/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/Problem16_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:38,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:38,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:38,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:17:38,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:38,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:38,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:38,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:38,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:38,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:38,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:38,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:38,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:38,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:38,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:38,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:38,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:17:38,957 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 19:17:38,971 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:38,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:38,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:38,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:38,973 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:38,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:38,973 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:38,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:38,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:38,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:38,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:38,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:38,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:38,975 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:38,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:38,975 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:38,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:38,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:38,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:38,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:38,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:38,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:38,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:38,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:38,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:38,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:38,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:38,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:38,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:39,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:39,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:39,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:39,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:39,299 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:39,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-11-06 19:17:39,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30fcb1ebd/d09d654238be43b8ad383ee9c86ef0ff/FLAG959d92c79 [2019-11-06 19:17:40,085 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:40,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-11-06 19:17:40,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30fcb1ebd/d09d654238be43b8ad383ee9c86ef0ff/FLAG959d92c79 [2019-11-06 19:17:40,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30fcb1ebd/d09d654238be43b8ad383ee9c86ef0ff [2019-11-06 19:17:40,322 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:40,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:40,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:40,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:40,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:40,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:40" (1/1) ... [2019-11-06 19:17:40,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa8ced9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:40, skipping insertion in model container [2019-11-06 19:17:40,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:40" (1/1) ... [2019-11-06 19:17:40,343 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:40,425 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:41,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:41,484 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:41,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:41,727 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:41,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41 WrapperNode [2019-11-06 19:17:41,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:41,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:41,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:41,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:41,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:41,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:41,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:41,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:41,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (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 19:17:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:44,294 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:44,294 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:44,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:44 BoogieIcfgContainer [2019-11-06 19:17:44,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:44,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:44,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:44,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:44,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:40" (1/3) ... [2019-11-06 19:17:44,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa19066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:44, skipping insertion in model container [2019-11-06 19:17:44,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (2/3) ... [2019-11-06 19:17:44,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa19066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:44, skipping insertion in model container [2019-11-06 19:17:44,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:44" (3/3) ... [2019-11-06 19:17:44,309 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-11-06 19:17:44,320 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:44,330 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:44,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:44,379 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:44,379 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:44,379 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:44,379 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:44,380 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:44,380 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:44,380 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:44,380 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 19:17:44,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:44,417 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 19:17:44,419 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1802126811, now seen corresponding path program 1 times [2019-11-06 19:17:44,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:44,434 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091653507] [2019-11-06 19:17:44,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:44,870 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 19:17:44,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091653507] [2019-11-06 19:17:44,872 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:44,872 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:44,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306568763] [2019-11-06 19:17:44,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:44,880 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:44,897 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:49,786 INFO L93 Difference]: Finished difference Result 1515 states and 2849 transitions. [2019-11-06 19:17:49,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:49,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2019-11-06 19:17:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:49,816 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:49,816 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:49,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1618 transitions. [2019-11-06 19:17:49,985 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1618 transitions. Word has length 64 [2019-11-06 19:17:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:49,986 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1618 transitions. [2019-11-06 19:17:49,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1618 transitions. [2019-11-06 19:17:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-06 19:17:50,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:50,010 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, 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 19:17:50,010 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash 206002368, now seen corresponding path program 1 times [2019-11-06 19:17:50,012 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:50,012 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547750778] [2019-11-06 19:17:50,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:50,502 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 19:17:50,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547750778] [2019-11-06 19:17:50,503 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:50,503 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:50,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755493090] [2019-11-06 19:17:50,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:50,509 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:50,509 INFO L87 Difference]: Start difference. First operand 1031 states and 1618 transitions. Second operand 9 states. [2019-11-06 19:17:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:54,388 