/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:09:17,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:09:17,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:09:17,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:09:17,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:09:17,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:09:17,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:09:17,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:09:17,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:09:17,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:09:17,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:09:17,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:09:17,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:09:17,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:09:17,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:09:17,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:09:17,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:09:17,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:09:17,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:09:17,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:09:17,436 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 [2019-11-06 19:09:17,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:09:17,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:09:17,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:09:17,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:09:17,478 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:09:17,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:09:17,478 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:09:17,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:09:17,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:09:17,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:09:17,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:09:17,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:09:17,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:09:17,482 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:09:17,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:09:17,483 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:09:17,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:09:17,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:09:17,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:09:17,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:09:17,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:09:17,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:09:17,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:09:17,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:09:17,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:09:17,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:09:17,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:09:17,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:09:17,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:09:17,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:09:17,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:09:17,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:09:17,808 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:09:17,808 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:09:17,809 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35.c [2019-11-06 19:09:17,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40dbc75d/1c747884e71448738c36ec9630dcde81/FLAGfe60b848e [2019-11-06 19:09:18,456 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:09:18,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label35.c [2019-11-06 19:09:18,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40dbc75d/1c747884e71448738c36ec9630dcde81/FLAGfe60b848e [2019-11-06 19:09:18,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40dbc75d/1c747884e71448738c36ec9630dcde81 [2019-11-06 19:09:18,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:09:18,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:09:18,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:18,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:09:18,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:09:18,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:18" (1/1) ... [2019-11-06 19:09:18,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6170030d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:18, skipping insertion in model container [2019-11-06 19:09:18,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:18" (1/1) ... [2019-11-06 19:09:18,736 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:09:18,802 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:09:19,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:19,570 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:09:19,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:19,767 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:09:19,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19 WrapperNode [2019-11-06 19:09:19,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:19,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:09:19,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:09:19,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:09:19,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (1/1) ... [2019-11-06 19:09:19,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:09:19,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:09:19,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:09:19,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:09:19,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (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 [2019-11-06 19:09:20,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:09:20,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:09:20,013 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:09:20,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:09:20,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:09:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:09:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:09:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:09:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:09:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:09:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:09:21,761 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:09:21,765 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:09:21,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:21 BoogieIcfgContainer [2019-11-06 19:09:21,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:09:21,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:09:21,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:09:21,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:09:21,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:09:18" (1/3) ... [2019-11-06 19:09:21,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680ff231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:21, skipping insertion in model container [2019-11-06 19:09:21,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:19" (2/3) ... [2019-11-06 19:09:21,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680ff231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:21, skipping insertion in model container [2019-11-06 19:09:21,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:21" (3/3) ... [2019-11-06 19:09:21,785 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label35.c [2019-11-06 19:09:21,795 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:09:21,809 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:09:21,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:09:21,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:09:21,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:09:21,893 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:09:21,893 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:09:21,893 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:09:21,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:09:21,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:09:21,894 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:09:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:09:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 19:09:21,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:21,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:21,954 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash 524759243, now seen corresponding path program 1 times [2019-11-06 19:09:21,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:21,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674630565] [2019-11-06 19:09:21,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:22,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674630565] [2019-11-06 19:09:22,439 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:22,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:09:22,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119684075] [2019-11-06 19:09:22,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:22,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:22,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:22,473 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:09:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:25,889 INFO L93 Difference]: Finished difference Result 1006 states and 1797 transitions. [2019-11-06 19:09:25,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:25,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2019-11-06 19:09:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:25,921 INFO L225 Difference]: With dead ends: 1006 [2019-11-06 19:09:25,922 INFO L226 Difference]: Without dead ends: 630 [2019-11-06 19:09:25,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-11-06 19:09:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 620. [2019-11-06 19:09:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-06 19:09:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 915 transitions. [2019-11-06 19:09:26,034 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 915 transitions. Word has length 64 [2019-11-06 19:09:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:26,037 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 915 transitions. [2019-11-06 19:09:26,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 915 transitions. [2019-11-06 19:09:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 