INFO L226 Difference]: Without dead ends: 14151 [2019-11-23 21:18:33,065 INFO L630 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 [2019-11-23 21:18:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2019-11-23 21:18:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13164. [2019-11-23 21:18:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13164 states. [2019-11-23 21:18:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13435 transitions. [2019-11-23 21:18:33,167 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13435 transitions. Word has length 2023 [2019-11-23 21:18:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:33,167 INFO L462 AbstractCegarLoop]: Abstraction has 13164 states and 13435 transitions. [2019-11-23 21:18:33,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13435 transitions. [2019-11-23 21:18:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2133 [2019-11-23 21:18:33,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:33,198 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:33,199 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash -497879742, now seen corresponding path program 1 times [2019-11-23 21:18:33,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:33,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815937461] [2019-11-23 21:18:33,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8468 backedges. 3267 proven. 243 refuted. 0 times theorem prover too weak. 4958 trivial. 0 not checked. [2019-11-23 21:18:36,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815937461] [2019-11-23 21:18:36,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461845263] [2019-11-23 21:18:36,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:37,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 2444 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:18:37,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8468 backedges. 3160 proven. 0 refuted. 0 times theorem prover too weak. 5308 trivial. 0 not checked. [2019-11-23 21:18:40,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:40,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2019-11-23 21:18:40,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112212745] [2019-11-23 21:18:40,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:40,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:18:40,055 INFO L87 Difference]: Start difference. First operand 13164 states and 13435 transitions. Second operand 3 states. [2019-11-23 21:18:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:41,264 INFO L93 Difference]: Finished difference Result 25997 states and 26537 transitions. [2019-11-23 21:18:41,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:41,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2132 [2019-11-23 21:18:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:41,274 INFO L225 Difference]: With dead ends: 25997 [2019-11-23 21:18:41,275 INFO L226 Difference]: Without dead ends: 13164 [2019-11-23 21:18:41,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2138 GetRequests, 2132 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:18:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2019-11-23 21:18:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 13164. [2019-11-23 21:18:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13164 states. [2019-11-23 21:18:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13434 transitions. [2019-11-23 21:18:41,397 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13434 transitions. Word has length 2132 [2019-11-23 21:18:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:41,398 INFO L462 AbstractCegarLoop]: Abstraction has 13164 states and 13434 transitions. [2019-11-23 21:18:41,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13434 transitions. [2019-11-23 21:18:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2224 [2019-11-23 21:18:41,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:41,434 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:41,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:41,635 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1125289394, now seen corresponding path program 1 times [2019-11-23 21:18:41,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:41,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725130209] [2019-11-23 21:18:41,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat