/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:13:22,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:13:22,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:13:22,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:13:22,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:13:22,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:13:22,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:13:22,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:13:22,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:13:22,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:13:22,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:13:22,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:13:22,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:13:22,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:13:22,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:13:22,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:13:22,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:13:22,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:13:22,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:13:22,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:13:22,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:13:22,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:13:22,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:13:22,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:13:22,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:13:22,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:13:22,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:13:22,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:13:22,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:13:22,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:13:22,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:13:22,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:13:22,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:13:22,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:13:22,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:13:22,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:13:22,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:13:22,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:13:22,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:13:22,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:13:22,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:13:22,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:13:22,792 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:13:22,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:13:22,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:13:22,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:13:22,794 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:13:22,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:13:22,794 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:13:22,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:13:22,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:13:22,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:13:22,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:13:22,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:13:22,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:13:22,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:13:22,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:13:22,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:13:22,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:13:22,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:13:22,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:13:22,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:13:22,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:13:22,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:13:22,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:13:22,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:13:22,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:13:22,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:13:22,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:13:22,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:13:22,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:13:22,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:13:23,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:13:23,130 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:13:23,134 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:13:23,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:13:23,136 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:13:23,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:13:23,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebcfbb78e/e26c57e8355448498ca19e9bb99d427f/FLAGad2988e05 [2020-10-12 20:13:23,706 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:13:23,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:13:23,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebcfbb78e/e26c57e8355448498ca19e9bb99d427f/FLAGad2988e05 [2020-10-12 20:13:23,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebcfbb78e/e26c57e8355448498ca19e9bb99d427f [2020-10-12 20:13:24,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:13:24,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:13:24,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:13:24,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:13:24,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:13:24,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:13:23" (1/1) ... [2020-10-12 20:13:24,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71011ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24, skipping insertion in model container [2020-10-12 20:13:24,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:13:23" (1/1) ... [2020-10-12 20:13:24,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:13:24,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:13:24,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:13:24,479 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:13:24,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:13:24,621 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:13:24,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24 WrapperNode [2020-10-12 20:13:24,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:13:24,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:13:24,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:13:24,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:13:24,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... [2020-10-12 20:13:24,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:13:24,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:13:24,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:13:24,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:13:24,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 20:13:24,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:13:24,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:13:24,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:13:24,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:13:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:13:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:13:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:13:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:13:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:13:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:13:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:13:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:13:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:13:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:13:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:13:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:13:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:13:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 20:13:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-12 20:13:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:13:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:13:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:13:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:13:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:13:25,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:13:25,664 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:13:25,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:13:25 BoogieIcfgContainer [2020-10-12 20:13:25,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:13:25,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:13:25,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:13:25,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:13:25,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:13:23" (1/3) ... [2020-10-12 20:13:25,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295dec43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:13:25, skipping insertion in model container [2020-10-12 20:13:25,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:24" (2/3) ... [2020-10-12 20:13:25,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295dec43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:13:25, skipping insertion in model container [2020-10-12 20:13:25,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:13:25" (3/3) ... [2020-10-12 20:13:25,680 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:13:25,692 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:13:25,701 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:13:25,716 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:13:25,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:13:25,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:13:25,746 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:13:25,746 