/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:22,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:22,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:22,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:57:22,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:22,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:22,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:22,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:22,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:22,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:22,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:22,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:22,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:22,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:22,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:22,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:22,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:22,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:22,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:22,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:22,510 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 22:57:22,523 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:22,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:22,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:22,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:22,525 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:22,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:22,526 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:22,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:22,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:22,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:22,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:22,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:22,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:22,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:22,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:22,527 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:22,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:22,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:22,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:22,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:22,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:22,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:22,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:22,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:22,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:22,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:22,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:22,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:22,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:57:22,846 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:22,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:22,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:22,873 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:22,873 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:22,874 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-11-06 22:57:22,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e7d71fa/bfc58cad2e364f7097a636072872f620/FLAG71d60939b [2019-11-06 22:57:23,681 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:23,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-11-06 22:57:23,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e7d71fa/bfc58cad2e364f7097a636072872f620/FLAG71d60939b [2019-11-06 22:57:23,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e7d71fa/bfc58cad2e364f7097a636072872f620 [2019-11-06 22:57:23,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:23,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:23,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:23,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:23,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:23,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a23c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23, skipping insertion in model container [2019-11-06 22:57:23,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,881 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:24,000 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:25,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:25,283 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:25,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:25,823 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:25,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25 WrapperNode [2019-11-06 22:57:25,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:25,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:25,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:25,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:25,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:25,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:25,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:25,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:25,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:26,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:26,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:26,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:26,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:26,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:26,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:26,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (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 22:57:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:29,721 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:29,721 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:29,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:29 BoogieIcfgContainer [2019-11-06 22:57:29,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:29,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:29,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:29,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:29,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:23" (1/3) ... [2019-11-06 22:57:29,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59190015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:29, skipping insertion in model container [2019-11-06 22:57:29,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25" (2/3) ... [2019-11-06 22:57:29,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59190015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:29, skipping insertion in model container [2019-11-06 22:57:29,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:29" (3/3) ... [2019-11-06 22:57:29,744 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label26.c [2019-11-06 22:57:29,755 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:29,765 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:29,776 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:29,818 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:29,818 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:29,818 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:29,819 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:29,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:29,819 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:29,819 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:29,819 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 22:57:29,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:29,877 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] [2019-11-06 22:57:29,879 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash 835114033, now seen corresponding path program 1 times [2019-11-06 22:57:29,894 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:29,894 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407298249] [2019-11-06 22:57:29,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:30,328 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 22:57:30,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407298249] [2019-11-06 22:57:30,330 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:30,330 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:57:30,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87601112] [2019-11-06 22:57:30,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:57:30,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:57:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:30,356 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:57:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:34,686 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:57:34,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:57:34,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-11-06 22:57:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:34,723 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:57:34,723 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:57:34,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:57:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:57:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:57:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:57:34,929 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 68 [2019-11-06 22:57:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:34,930 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:57:34,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:57:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:57:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:57:34,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:34,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:34,938 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash 506598757, now seen corresponding path program 1 times [2019-11-06 22:57:34,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:34,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70412621] [2019-11-06 22:57:34,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:35,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70412621] [2019-11-06 22:57:35,164 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:35,164 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:35,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354297551] [2019-11-06 22:57:35,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:35,167 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:35,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:35,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:35,168 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:57:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:40,258 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-11-06 22:57:40,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:40,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-06 22:57:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:40,277 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:57:40,278 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:57:40,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:40,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:57:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-11-06 22:57:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:57:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4749 transitions. [2019-11-06 22:57:40,369 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4749 transitions. Word has length 141 [2019-11-06 22:57:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:40,370 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4749 transitions. [2019-11-06 22:57:40,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4749 transitions. [2019-11-06 22:57:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:57:40,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:40,374 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, 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 22:57:40,375 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash 288076576, now seen corresponding path program 1 times [2019-11-06 22:57:40,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:40,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229698631] [2019-11-06 22:57:40,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:40,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229698631] [2019-11-06 22:57:40,492 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:40,492 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:57:40,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477406722] [2019-11-06 22:57:40,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:40,493 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:40,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:57:40,494 INFO L87 Difference]: Start difference. First operand 2864 states and 4749 transitions. Second operand 5 states. [2019-11-06 22:57:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:46,460 INFO L93 Difference]: Finished difference Result 8754 states and 14707 transitions. [2019-11-06 22:57:46,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:57:46,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2019-11-06 22:57:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:46,495 INFO L225 Difference]: With dead ends: 8754 [2019-11-06 22:57:46,495 INFO L226 Difference]: Without dead ends: 5896 [2019-11-06 22:57:46,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:57:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2019-11-06 22:57:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 5815. [2019-11-06 22:57:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5815 states. [2019-11-06 22:57:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 8477 transitions. [2019-11-06 22:57:46,715 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 8477 transitions. Word has length 144 [2019-11-06 22:57:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:46,715 INFO L462 AbstractCegarLoop]: Abstraction has 5815 states and 8477 transitions. [2019-11-06 22:57:46,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:57:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 8477 transitions. [2019-11-06 22:57:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 22:57:46,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:46,722 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:46,722 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash 647429316, now seen corresponding path program 1 times [2019-11-06 22:57:46,723 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:46,723 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024296127] [2019-11-06 22:57:46,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:46,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024296127] [2019-11-06 22:57:46,901 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:46,901 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:57:46,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976608049] [2019-11-06 22:57:46,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:57:46,902 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:57:46,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:46,903 INFO L87 Difference]: Start difference. First operand 5815 states and 8477 transitions. Second operand 4 states. [2019-11-06 22:57:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:53,290 INFO L93 Difference]: Finished difference Result 20913 states and 32003 transitions. [2019-11-06 22:57:53,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:57:53,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-11-06 22:57:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:53,374 INFO L225 Difference]: With dead ends: 20913 [2019-11-06 22:57:53,374 INFO L226 Difference]: Without dead ends: 15104 [2019-11-06 22:57:53,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15104 states. [2019-11-06 22:57:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15104 to 15099. [2019-11-06 22:57:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15099 states. [2019-11-06 22:57:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15099 states to 15099 states and 21133 transitions. [2019-11-06 22:57:53,917 INFO L78 Accepts]: Start accepts. Automaton has 15099 states and 21133 transitions. Word has length 174 [2019-11-06 22:57:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:53,921 INFO L462 AbstractCegarLoop]: Abstraction has 15099 states and 21133 transitions. [2019-11-06 22:57:53,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:57:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 15099 states and 21133 transitions. [2019-11-06 22:57:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-11-06 22:57:53,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:53,939 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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:53,939 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash -138076367, now seen corresponding path program 1 times [2019-11-06 22:57:53,940 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:53,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581234149] [2019-11-06 22:57:53,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 183 proven. 191 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 22:57:54,374 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581234149] [2019-11-06 22:57:54,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44281223] [2019-11-06 22:57:54,375 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 22:57:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:54,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:57:54,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-11-06 22:57:54,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 183 proven. 191 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 22:57:55,248 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:57:55,248 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-11-06 22:57:55,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581113379] [2019-11-06 22:57:55,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:55,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:55,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:57:55,253 INFO L87 Difference]: Start difference. First operand 15099 states and 21133 transitions. Second operand 5 states.