INFO L93 Difference]: Finished difference Result 3113 states and 4945 transitions. [2019-11-06 19:17:54,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:54,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 184 [2019-11-06 19:17:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:54,403 INFO L225 Difference]: With dead ends: 3113 [2019-11-06 19:17:54,404 INFO L226 Difference]: Without dead ends: 2088 [2019-11-06 19:17:54,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:17:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2019-11-06 19:17:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2070. [2019-11-06 19:17:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-11-06 19:17:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2950 transitions. [2019-11-06 19:17:54,489 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2950 transitions. Word has length 184 [2019-11-06 19:17:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:54,491 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2950 transitions. [2019-11-06 19:17:54,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2950 transitions. [2019-11-06 19:17:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:17:54,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:54,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:54,527 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2018610233, now seen corresponding path program 1 times [2019-11-06 19:17:54,528 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:54,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574837875] [2019-11-06 19:17:54,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:17:54,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574837875] [2019-11-06 19:17:54,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135735655] [2019-11-06 19:17:54,871 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 19:17:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:55,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:55,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:55,204 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:55,207 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:17:55,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062142663] [2019-11-06 19:17:55,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:55,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:55,212 INFO L87 Difference]: Start difference. First operand 2070 states and 2950 transitions. Second operand 11 states. [2019-11-06 19:17:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:59,418 INFO L93 Difference]: Finished difference Result 5239 states and 7431 transitions. [2019-11-06 19:17:59,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:17:59,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2019-11-06 19:17:59,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:59,442 INFO L225 Difference]: With dead ends: 5239 [2019-11-06 19:17:59,442 INFO L226 Difference]: Without dead ends: 3175 [2019-11-06 19:17:59,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:17:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2019-11-06 19:17:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3121. [2019-11-06 19:17:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3121 states. [2019-11-06 19:17:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4041 transitions. [2019-11-06 19:17:59,559 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4041 transitions. Word has length 234 [2019-11-06 19:17:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:59,561 INFO L462 AbstractCegarLoop]: Abstraction has 3121 states and 4041 transitions. [2019-11-06 19:17:59,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:17:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4041 transitions. [2019-11-06 19:17:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-11-06 19:17:59,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:59,568 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, 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] [2019-11-06 19:17:59,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:59,781 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1882479951, now seen corresponding path program 1 times [2019-11-06 19:17:59,782 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:59,782 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829802758] [2019-11-06 19:17:59,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:18:00,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829802758] [2019-11-06 19:18:00,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472952095] [2019-11-06 19:18:00,253 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 19:18:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:00,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 19:18:00,500 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:00,501 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:18:00,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133993924] [2019-11-06 19:18:00,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:18:00,503 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:18:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:18:00,504 INFO L87 Difference]: Start difference. First operand 3121 states and 4041 transitions. Second operand 3 states. [2019-11-06 19:18:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:02,007 INFO L93 Difference]: Finished difference Result 4136 states and 5213 transitions. [2019-11-06 19:18:02,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:18:02,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2019-11-06 19:18:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:02,031 INFO L225 Difference]: With dead ends: 4136 [2019-11-06 19:18:02,031 INFO L226 Difference]: Without dead ends: 4134 [2019-11-06 19:18:02,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:18:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2019-11-06 19:18:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3121. [2019-11-06 19:18:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3121 states. [2019-11-06 19:18:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4040 transitions. [2019-11-06 19:18:02,128 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4040 transitions. Word has length 326 [2019-11-06 19:18:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:02,129 INFO L462 AbstractCegarLoop]: Abstraction has 3121 states and 4040 transitions. [2019-11-06 19:18:02,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:18:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4040 transitions. [2019-11-06 19:18:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2019-11-06 19:18:02,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:02,144 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, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:02,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:02,350 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1117184096, now seen corresponding path program 1 times [2019-11-06 19:18:02,351 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:02,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062336604] [2019-11-06 19:18:02,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 333 proven. 199 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-06 19:18:03,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062336604] [2019-11-06 19:18:03,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868330271] [2019-11-06 19:18:03,324 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 19:18:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:03,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:03,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 622 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-06 19:18:03,894 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:03,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:03,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700960091] [2019-11-06 19:18:03,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:03,897 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:03,898 INFO L87 Difference]: Start difference. First operand 3121 states and 4040 transitions. Second operand 12 states. [2019-11-06 19:18:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:15,147 INFO L93 Difference]: Finished difference Result 9775 states and 12850 transitions. [2019-11-06 19:18:15,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 19:18:15,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 511 [2019-11-06 19:18:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:15,179 INFO L225 Difference]: With dead ends: 9775 [2019-11-06 19:18:15,180 INFO L226 Difference]: Without dead ends: 6660 [2019-11-06 19:18:15,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 535 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-11-06 19:18:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6660 states. [2019-11-06 19:18:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6660 to 5928. [2019-11-06 19:18:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5928 states. [2019-11-06 19:18:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 7612 transitions. [2019-11-06 19:18:15,335 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 7612 transitions. Word has length 511 [2019-11-06 19:18:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:15,336 INFO L462 AbstractCegarLoop]: Abstraction has 5928 states and 7612 transitions. [2019-11-06 19:18:15,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 7612 transitions. [2019-11-06 19:18:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2019-11-06 19:18:15,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:15,361 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, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:15,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:15,565 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1905405812, now seen corresponding path program 1 times [2019-11-06 19:18:15,566 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:15,566 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594111592] [2019-11-06 19:18:15,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat