/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/Problem14_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:22,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:22,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:22,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:22,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:22,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:22,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:22,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:22,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:22,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:22,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:22,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:22,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:22,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:22,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:22,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:22,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:22,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:22,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:22,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:22,098 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 19:14:22,111 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:22,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:22,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:22,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:22,113 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:22,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:22,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:22,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:22,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:22,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:22,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:22,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:22,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:22,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:22,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:22,115 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:22,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:22,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:22,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:22,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:22,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:22,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:22,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:22,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:22,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:22,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:22,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:22,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:22,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:22,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:22,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:22,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:22,463 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:22,464 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:22,464 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-11-06 19:14:22,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2b73219/f271baceee7d4a6691452877e9ca36ec/FLAGb1dc36dab [2019-11-06 19:14:23,116 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:23,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-11-06 19:14:23,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2b73219/f271baceee7d4a6691452877e9ca36ec/FLAGb1dc36dab [2019-11-06 19:14:23,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2b73219/f271baceee7d4a6691452877e9ca36ec [2019-11-06 19:14:23,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:23,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:23,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:23,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:23,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:23,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:23" (1/1) ... [2019-11-06 19:14:23,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f06454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:23, skipping insertion in model container [2019-11-06 19:14:23,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:23" (1/1) ... [2019-11-06 19:14:23,381 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:23,449 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:24,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:24,070 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:24,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:24,249 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:24,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24 WrapperNode [2019-11-06 19:14:24,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:24,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:24,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:24,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:24,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (1/1) ... [2019-11-06 19:14:24,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:24,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:24,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:24,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:24,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (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 19:14:24,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:24,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:24,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:24,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:24,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:24,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:24,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:24,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:24,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:24,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:24,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:25,775 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:25,776 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:25,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:25 BoogieIcfgContainer [2019-11-06 19:14:25,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:25,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:25,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:25,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:25,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:23" (1/3) ... [2019-11-06 19:14:25,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f91cd2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:25, skipping insertion in model container [2019-11-06 19:14:25,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:24" (2/3) ... [2019-11-06 19:14:25,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f91cd2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:25, skipping insertion in model container [2019-11-06 19:14:25,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:25" (3/3) ... [2019-11-06 19:14:25,787 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label47.c [2019-11-06 19:14:25,797 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:25,808 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:25,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:25,857 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:25,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:25,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:25,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:25,858 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:25,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:25,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:25,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 19:14:25,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:25,896 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] [2019-11-06 19:14:25,898 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1824869262, now seen corresponding path program 1 times [2019-11-06 19:14:25,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:25,920 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962883359] [2019-11-06 19:14:25,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:26,329 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 19:14:26,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962883359] [2019-11-06 19:14:26,331 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:26,332 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:26,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135345195] [2019-11-06 19:14:26,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:26,340 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:26,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:26,359 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:29,018 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:14:29,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:29,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-11-06 19:14:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:29,041 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:14:29,042 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:29,057 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 19:14:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:14:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:14:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:14:29,159 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 39 [2019-11-06 19:14:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:29,159 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:14:29,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:14:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:14:29,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:29,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:29,167 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:29,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:29,167 INFO L82 PathProgramCache]: Analyzing trace with hash 686981166, now seen corresponding path program 1 times [2019-11-06 19:14:29,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:29,168 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466614449] [2019-11-06 19:14:29,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:29,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466614449] [2019-11-06 19:14:29,443 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:29,443 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:14:29,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537340171] [2019-11-06 19:14:29,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:29,448 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:29,449 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:14:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:31,449 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:14:31,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:14:31,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-11-06 19:14:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:31,457 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:14:31,457 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:14:31,460 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 19:14:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:14:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:14:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:14:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:14:31,499 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 125 [2019-11-06 19:14:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:31,500 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:14:31,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:14:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:14:31,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:31,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:31,504 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1152023485, now seen corresponding path program 1 times [2019-11-06 19:14:31,504 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:31,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898098252] [2019-11-06 19:14:31,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:31,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898098252] [2019-11-06 19:14:31,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322939141] [2019-11-06 19:14:31,755 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 19:14:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:31,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:31,912 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:31,912 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:31,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251133332] [2019-11-06 19:14:31,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:31,913 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:31,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:31,914 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-11-06 19:14:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:32,774 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-11-06 19:14:32,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:32,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-11-06 19:14:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:32,792 INFO L225 Difference]: With dead ends: 1680 [2019-11-06 19:14:32,793 INFO L226 Difference]: Without dead ends: 1120 [2019-11-06 19:14:32,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-11-06 19:14:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-11-06 19:14:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-11-06 19:14:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-11-06 19:14:32,858 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 134 [2019-11-06 19:14:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:32,859 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-11-06 19:14:32,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-11-06 19:14:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-06 19:14:32,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:32,874 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:33,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:33,083 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:33,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2146210942, now seen corresponding path program 1 times [2019-11-06 19:14:33,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:33,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770827068] [2019-11-06 19:14:33,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:14:33,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770827068] [2019-11-06 19:14:33,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983946267] [2019-11-06 19:14:33,345 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 19:14:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:33,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:14:33,557 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:33,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:33,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696464249] [2019-11-06 19:14:33,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:33,559 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:33,559 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-11-06 19:14:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:34,532 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-11-06 19:14:34,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:34,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-11-06 19:14:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:34,546 INFO L225 Difference]: With dead ends: 2414 [2019-11-06 19:14:34,546 INFO L226 Difference]: Without dead ends: 1486 [2019-11-06 19:14:34,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-11-06 19:14:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-11-06 19:14:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-11-06 19:14:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-11-06 19:14:34,619 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 237 [2019-11-06 19:14:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:34,621 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-11-06 19:14:34,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-11-06 19:14:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-06 19:14:34,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:34,630 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:34,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:34,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash -799167839, now seen corresponding path program 1 times [2019-11-06 19:14:34,835 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:34,835 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63026779] [2019-11-06 19:14:34,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 19:14:35,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63026779] [2019-11-06 19:14:35,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738071841] [2019-11-06 19:14:35,231 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 19:14:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:35,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:14:35,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:35,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 19:14:35,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701752843] [2019-11-06 19:14:35,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:35,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:35,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:35,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:35,396 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-11-06 19:14:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:36,318 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-11-06 19:14:36,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:36,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2019-11-06 19:14:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:36,333 INFO L225 Difference]: With dead ends: 3156 [2019-11-06 19:14:36,333 INFO L226 Difference]: Without dead ends: 1858 [2019-11-06 19:14:36,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-11-06 19:14:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-11-06 19:14:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-11-06 19:14:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-11-06 19:14:36,411 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 256 [2019-11-06 19:14:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:36,413 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-11-06 19:14:36,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-11-06 19:14:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-11-06 19:14:36,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:36,422 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:36,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:36,634 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:36,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2008848013, now seen corresponding path program 1 times [2019-11-06 19:14:36,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:36,635 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631835416] [2019-11-06 19:14:36,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:37,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631835416] [2019-11-06 19:14:37,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20846050] [2019-11-06 19:14:37,044 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 19:14:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:14:37,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:37,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 19:14:37,534 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:37,534 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-11-06 19:14:37,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537577184] [2019-11-06 19:14:37,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:37,535 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:37,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:37,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:37,536 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-11-06 19:14:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:39,078 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-11-06 19:14:39,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:39,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2019-11-06 19:14:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:39,092 INFO L225 Difference]: With dead ends: 3930 [2019-11-06 19:14:39,092 INFO L226 Difference]: Without dead ends: 2262 [2019-11-06 19:14:39,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:14:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-11-06 19:14:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-11-06 19:14:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-11-06 19:14:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-11-06 19:14:39,172 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 262 [2019-11-06 19:14:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:39,172 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-11-06 19:14:39,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-11-06 19:14:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-11-06 19:14:39,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:39,181 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:39,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:39,386 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1769612725, now seen corresponding path program 1 times [2019-11-06 19:14:39,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:39,387 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088208456] [2019-11-06 19:14:39,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 106 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:14:40,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088208456] [2019-11-06 19:14:40,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762652045] [2019-11-06 19:14:40,954 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 19:14:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:41,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:14:41,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:41,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 