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:13:25,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:13:25,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:13:25,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:13:25,747 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:13:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-12 20:13:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:13:25,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:25,787 INFO L422 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:25,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 548589956, now seen corresponding path program 1 times [2020-10-12 20:13:25,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:25,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412403876] [2020-10-12 20:13:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:26,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:26,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:27,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:31,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:31,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:13:31,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:13:31,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 20:13:31,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:31,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:13:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:13:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 20:13:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:13:31,749 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:31,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:31,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:31,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:31,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:31,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:31,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:13:31,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:31,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:31,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412403876] [2020-10-12 20:13:31,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:31,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 20:13:31,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293523619] [2020-10-12 20:13:31,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:13:31,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:13:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:13:31,832 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 9 states. [2020-10-12 20:13:32,221 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-12 20:13:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:33,676 INFO L93 Difference]: Finished difference Result 1024 states and 1626 transitions. [2020-10-12 20:13:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 20:13:33,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-12 20:13:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:33,700 INFO L225 Difference]: With dead ends: 1024 [2020-10-12 20:13:33,700 INFO L226 Difference]: Without dead ends: 874 [2020-10-12 20:13:33,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:13:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-10-12 20:13:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 282. [2020-10-12 20:13:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 20:13:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 421 transitions. [2020-10-12 20:13:33,781 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 421 transitions. Word has length 78 [2020-10-12 20:13:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:33,781 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 421 transitions. [2020-10-12 20:13:33,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:13:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 421 transitions. [2020-10-12 20:13:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 20:13:33,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:33,786 INFO L422 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:33,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:13:33,787 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash -192113215, now seen corresponding path program 1 times [2020-10-12 20:13:33,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:33,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819247046] [2020-10-12 20:13:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:33,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:34,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:37,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:37,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 20:13:37,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:13:37,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3971 [2020-10-12 20:13:37,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:13:37,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 20:13:37,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:13:37,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:38,136 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:38,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:38,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:38,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:38,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:38,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 20:13:38,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:38,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:38,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819247046] [2020-10-12 20:13:38,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:38,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:13:38,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524918744] [2020-10-12 20:13:38,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:13:38,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:13:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:38,195 INFO L87 Difference]: Start difference. First operand 282 states and 421 transitions. Second operand 5 states. [2020-10-12 20:13:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:39,300 INFO L93 Difference]: Finished difference Result 520 states and 798 transitions. [2020-10-12 20:13:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:13:39,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-12 20:13:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:39,304 INFO L225 Difference]: With dead ends: 520 [2020-10-12 20:13:39,304 INFO L226 Difference]: Without dead ends: 518 [2020-10-12 20:13:39,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:13:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-10-12 20:13:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 286. [2020-10-12 20:13:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 20:13:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2020-10-12 20:13:39,328 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 79 [2020-10-12 20:13:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:39,329 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2020-10-12 20:13:39,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:13:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2020-10-12 20:13:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 20:13:39,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:39,332 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:39,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:13:39,332 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1650922541, now seen corresponding path program 1 times [2020-10-12 20:13:39,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:39,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51183754] [2020-10-12 20:13:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:39,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:39,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:40,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:42,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:42,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 20:13:42,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:13:42,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-10-12 20:13:42,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:42,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:13:42,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 20:13:42,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 20:13:42,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:42,213 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:42,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:42,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:42,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:42,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:13:42,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:42,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:42,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:42,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:42,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:42,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51183754] [2020-10-12 20:13:42,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:42,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:13:42,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223716537] [2020-10-12 20:13:42,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:13:42,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:13:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:13:42,277 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand 4 states. [2020-10-12 20:13:42,516 