19:09:26,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:26,052 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, 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] [2019-11-06 19:09:26,052 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1140309603, now seen corresponding path program 1 times [2019-11-06 19:09:26,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:26,055 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918319582] [2019-11-06 19:09:26,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:26,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918319582] [2019-11-06 19:09:26,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078637834] [2019-11-06 19:09:26,393 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 [2019-11-06 19:09:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:26,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:26,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:26,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:26,598 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:26,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918273432] [2019-11-06 19:09:26,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:26,603 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:26,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:26,604 INFO L87 Difference]: Start difference. First operand 620 states and 915 transitions. Second operand 3 states. [2019-11-06 19:09:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:27,756 INFO L93 Difference]: Finished difference Result 1816 states and 2718 transitions. [2019-11-06 19:09:27,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:27,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-11-06 19:09:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:27,765 INFO L225 Difference]: With dead ends: 1816 [2019-11-06 19:09:27,765 INFO L226 Difference]: Without dead ends: 1202 [2019-11-06 19:09:27,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2019-11-06 19:09:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1194. [2019-11-06 19:09:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2019-11-06 19:09:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1631 transitions. [2019-11-06 19:09:27,838 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1631 transitions. Word has length 137 [2019-11-06 19:09:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:27,839 INFO L462 AbstractCegarLoop]: Abstraction has 1194 states and 1631 transitions. [2019-11-06 19:09:27,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1631 transitions. [2019-11-06 19:09:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 19:09:27,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:27,846 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, 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] [2019-11-06 19:09:28,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:28,050 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1496412874, now seen corresponding path program 1 times [2019-11-06 19:09:28,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:28,051 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708220841] [2019-11-06 19:09:28,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:28,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708220841] [2019-11-06 19:09:28,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:28,359 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:09:28,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372652315] [2019-11-06 19:09:28,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:09:28,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:09:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:28,361 INFO L87 Difference]: Start difference. First operand 1194 states and 1631 transitions. Second operand 7 states. [2019-11-06 19:09:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:30,715 INFO L93 Difference]: Finished difference Result 3415 states and 4910 transitions. [2019-11-06 19:09:30,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:09:30,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-11-06 19:09:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:30,737 INFO L225 Difference]: With dead ends: 3415 [2019-11-06 19:09:30,737 INFO L226 Difference]: Without dead ends: 2227 [2019-11-06 19:09:30,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:09:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2019-11-06 19:09:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 2196. [2019-11-06 19:09:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-11-06 19:09:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2885 transitions. [2019-11-06 19:09:30,813 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2885 transitions. Word has length 162 [2019-11-06 19:09:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:30,813 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 2885 transitions. [2019-11-06 19:09:30,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:09:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2885 transitions. [2019-11-06 19:09:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-06 19:09:30,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:30,821 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, 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] [2019-11-06 19:09:30,821 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -229417523, now seen corresponding path program 1 times [2019-11-06 19:09:30,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:30,822 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023475997] [2019-11-06 19:09:30,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:09:31,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023475997] [2019-11-06 19:09:31,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274264148] [2019-11-06 19:09:31,107 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 [2019-11-06 19:09:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:31,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:31,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:09:31,324 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:31,324 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:31,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966333564] [2019-11-06 19:09:31,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:31,325 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:31,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:31,326 INFO L87 Difference]: Start difference. First operand 2196 states and 2885 transitions. Second operand 3 states. [2019-11-06 19:09:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:32,378 INFO L93 Difference]: Finished difference Result 5559 states and 7527 transitions. [2019-11-06 19:09:32,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:32,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2019-11-06 19:09:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:32,399 INFO L225 Difference]: With dead ends: 5559 [2019-11-06 19:09:32,400 INFO L226 Difference]: Without dead ends: 3369 [2019-11-06 19:09:32,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2019-11-06 19:09:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3166. [2019-11-06 19:09:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3166 states. [2019-11-06 19:09:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 4329 transitions. [2019-11-06 19:09:32,532 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 4329 transitions. Word has length 222 [2019-11-06 19:09:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:32,532 INFO L462 AbstractCegarLoop]: Abstraction has 3166 states and 4329 transitions. [2019-11-06 19:09:32,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 4329 transitions. [2019-11-06 19:09:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 19:09:32,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:32,539 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, 3, 3, 3, 3, 3, 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] [2019-11-06 19:09:32,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:32,746 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1392516474, now seen corresponding path program 1 times [2019-11-06 19:09:32,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:32,747 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174160099] [2019-11-06 19:09:32,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 114 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:09:33,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174160099] [2019-11-06 19:09:33,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471221912] [2019-11-06 19:09:33,037 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 [2019-11-06 19:09:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:33,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:09:33,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 19:09:33,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:33,246 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:09:33,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195469213] [2019-11-06 19:09:33,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:33,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:33,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:09:33,248 INFO L87 Difference]: Start difference. First operand 3166 states and 4329 transitions. Second operand 5 states. [2019-11-06 19:09:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:34,823 INFO L93 Difference]: Finished difference Result 6609 states and 9187 transitions. [2019-11-06 19:09:34,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:34,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2019-11-06 19:09:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:34,842 INFO L225 Difference]: With dead ends: 6609 [2019-11-06 19:09:34,843 INFO L226 Difference]: Without dead ends: 3449 [2019-11-06 19:09:34,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:09:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2019-11-06 19:09:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3396. [2019-11-06 19:09:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3396 states. [2019-11-06 19:09:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4454 transitions. [2019-11-06 19:09:34,942 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4454 transitions. Word has length 227 [2019-11-06 