/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:52,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:52,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:52,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:07:52,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:52,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:52,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:52,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:52,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:52,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:52,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:52,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:52,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:52,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:52,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:52,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:52,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:07:52,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:52,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:52,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:52,389 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 19:07:52,416 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:52,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:52,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:52,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:52,418 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:52,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:52,419 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:52,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:52,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:52,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:52,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:52,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:52,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:52,420 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:52,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:52,420 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:52,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:52,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:52,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:52,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:52,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:52,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:52,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:52,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:52,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:52,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:52,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:52,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:52,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:52,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:52,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:52,723 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:52,725 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:52,725 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:52,726 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-11-06 19:07:52,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54239d05/a1436dcec4cc46c8adbf2dd2bc5bb0ef/FLAG5a9667e00 [2019-11-06 19:07:53,459 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:53,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-11-06 19:07:53,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54239d05/a1436dcec4cc46c8adbf2dd2bc5bb0ef/FLAG5a9667e00 [2019-11-06 19:07:53,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54239d05/a1436dcec4cc46c8adbf2dd2bc5bb0ef [2019-11-06 19:07:53,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:53,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:53,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:53,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:53,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:53,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:53" (1/1) ... [2019-11-06 19:07:53,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318fff0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:53, skipping insertion in model container [2019-11-06 19:07:53,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:53" (1/1) ... [2019-11-06 19:07:53,746 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:53,810 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:54,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:54,472 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:54,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:54,719 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:54,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54 WrapperNode [2019-11-06 19:07:54,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:54,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:54,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:54,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:54,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (1/1) ... [2019-11-06 19:07:54,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:54,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:54,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:54,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:54,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (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 19:07:55,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:55,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:55,014 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:55,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:56,969 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:56,969 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:56,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:56 BoogieIcfgContainer [2019-11-06 19:07:56,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:56,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:56,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:56,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:56,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:53" (1/3) ... [2019-11-06 19:07:56,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be6f377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:56, skipping insertion in model container [2019-11-06 19:07:56,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:54" (2/3) ... [2019-11-06 19:07:56,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be6f377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:56, skipping insertion in model container [2019-11-06 19:07:56,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:56" (3/3) ... [2019-11-06 19:07:56,988 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2019-11-06 19:07:57,002 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:57,012 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:57,025 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:57,066 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:57,067 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:57,067 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:57,067 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:57,067 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:57,067 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:57,068 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:57,068 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:07:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 19:07:57,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:57,142 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:57,144 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times [2019-11-06 19:07:57,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:57,168 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700282602] [2019-11-06 19:07:57,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:57,794 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 19:07:57,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700282602] [2019-11-06 19:07:57,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:57,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:07:57,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358573325] [2019-11-06 19:07:57,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:57,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:07:57,820 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:01,089 INFO L93 Difference]: Finished difference Result 993 states and 1777 transitions. [2019-11-06 19:08:01,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:01,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2019-11-06 19:08:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:01,111 INFO L225 Difference]: With dead ends: 993 [2019-11-06 19:08:01,112 INFO L226 Difference]: Without dead ends: 632 [2019-11-06 19:08:01,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-06 19:08:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2019-11-06 19:08:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 19:08:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-11-06 19:08:01,244 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 72 [2019-11-06 19:08:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:01,245 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-11-06 19:08:01,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-11-06 19:08:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 19:08:01,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:01,254 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, 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] [2019-11-06 19:08:01,254 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:01,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:01,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times [2019-11-06 19:08:01,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:01,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384249122] [2019-11-06 19:08:01,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:01,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384249122] [2019-11-06 19:08:01,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:01,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:01,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589829767] [2019-11-06 19:08:01,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:01,646 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:01,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:01,646 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states. [2019-11-06 19:08:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:04,453 INFO L93 Difference]: Finished difference Result 1873 states and 2696 transitions. [2019-11-06 19:08:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:04,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 152 [2019-11-06 19:08:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:04,462 INFO L225 Difference]: With dead ends: 1873 [2019-11-06 19:08:04,462 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 19:08:04,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 19:08:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226. [2019-11-06 19:08:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-11-06 19:08:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions. [2019-11-06 19:08:04,518 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 152 [2019-11-06 19:08:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:04,519 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions. [2019-11-06 19:08:04,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions. [2019-11-06 19:08:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 19:08:04,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:04,526 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, 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] [2019-11-06 19:08:04,527 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:04,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times [2019-11-06 19:08:04,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:04,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205156141] [2019-11-06 19:08:04,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 61 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:04,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205156141] [2019-11-06 19:08:04,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144526580] [2019-11-06 19:08:04,775 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 19:08:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:04,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:05,010 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:05,010 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-06 19:08:05,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782575092] [2019-11-06 19:08:05,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:05,012 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:05,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:05,012 INFO L87 Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states. [2019-11-06 19:08:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:06,062 INFO L93 Difference]: Finished difference Result 3612 states and 4883 transitions. [2019-11-06 19:08:06,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:06,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2019-11-06 19:08:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:06,086 INFO L225 Difference]: With dead ends: 3612 [2019-11-06 19:08:06,086 INFO L226 Difference]: Without dead ends: 2392 [2019-11-06 19:08:06,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2019-11-06 19:08:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189. [2019-11-06 19:08:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2189 states. [2019-11-06 19:08:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions. [2019-11-06 19:08:06,260 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 203 [2019-11-06 19:08:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:06,261 INFO L462 AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions. [2019-11-06 19:08:06,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions. [2019-11-06 19:08:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-06 19:08:06,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:06,271 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:08:06,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:06,472 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash 331775261, now seen corresponding path program 1 times [2019-11-06 19:08:06,474 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:06,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565935040] [2019-11-06 19:08:06,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 130 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:08:06,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565935040] [2019-11-06 19:08:06,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791218109] [2019-11-06 19:08:06,971 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 19:08:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:08:07,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 19:08:07,231 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:07,232 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:08:07,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245459881] [2019-11-06 19:08:07,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:07,235 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:07,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:07,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:07,235 INFO L87 Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states. [2019-11-06 19:08:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:08,978 INFO L93 Difference]: Finished difference Result 5406 states and 7546 transitions. [2019-11-06 19:08:08,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:08,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-11-06 19:08:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:08,998 INFO L225 Difference]: With dead ends: 5406 [2019-11-06 19:08:08,999 INFO L226 Difference]: Without dead ends: 3223 [2019-11-06 19:08:09,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2019-11-06 19:08:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183. [2019-11-06 19:08:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2019-11-06 19:08:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4270 transitions. [2019-11-06 19:08:09,105 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4270 transitions. Word has length 238 [2019-11-06 19:08:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:09,105 INFO L462 AbstractCegarLoop]: Abstraction has 3183 states and 4270 transitions. [2019-11-06 19:08:09,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4270 transitions. [2019-11-06 19:08:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-11-06 19:08:09,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:09,113 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:09,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:09,322 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1251397776, now seen corresponding path program 1 times [2019-11-06 19:08:09,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:09,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038072217] [2019-11-06 19:08:09,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:09,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038072217] [2019-11-06 19:08:09,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333060206] [2019-11-06 19:08:09,850 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 