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:13:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:43,254 INFO L93 Difference]: Finished difference Result 730 states and 1127 transitions. [2020-10-12 20:13:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:13:43,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-12 20:13:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:43,259 INFO L225 Difference]: With dead ends: 730 [2020-10-12 20:13:43,259 INFO L226 Difference]: Without dead ends: 492 [2020-10-12 20:13:43,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-12 20:13:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2020-10-12 20:13:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-12 20:13:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 747 transitions. [2020-10-12 20:13:43,295 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 747 transitions. Word has length 80 [2020-10-12 20:13:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:43,296 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 747 transitions. [2020-10-12 20:13:43,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:13:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 747 transitions. [2020-10-12 20:13:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:13:43,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:43,298 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:43,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:13:43,299 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash 155498538, now seen corresponding path program 1 times [2020-10-12 20:13:43,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:43,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747907917] [2020-10-12 20:13:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:43,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:43,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:44,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:44,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:13:44,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-12 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 20:13:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 20:13:44,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:44,825 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:44,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:44,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:44,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:44,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:44,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:44,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:13:44,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:44,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:44,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747907917] [2020-10-12 20:13:44,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:44,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:13:44,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678380927] [2020-10-12 20:13:44,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:13:44,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:13:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:13:44,865 INFO L87 Difference]: Start difference. First operand 490 states and 747 transitions. Second operand 4 states. [2020-10-12 20:13:45,102 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:13:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:46,023 INFO L93 Difference]: Finished difference Result 1310 states and 2041 transitions. [2020-10-12 20:13:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:13:46,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-12 20:13:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:46,031 INFO L225 Difference]: With dead ends: 1310 [2020-10-12 20:13:46,032 INFO L226 Difference]: Without dead ends: 868 [2020-10-12 20:13:46,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2020-10-12 20:13:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 866. [2020-10-12 20:13:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2020-10-12 20:13:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1337 transitions. [2020-10-12 20:13:46,115 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1337 transitions. Word has length 81 [2020-10-12 20:13:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:46,115 INFO L479 AbstractCegarLoop]: Abstraction has 866 states and 1337 transitions. [2020-10-12 20:13:46,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:13:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1337 transitions. [2020-10-12 20:13:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 20:13:46,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:46,117 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:46,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:13:46,118 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:46,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2044165063, now seen corresponding path program 1 times [2020-10-12 20:13:46,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:46,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814961786] [2020-10-12 20:13:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:46,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:46,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:46,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:46,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 20:13:46,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:13:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-12 20:13:46,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:46,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:13:46,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 20:13:46,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 20:13:46,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:47,068 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:47,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:47,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:47,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:47,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:47,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:13:47,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:47,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:47,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:47,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:47,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:47,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814961786] [2020-10-12 20:13:47,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:47,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:13:47,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885484523] [2020-10-12 20:13:47,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:13:47,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:47,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:13:47,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:13:47,108 INFO L87 Difference]: Start difference. First operand 866 states and 1337 transitions. Second operand 4 states. [2020-10-12 20:13:47,305 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:13:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:48,186 INFO L93 Difference]: Finished difference Result 2374 states and 3707 transitions. [2020-10-12 20:13:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:13:48,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-12 20:13:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:48,195 INFO L225 Difference]: With dead ends: 2374 [2020-10-12 20:13:48,196 INFO L226 Difference]: Without dead ends: 1556 [2020-10-12 20:13:48,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2020-10-12 20:13:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1554. [2020-10-12 20:13:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-12 20:13:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2409 transitions. [2020-10-12 20:13:48,317 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2409 transitions. Word has length 82 [2020-10-12 20:13:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:48,318 INFO L479 AbstractCegarLoop]: Abstraction has 1554 states and 2409 transitions. [2020-10-12 20:13:48,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:13:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2409 transitions. [2020-10-12 20:13:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 20:13:48,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:48,329 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:48,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:13:48,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:48,332 INFO L82 PathProgramCache]: Analyzing trace with hash -441988331, now seen corresponding path program 1 times [2020-10-12 20:13:48,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:48,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365594791] [2020-10-12 20:13:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:48,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:48,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:48,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:48,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 20:13:48,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:13:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-12 20:13:48,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:13:48,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:13:48,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:13:48,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:13:48,965 