19:09:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:34,942 INFO L462 AbstractCegarLoop]: Abstraction has 3396 states and 4454 transitions. [2019-11-06 19:09:34,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4454 transitions. [2019-11-06 19:09:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 19:09:34,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:34,949 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, 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] [2019-11-06 19:09:35,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:35,158 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -176162622, now seen corresponding path program 1 times [2019-11-06 19:09:35,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:35,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927602493] [2019-11-06 19:09:35,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:09:35,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927602493] [2019-11-06 19:09:35,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218795858] [2019-11-06 19:09:35,432 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 [2019-11-06 19:09:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:35,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:35,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:09:35,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:35,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:09:35,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587546428] [2019-11-06 19:09:35,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:35,599 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:09:35,599 INFO L87 Difference]: Start difference. First operand 3396 states and 4454 transitions. Second operand 3 states. [2019-11-06 19:09:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:36,722 INFO L93 Difference]: Finished difference Result 7939 states and 10846 transitions. [2019-11-06 19:09:36,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:36,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-11-06 19:09:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:36,753 INFO L225 Difference]: With dead ends: 7939 [2019-11-06 19:09:36,753 INFO L226 Difference]: Without dead ends: 4737 [2019-11-06 19:09:36,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:09:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2019-11-06 19:09:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 4735. [2019-11-06 19:09:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4735 states. [2019-11-06 19:09:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 6133 transitions. [2019-11-06 19:09:36,923 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 6133 transitions. Word has length 227 [2019-11-06 19:09:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:36,924 INFO L462 AbstractCegarLoop]: Abstraction has 4735 states and 6133 transitions. [2019-11-06 19:09:36,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 6133 transitions. [2019-11-06 19:09:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-06 19:09:36,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:36,937 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, 3, 3, 3, 3, 3, 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] [2019-11-06 19:09:37,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:37,150 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash 860590599, now seen corresponding path program 1 times [2019-11-06 19:09:37,151 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:37,151 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479346157] [2019-11-06 19:09:37,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:37,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479346157] [2019-11-06 19:09:37,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549592734] [2019-11-06 19:09:37,698 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 [2019-11-06 19:09:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:37,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:37,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:09:37,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:37,896 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:09:37,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113317613] [2019-11-06 19:09:37,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:37,897 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:37,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:37,898 INFO L87 Difference]: Start difference. First operand 4735 states and 6133 transitions. Second operand 3 states. [2019-11-06 19:09:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:38,992 INFO L93 Difference]: Finished difference Result 10794 states and 14406 transitions. [2019-11-06 19:09:38,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:38,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2019-11-06 19:09:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:39,021 INFO L225 Difference]: With dead ends: 10794 [2019-11-06 19:09:39,021 INFO L226 Difference]: Without dead ends: 6253 [2019-11-06 19:09:39,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2019-11-06 19:09:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 6253. [2019-11-06 19:09:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6253 states. [2019-11-06 19:09:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6253 states to 6253 states and 8078 transitions. [2019-11-06 19:09:39,223 INFO L78 Accepts]: Start accepts. Automaton has 6253 states and 8078 transitions. Word has length 228 [2019-11-06 19:09:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:39,224 INFO L462 AbstractCegarLoop]: Abstraction has 6253 states and 8078 transitions. [2019-11-06 19:09:39,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6253 states and 8078 transitions. [2019-11-06 19:09:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-06 19:09:39,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:39,235 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, 3, 3, 3, 3, 3, 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] [2019-11-06 19:09:39,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:39,440 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1301706544, now seen corresponding path program 1 times [2019-11-06 19:09:39,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:39,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120515424] [2019-11-06 19:09:39,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 66 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:40,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120515424] [2019-11-06 19:09:40,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939607598] [2019-11-06 19:09:40,049 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 [2019-11-06 19:09:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:40,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:09:40,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:40,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 19:09:40,299 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:40,299 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2019-11-06 19:09:40,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576779392] [2019-11-06 19:09:40,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:40,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:40,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:09:40,306 INFO L87 Difference]: Start difference. First operand 6253 states and 8078 transitions. Second operand 5 states. [2019-11-06 19:09:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:42,122 INFO L93 Difference]: Finished difference Result 12361 states and 16092 transitions. [2019-11-06 19:09:42,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:09:42,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2019-11-06 19:09:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:42,147 INFO L225 Difference]: With dead ends: 12361 [2019-11-06 19:09:42,147 INFO L226 Difference]: Without dead ends: 6302 [2019-11-06 19:09:42,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:09:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2019-11-06 19:09:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6293. [2019-11-06 19:09:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6293 states. [2019-11-06 19:09:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 8161 transitions. [2019-11-06 19:09:42,292 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 8161 transitions. Word has length 231 [2019-11-06 19:09:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:42,292 INFO L462 AbstractCegarLoop]: Abstraction has 6293 states and 8161 transitions. [2019-11-06 19:09:42,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 8161 transitions. [2019-11-06 19:09:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2019-11-06 19:09:42,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:42,305 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:42,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:42,511 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1649361938, now seen corresponding path program 1 times [2019-11-06 19:09:42,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:42,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300083402] [2019-11-06 19:09:42,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 87 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:43,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300083402] [2019-11-06 19:09:43,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584405784] [2019-11-06 19:09:43,204 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 [2019-11-06 19:09:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:43,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:09:43,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:43,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:43,561 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:43,561 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2019-11-06 19:09:43,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967620699] [2019-11-06 19:09:43,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 19:09:43,566 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 19:09:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:09:43,567 INFO L87 Difference]: Start difference. First operand 6293 states and 8161 transitions. Second operand 19 states. [2019-11-06 19:09:45,241 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44