19:08:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:09,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:10,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:10,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:10,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463222642] [2019-11-06 19:08:10,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:10,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:10,056 INFO L87 Difference]: Start difference. First operand 3183 states and 4270 transitions. Second operand 3 states. [2019-11-06 19:08:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:11,100 INFO L93 Difference]: Finished difference Result 7147 states and 9731 transitions. [2019-11-06 19:08:11,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:11,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2019-11-06 19:08:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:11,126 INFO L225 Difference]: With dead ends: 7147 [2019-11-06 19:08:11,126 INFO L226 Difference]: Without dead ends: 4158 [2019-11-06 19:08:11,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2019-11-06 19:08:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3953. [2019-11-06 19:08:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3953 states. [2019-11-06 19:08:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 5305 transitions. [2019-11-06 19:08:11,280 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 5305 transitions. Word has length 239 [2019-11-06 19:08:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:11,281 INFO L462 AbstractCegarLoop]: Abstraction has 3953 states and 5305 transitions. [2019-11-06 19:08:11,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 5305 transitions. [2019-11-06 19:08:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-11-06 19:08:11,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:11,294 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:11,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:11,507 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1992228476, now seen corresponding path program 1 times [2019-11-06 19:08:11,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:11,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119918285] [2019-11-06 19:08:11,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 7 proven. 129 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 19:08:11,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119918285] [2019-11-06 19:08:11,940 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166862047] [2019-11-06 19:08:11,940 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 19:08:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:12,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:12,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:12,245 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:12,245 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2019-11-06 19:08:12,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193397761] [2019-11-06 19:08:12,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 19:08:12,246 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 19:08:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:12,247 INFO L87 Difference]: Start difference. First operand 3953 states and 5305 transitions. Second operand 14 states. [2019-11-06 19:08:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:23,983 INFO L93 Difference]: Finished difference Result 14359 states and 21427 transitions. [2019-11-06 19:08:23,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-11-06 19:08:23,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 284 [2019-11-06 19:08:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:24,053 INFO L225 Difference]: With dead ends: 14359 [2019-11-06 19:08:24,054 INFO L226 Difference]: Without dead ends: 10600 [2019-11-06 19:08:24,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1213, Invalid=5927, Unknown=0, NotChecked=0, Total=7140 [2019-11-06 19:08:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10600 states. [2019-11-06 19:08:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10600 to 9889. [2019-11-06 19:08:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9889 states. [2019-11-06 19:08:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 13534 transitions. [2019-11-06 19:08:24,429 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 13534 transitions. Word has length 284 [2019-11-06 19:08:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:24,430 INFO L462 AbstractCegarLoop]: Abstraction has 9889 states and 13534 transitions. [2019-11-06 19:08:24,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 19:08:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 13534 transitions. [2019-11-06 19:08:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-11-06 19:08:24,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:24,447 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:24,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:24,652 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash -588146601, now seen corresponding path program 1 times [2019-11-06 19:08:24,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:24,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791639173] [2019-11-06 19:08:24,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:25,129 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791639173] [2019-11-06 19:08:25,130 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239657768] [2019-11-06 19:08:25,130 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 19:08:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:25,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:25,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:25,378 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:25,378 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:08:25,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320558316] [2019-11-06 19:08:25,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:25,379 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:25,380 INFO L87 Difference]: Start difference. First operand 9889 states and 13534 transitions. Second operand 3 states. [2019-11-06 19:08:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:26,528 INFO L93 Difference]: Finished difference Result 22828 states and 31926 transitions. [2019-11-06 19:08:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:26,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 289 [2019-11-06 19:08:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:26,579 INFO L225 Difference]: With dead ends: 22828 [2019-11-06 19:08:26,579 INFO L226 Difference]: Without dead ends: 13323 [2019-11-06 19:08:26,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13323 states. [2019-11-06 19:08:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13323 to 11805. [2019-11-06 19:08:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11805 states. [2019-11-06 19:08:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 15835 transitions. [2019-11-06 19:08:26,980 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 15835 transitions. Word has length 289 [2019-11-06 19:08:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:26,981 INFO L462 AbstractCegarLoop]: Abstraction has 11805 states and 15835 transitions. [2019-11-06 19:08:26,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 15835 transitions. [2019-11-06 19:08:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-11-06 19:08:27,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:27,009 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:27,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:27,214 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash -247122996, now seen corresponding path program 1 times [2019-11-06 19:08:27,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:27,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148712379] [2019-11-06 19:08:27,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 342 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 19:08:27,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148712379] [2019-11-06 19:08:27,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300386541] [2019-11-06 19:08:27,585 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 19:08:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:27,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:27,834 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:27,835 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:08:27,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628795189] [2019-11-06 19:08:27,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:27,837 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:27,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:27,844 INFO L87 Difference]: Start difference. First operand 11805 states and 15835 transitions. Second operand 8 states. [2019-11-06 19:08:28,224 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 6