289 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 19:14:41,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:41,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:14:41,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353152626] [2019-11-06 19:14:41,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:14:41,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:14:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:41,371 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-11-06 19:14:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:45,456 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-11-06 19:14:45,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:14:45,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 346 [2019-11-06 19:14:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:45,470 INFO L225 Difference]: With dead ends: 4460 [2019-11-06 19:14:45,471 INFO L226 Difference]: Without dead ends: 2349 [2019-11-06 19:14:45,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:14:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-11-06 19:14:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-11-06 19:14:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-11-06 19:14:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-11-06 19:14:45,557 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 346 [2019-11-06 19:14:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:45,558 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-11-06 19:14:45,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:14:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-11-06 19:14:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2019-11-06 19:14:45,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:45,571 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:45,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:45,784 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash -721277978, now seen corresponding path program 1 times [2019-11-06 19:14:45,784 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:45,785 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371012638] [2019-11-06 19:14:45,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 171 proven. 149 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 19:14:46,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371012638] [2019-11-06 19:14:46,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688471528] [2019-11-06 19:14:46,666 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 19:14:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:46,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:46,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:14:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-06 19:14:46,997 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:46,997 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-11-06 19:14:46,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690830857] [2019-11-06 19:14:47,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:47,000 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:47,001 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-11-06 19:14:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:48,112 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-11-06 19:14:48,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:48,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 371 [2019-11-06 19:14:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:48,125 INFO L225 Difference]: With dead ends: 5098 [2019-11-06 19:14:48,125 INFO L226 Difference]: Without dead ends: 2836 [2019-11-06 19:14:48,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:14:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-11-06 19:14:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-11-06 19:14:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-11-06 19:14:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-11-06 19:14:48,199 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 371 [2019-11-06 19:14:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:48,200 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-11-06 19:14:48,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-11-06 19:14:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2019-11-06 19:14:48,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:48,213 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:48,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:48,418 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -358273966, now seen corresponding path program 1 times [2019-11-06 19:14:48,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:48,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855578992] [2019-11-06 19:14:48,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 354 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:49,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855578992] [2019-11-06 19:14:49,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059258678] [2019-11-06 19:14:49,085 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 19:14:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:49,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:49,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 645 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-06 19:14:49,484 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:49,484 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:14:49,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100325606] [2019-11-06 19:14:49,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:49,486 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:49,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:49,487 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-11-06 19:14:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:51,725 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-11-06 19:14:51,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:14:51,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 481 [2019-11-06 19:14:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:51,738 INFO L225 Difference]: With dead ends: 5490 [2019-11-06 19:14:51,738 INFO L226 Difference]: Without dead ends: 2846 [2019-11-06 19:14:51,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-11-06 19:14:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-11-06 19:14:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-11-06 19:14:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-11-06 19:14:51,814 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 481 [2019-11-06 19:14:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:51,815 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-11-06 19:14:51,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-11-06 19:14:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2019-11-06 19:14:51,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:51,831 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:52,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:52,042 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:52,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1024360186, now seen corresponding path program 1 times [2019-11-06 19:14:52,043 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:52,043 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060271360] [2019-11-06 19:14:52,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 478 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:14:53,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060271360] [2019-11-06 19:14:53,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860042091] [2019-11-06 19:14:53,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:14:53,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:53,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 848 proven. 2 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2019-11-06 19:14:54,093 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:54,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:14:54,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204937258] [2019-11-06 19:14:54,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:14:54,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:54,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:14:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:54,096 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-11-06 19:14:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:56,389 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-11-06 19:14:56,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:14:56,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 565 [2019-11-06 19:14:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:56,406 INFO L225 Difference]: With dead ends: 5780 [2019-11-06 19:14:56,406 INFO L226 Difference]: Without dead ends: 3085 [2019-11-06 19:14:56,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 584 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:14:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-11-06 19:14:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-11-06 19:14:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-11-06 19:14:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-11-06 19:14:56,482 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 565 [2019-11-06 19:14:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:56,483 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-11-06 19:14:56,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:14:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-11-06 19:14:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2019-11-06 19:14:56,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:56,495 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:56,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:56,700 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1305863078, now seen corresponding path program 2 times [2019-11-06 19:14:56,701 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:56,701 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112973573] [2019-11-06 19:14:56,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 701 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-11-06 19:14:57,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112973573] [2019-11-06 19:14:57,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871176502] [2019-11-06 19:14:57,791 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:57,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:14:57,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:14:57,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:57,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:58,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 900 proven. 2 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2019-11-06 19:14:58,231 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:58,231 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:14:58,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2501791] [2019-11-06 19:14:58,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:14:58,234 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:14:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:58,234 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.