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:48,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:48,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:48,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:48,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:48,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:48,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:13:48,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:48,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:48,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:48,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:49,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365594791] [2020-10-12 20:13:49,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:49,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:13:49,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513880585] [2020-10-12 20:13:49,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:13:49,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:13:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:13:49,012 INFO L87 Difference]: Start difference. First operand 1554 states and 2409 transitions. Second operand 4 states. [2020-10-12 20:13:49,218 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:13:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:50,251 INFO L93 Difference]: Finished difference Result 4310 states and 6715 transitions. [2020-10-12 20:13:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:13:50,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-12 20:13:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:50,266 INFO L225 Difference]: With dead ends: 4310 [2020-10-12 20:13:50,267 INFO L226 Difference]: Without dead ends: 2804 [2020-10-12 20:13:50,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2020-10-12 20:13:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2802. [2020-10-12 20:13:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2020-10-12 20:13:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4337 transitions. [2020-10-12 20:13:50,433 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4337 transitions. Word has length 83 [2020-10-12 20:13:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:50,434 INFO L479 AbstractCegarLoop]: Abstraction has 2802 states and 4337 transitions. [2020-10-12 20:13:50,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:13:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4337 transitions. [2020-10-12 20:13:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 20:13:50,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:50,435 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:50,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:13:50,436 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1685972911, now seen corresponding path program 1 times [2020-10-12 20:13:50,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:50,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677991765] [2020-10-12 20:13:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:50,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:50,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 20:13:50,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:13:50,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-12 20:13:50,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:50,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:13:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:13:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 20:13:50,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:50,873 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:50,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:50,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:50,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:50,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:50,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:13:50,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:50,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:13:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:50,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677991765] [2020-10-12 20:13:50,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:50,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:13:50,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738855321] [2020-10-12 20:13:50,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:13:50,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:13:50,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:13:50,940 INFO L87 Difference]: Start difference. First operand 2802 states and 4337 transitions. Second operand 4 states. [2020-10-12 20:13:51,225 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:13:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:52,338 INFO L93 Difference]: Finished difference Result 8086 states and 12531 transitions. [2020-10-12 20:13:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:13:52,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-12 20:13:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:52,369 INFO L225 Difference]: With dead ends: 8086 [2020-10-12 20:13:52,370 INFO L226 Difference]: Without dead ends: 5332 [2020-10-12 20:13:52,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5332 states. [2020-10-12 20:13:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5332 to 5298. [2020-10-12 20:13:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5298 states. [2020-10-12 20:13:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 8145 transitions. [2020-10-12 20:13:52,751 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 8145 transitions. Word has length 84 [2020-10-12 20:13:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:52,752 INFO L479 AbstractCegarLoop]: Abstraction has 5298 states and 8145 transitions. [2020-10-12 20:13:52,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:13:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 8145 transitions. [2020-10-12 20:13:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:13:52,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:52,754 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:52,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:13:52,754 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1060547273, now seen corresponding path program 1 times [2020-10-12 20:13:52,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:52,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661082613] [2020-10-12 20:13:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:53,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:53,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:13:53,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:13:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-12 20:13:53,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:13:53,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:13:53,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 20:13:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:13:53,660 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:53,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:53,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:53,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:53,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:13:53,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:53,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:53,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661082613] [2020-10-12 20:13:53,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:53,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:13:53,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340824649] [2020-10-12 20:13:53,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:13:53,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:53,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:13:53,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:13:53,711 INFO L87 Difference]: Start difference. First operand 5298 states and 8145 transitions. Second operand 5 states. [2020-10-12 20:13:53,954 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-12 20:13:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:55,493 INFO L93 Difference]: Finished difference Result 10776 states and 16660 transitions. [2020-10-12 20:13:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:13:55,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-12 20:13:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:55,530 INFO L225 Difference]: With dead ends: 10776 [2020-10-12 20:13:55,531 INFO L226 Difference]: Without dead ends: 8022 [2020-10-12 20:13:55,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:13:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2020-10-12 20:13:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 7986. [2020-10-12 20:13:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7986 states. [2020-10-12 20:13:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 12273 transitions. [2020-10-12 20:13:55,992 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 12273 transitions. Word has length 85 [2020-10-12 20:13:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:55,993 INFO L479 AbstractCegarLoop]: Abstraction has 7986 states and 12273 transitions. [2020-10-12 20:13:55,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:13:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 12273 transitions. [2020-10-12 20:13:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:13:55,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:55,994 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:55,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:13:55,995 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:55,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1704535055, now seen corresponding path program 1 times [2020-10-12 20:13:55,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:55,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706427175] [2020-10-12 20:13:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:56,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:57,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:57,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:13:57,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:13:57,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1411 [2020-10-12 20:13:57,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:57,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:13:57,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:13:57,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 20:13:57,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:57,680 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:57,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:57,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:57,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:57,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:57,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:57,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:13:57,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:57,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:13:57,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706427175] [2020-10-12 20:13:57,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:57,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 20:13:57,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562197419] [2020-10-12 20:13:57,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:13:57,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:13:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:13:57,724 INFO L87 Difference]: Start difference. First operand 7986 states and 12273 transitions. Second operand 9 states. [2020-10-12 20:13:57,963 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:14:00,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:00,403 INFO L93 Difference]: Finished difference Result 48364 states and 75025 transitions. [2020-10-12 20:14:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:14:00,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-12 20:14:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:00,523 INFO L225 Difference]: With dead ends: 48364 [2020-10-12 20:14:00,523 INFO L226 Difference]: Without dead ends: 44362 [2020-10-12 20:14:00,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:14:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44362 states. [2020-10-12 20:14:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44362 to 15698. [2020-10-12 20:14:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15698 states. [2020-10-12 20:14:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15698 states to 15698 states and 24177 transitions. [2020-10-12 20:14:01,686 INFO L78 Accepts]: Start accepts. Automaton has 15698 states and 24177 transitions. Word has length 85 [2020-10-12 20:14:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:01,686 INFO L479 AbstractCegarLoop]: Abstraction has 15698 states and 24177 transitions. [2020-10-12 20:14:01,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15698 states and 24177 transitions. [2020-10-12 20:14:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:14:01,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:01,688 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:01,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:14:01,689 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash 523929480, now seen corresponding path program 1 times [2020-10-12 20:14:01,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:01,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882735280] [2020-10-12 20:14:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:01,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:01,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:02,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:05,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:05,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:14:05,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:05,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4152 [2020-10-12 20:14:05,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:05,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 20:14:05,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 20:14:05,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:06,131 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:06,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:06,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:06,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:06,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:06,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:14:06,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:14:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:06,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882735280] [2020-10-12 20:14:06,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:06,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 20:14:06,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880068060] [2020-10-12 20:14:06,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:06,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:06,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:06,189 INFO L87 Difference]: Start difference. First operand 15698 states and 24177 transitions. Second operand 9 states. [2020-10-12 20:14:06,441 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:14:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:09,549 INFO L93 Difference]: Finished difference Result 58748 states and 90769 transitions. [2020-10-12 20:14:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:14:09,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-10-12 20:14:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:09,675 INFO L225 Difference]: With dead ends: 58748 [2020-10-12 20:14:09,675 INFO L226 Difference]: Without dead ends: 53610 [2020-10-12 20:14:09,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:14:09,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53610 states. [2020-10-12 20:14:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53610 to 18322. [2020-10-12 20:14:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18322 states. [2020-10-12 20:14:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18322 states to 18322 states and 28209 transitions. [2020-10-12 20:14:11,062 INFO L78 Accepts]: Start accepts. Automaton has 18322 states and 28209 transitions. Word has length 86 [2020-10-12 20:14:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:11,063 INFO L479 AbstractCegarLoop]: Abstraction has 18322 states and 28209 transitions. [2020-10-12 20:14:11,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 18322 states and 28209 transitions. [2020-10-12 20:14:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 20:14:11,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:11,065 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:11,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:14:11,065 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1724703671, now seen corresponding path program 1 times [2020-10-12 20:14:11,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:11,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605020915] [2020-10-12 20:14:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:15,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:15,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 20:14:15,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:15,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4335 [2020-10-12 20:14:15,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:14:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 20:14:15,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:14:15,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:15,714 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:15,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:15,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:15,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:15,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:14:15,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:15,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:14:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:15,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605020915] [2020-10-12 20:14:15,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:15,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:14:15,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995206630] [2020-10-12 20:14:15,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:14:15,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:14:15,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:14:15,774 INFO L87 Difference]: Start difference. First operand 18322 states and 28209 transitions. Second operand 8 states. [2020-10-12 20:14:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:19,640 INFO L93 Difference]: Finished difference Result 38373 states and 58622 transitions. [2020-10-12 20:14:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:14:19,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-12 20:14:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:19,705 INFO L225 Difference]: With dead ends: 38373 [2020-10-12 20:14:19,705 INFO L226 Difference]: Without dead ends: 33235 [2020-10-12 20:14:19,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33235 states. [2020-10-12 20:14:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33235 to 18337. [2020-10-12 20:14:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18337 states. [2020-10-12 20:14:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 28233 transitions. [2020-10-12 20:14:21,546 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 28233 transitions. Word has length 89 [2020-10-12 20:14:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:21,546 INFO L479 AbstractCegarLoop]: Abstraction has 18337 states and 28233 transitions. [2020-10-12 20:14:21,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:14:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 28233 transitions. [2020-10-12 20:14:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 20:14:21,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:21,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:21,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:14:21,557 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 826984051, now seen corresponding path program 1 times [2020-10-12 20:14:21,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:21,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98548571] [2020-10-12 20:14:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:21,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:23,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:26,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 20:14:26,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:26,884 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:26,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:26,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:26,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:26,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:26,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:14:26,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:14:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 20:14:26,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98548571] [2020-10-12 20:14:26,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:26,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:26,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973920811] [2020-10-12 20:14:26,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:26,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:26,994 INFO L87 Difference]: Start difference. First operand 18337 states and 28233 transitions. Second operand 9 states. [2020-10-12 20:14:27,265 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:14:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:31,317 INFO L93 Difference]: Finished difference Result 63499 states and 98024 transitions. [2020-10-12 20:14:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:14:31,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2020-10-12 20:14:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:31,395 INFO L225 Difference]: With dead ends: 63499 [2020-10-12 20:14:31,395 INFO L226 Difference]: Without dead ends: 55721 [2020-10-12 20:14:31,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:14:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55721 states. [2020-10-12 20:14:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55721 to 22273. [2020-10-12 20:14:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22273 states. [2020-10-12 20:14:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22273 states to 22273 states and 34281 transitions. [2020-10-12 20:14:33,087 INFO L78 Accepts]: Start accepts. Automaton has 22273 states and 34281 transitions. Word has length 115 [2020-10-12 20:14:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:33,088 INFO L479 AbstractCegarLoop]: Abstraction has 22273 states and 34281 transitions. [2020-10-12 20:14:33,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22273 states and 34281 transitions. [2020-10-12 20:14:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 20:14:33,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:33,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:33,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:14:33,100 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash -67200600, now seen corresponding path program 1 times [2020-10-12 20:14:33,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:33,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383859166] [2020-10-12 20:14:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:33,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:38,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:14:38,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 20:14:38,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:38,370 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:38,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:38,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:38,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:38,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:14:38,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:38,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 20:14:38,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383859166] [2020-10-12 20:14:38,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:38,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:38,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810288725] [2020-10-12 20:14:38,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:38,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:38,414 INFO L87 Difference]: Start difference. First operand 22273 states and 34281 transitions. Second operand 9 states. [2020-10-12 20:14:38,670 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:14:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:43,385 INFO L93 Difference]: Finished difference Result 67987 states and 104888 transitions. [2020-10-12 20:14:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:14:43,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2020-10-12 20:14:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:43,452 INFO L225 Difference]: With dead ends: 67987 [2020-10-12 20:14:43,452 INFO L226 Difference]: Without dead ends: 60209 [2020-10-12 20:14:43,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:14:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60209 states. [2020-10-12 20:14:45,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60209 to 26209. [2020-10-12 20:14:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26209 states. [2020-10-12 20:14:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26209 states to 26209 states and 40329 transitions. [2020-10-12 20:14:45,542 INFO L78 Accepts]: Start accepts. Automaton has 26209 states and 40329 transitions. Word has length 115 [2020-10-12 20:14:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:45,542 INFO L479 AbstractCegarLoop]: Abstraction has 26209 states and 40329 transitions. [2020-10-12 20:14:45,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 26209 states and 40329 transitions. [2020-10-12 20:14:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 20:14:45,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:45,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:45,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:14:45,554 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1545651449, now seen corresponding path program 1 times [2020-10-12 20:14:45,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:45,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931132479] [2020-10-12 20:14:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:45,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:50,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 20:14:50,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:14:50,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:14:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 20:14:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:50,853 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:50,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:50,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:50,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:14:50,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:50,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 20:14:50,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931132479] [2020-10-12 20:14:50,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:50,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:50,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955261126] [2020-10-12 20:14:50,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:50,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:50,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:50,902 INFO L87 Difference]: Start difference. First operand 26209 states and 40329 transitions. Second operand 9 states. [2020-10-12 20:14:51,239 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:14:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:56,770 INFO L93 Difference]: Finished difference Result 72235 states and 111380 transitions. [2020-10-12 20:14:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:14:56,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2020-10-12 20:14:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:56,844 INFO L225 Difference]: With dead ends: 72235 [2020-10-12 20:14:56,844 INFO L226 Difference]: Without dead ends: 64457 [2020-10-12 20:14:56,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:14:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64457 states. [2020-10-12 20:15:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64457 to 30145. [2020-10-12 20:15:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30145 states. [2020-10-12 20:15:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30145 states to 30145 states and 46377 transitions. [2020-10-12 20:15:00,179 INFO L78 Accepts]: Start accepts. Automaton has 30145 states and 46377 transitions. Word has length 115 [2020-10-12 20:15:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:00,180 INFO L479 AbstractCegarLoop]: Abstraction has 30145 states and 46377 transitions. [2020-10-12 20:15:00,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:15:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30145 states and 46377 transitions. [2020-10-12 20:15:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 20:15:00,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:00,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:15:00,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:15:00,189 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2032487280, now seen corresponding path program 1 times [2020-10-12 20:15:00,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:00,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329232579] [2020-10-12 20:15:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:00,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:15:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:15:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 20:15:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:05,476 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:05,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:05,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:05,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 20:15:05,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329232579] [2020-10-12 20:15:05,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:15:05,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:15:05,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426968056] [2020-10-12 20:15:05,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:15:05,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:15:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:15:05,512 INFO L87 Difference]: Start difference. First operand 30145 states and 46377 transitions. Second operand 9 states. [2020-10-12 20:15:05,775 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:15:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:11,675 INFO L93 Difference]: Finished difference Result 76087 states and 117268 transitions. [2020-10-12 20:15:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:15:11,676 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2020-10-12 20:15:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:11,746 INFO L225 Difference]: With dead ends: 76087 [2020-10-12 20:15:11,747 INFO L226 Difference]: Without dead ends: 68309 [2020-10-12 20:15:11,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:15:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68309 states. [2020-10-12 20:15:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68309 to 34081. [2020-10-12 20:15:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34081 states. [2020-10-12 20:15:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34081 states to 34081 states and 52425 transitions. [2020-10-12 20:15:14,594 INFO L78 Accepts]: Start accepts. Automaton has 34081 states and 52425 transitions. Word has length 115 [2020-10-12 20:15:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:14,595 INFO L479 AbstractCegarLoop]: Abstraction has 34081 states and 52425 transitions. [2020-10-12 20:15:14,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:15:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34081 states and 52425 transitions. [2020-10-12 20:15:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:15:14,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:14,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:15:14,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:15:14,603 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2146708202, now seen corresponding path program 1 times [2020-10-12 20:15:14,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:14,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733245157] [2020-10-12 20:15:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:14,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:14,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:15:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 20:15:16,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:16,531 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:16,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:16,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:16,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:15:16,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:16,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733245157] [2020-10-12 20:15:16,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:15:16,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 20:15:16,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645638464] [2020-10-12 20:15:16,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:16,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:16,584 INFO L87 Difference]: Start difference. First operand 34081 states and 52425 transitions. Second operand 6 states. [2020-10-12 20:15:16,807 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:15:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:21,435 INFO L93 Difference]: Finished difference Result 58489 states and 90349 transitions. [2020-10-12 20:15:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:15:21,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-10-12 20:15:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:21,489 INFO L225 Difference]: With dead ends: 58489 [2020-10-12 20:15:21,489 INFO L226 Difference]: Without dead ends: 46167 [2020-10-12 20:15:21,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46167 states. [2020-10-12 20:15:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46167 to 46017. [2020-10-12 20:15:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46017 states. [2020-10-12 20:15:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46017 states to 46017 states and 70729 transitions. [2020-10-12 20:15:25,943 INFO L78 Accepts]: Start accepts. Automaton has 46017 states and 70729 transitions. Word has length 116 [2020-10-12 20:15:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:25,943 INFO L479 AbstractCegarLoop]: Abstraction has 46017 states and 70729 transitions. [2020-10-12 20:15:25,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 46017 states and 70729 transitions. [2020-10-12 20:15:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 20:15:25,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:25,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:15:25,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:15:25,953 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 646278534, now seen corresponding path program 1 times [2020-10-12 20:15:25,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:25,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829196953] [2020-10-12 20:15:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:25,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:30,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:30,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 20:15:30,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:15:30,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 20:15:30,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:15:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:15:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 20:15:30,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:31,222 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:31,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:31,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:31,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:31,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829196953] [2020-10-12 20:15:31,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:15:31,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:15:31,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173229907] [2020-10-12 20:15:31,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:15:31,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:15:31,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:15:31,252 INFO L87 Difference]: Start difference. First operand 46017 states and 70729 transitions. Second operand 9 states. [2020-10-12 20:15:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:38,524 INFO L93 Difference]: Finished difference Result 78636 states and 120657 transitions. [2020-10-12 20:15:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:38,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-12 20:15:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:38,591 INFO L225 Difference]: With dead ends: 78636 [2020-10-12 20:15:38,591 INFO L226 Difference]: Without dead ends: 68218 [2020-10-12 20:15:38,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:15:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68218 states. [2020-10-12 20:15:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68218 to 46319. [2020-10-12 20:15:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46319 states. [2020-10-12 20:15:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46319 states to 46319 states and 71192 transitions. [2020-10-12 20:15:42,443 INFO L78 Accepts]: Start accepts. Automaton has 46319 states and 71192 transitions. Word has length 118 [2020-10-12 20:15:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:42,443 INFO L479 AbstractCegarLoop]: Abstraction has 46319 states and 71192 transitions. [2020-10-12 20:15:42,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:15:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46319 states and 71192 transitions. [2020-10-12 20:15:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 20:15:42,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:42,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:15:42,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 20:15:42,452 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash -247906117, now seen corresponding path program 1 times [2020-10-12 20:15:42,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:42,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014339527] [2020-10-12 20:15:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:42,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:42,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:42,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:42,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:42,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:42,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:47,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 20:15:47,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:15:47,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:15:47,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:47,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:15:47,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 20:15:47,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 20:15:47,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:47,746 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:47,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:47,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:47,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:47,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:47,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:47,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:47,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:47,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014339527] [2020-10-12 20:15:47,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:15:47,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:15:47,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108300945] [2020-10-12 20:15:47,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:15:47,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:15:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:15:47,777 INFO L87 Difference]: Start difference. First operand 46319 states and 71192 transitions. Second operand 9 states. [2020-10-12 20:15:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:55,750 INFO L93 Difference]: Finished difference Result 78937 states and 121119 transitions. [2020-10-12 20:15:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:55,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-12 20:15:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:55,828 INFO L225 Difference]: With dead ends: 78937 [2020-10-12 20:15:55,828 INFO L226 Difference]: Without dead ends: 68519 [2020-10-12 20:15:55,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:15:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68519 states. [2020-10-12 20:15:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68519 to 46691. [2020-10-12 20:15:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46691 states. [2020-10-12 20:15:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46691 states to 46691 states and 71767 transitions. [2020-10-12 20:16:00,000 INFO L78 Accepts]: Start accepts. Automaton has 46691 states and 71767 transitions. Word has length 118 [2020-10-12 20:16:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:00,000 INFO L479 AbstractCegarLoop]: Abstraction has 46691 states and 71767 transitions. [2020-10-12 20:16:00,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:16:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 46691 states and 71767 transitions. [2020-10-12 20:16:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 20:16:00,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:00,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:00,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 20:16:00,010 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1726356966, now seen corresponding path program 1 times [2020-10-12 20:16:00,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:00,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329299789] [2020-10-12 20:16:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:00,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:03,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:03,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:16:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 20:16:05,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:16:05,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:05,289 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:05,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:05,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:05,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329299789] [2020-10-12 20:16:05,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:16:05,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:16:05,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736557523] [2020-10-12 20:16:05,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:16:05,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:05,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:16:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:16:05,323 INFO L87 Difference]: Start difference. First operand 46691 states and 71767 transitions. Second operand 9 states. [2020-10-12 20:16:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:13,612 INFO L93 Difference]: Finished difference Result 79833 states and 122529 transitions. [2020-10-12 20:16:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:16:13,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-12 20:16:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:13,694 INFO L225 Difference]: With dead ends: 79833 [2020-10-12 20:16:13,694 INFO L226 Difference]: Without dead ends: 69415 [2020-10-12 20:16:13,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:16:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69415 states. [2020-10-12 20:16:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69415 to 47637. [2020-10-12 20:16:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47637 states. [2020-10-12 20:16:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47637 states to 47637 states and 73253 transitions. [2020-10-12 20:16:18,180 INFO L78 Accepts]: Start accepts. Automaton has 47637 states and 73253 transitions. Word has length 118 [2020-10-12 20:16:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:18,180 INFO L479 AbstractCegarLoop]: Abstraction has 47637 states and 73253 transitions. [2020-10-12 20:16:18,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:16:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 47637 states and 73253 transitions. [2020-10-12 20:16:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 20:16:18,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:18,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:18,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 20:16:18,191 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:18,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2081774499, now seen corresponding path program 1 times [2020-10-12 20:16:18,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:18,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674950048] [2020-10-12 20:16:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:18,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:19,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:23,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:23,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 20:16:23,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:16:23,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:16:23,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:23,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:16:23,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-12 20:16:23,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 20:16:23,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:23,454 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:23,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:23,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:23,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:23,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:23,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674950048] [2020-10-12 20:16:23,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:16:23,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:16:23,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403538314] [2020-10-12 20:16:23,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:16:23,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:16:23,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:16:23,485 INFO L87 Difference]: Start difference. First operand 47637 states and 73253 transitions. Second operand 9 states. [2020-10-12 20:16:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:32,011 INFO L93 Difference]: Finished difference Result 82029 states and 126021 transitions. [2020-10-12 20:16:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:16:32,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-12 20:16:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:32,088 INFO L225 Difference]: With dead ends: 82029 [2020-10-12 20:16:32,088 INFO L226 Difference]: Without dead ends: 71611 [2020-10-12 20:16:32,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:16:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71611 states. [2020-10-12 20:16:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71611 to 49967. [2020-10-12 20:16:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49967 states. [2020-10-12 20:16:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49967 states to 49967 states and 76953 transitions. [2020-10-12 20:16:36,930 INFO L78 Accepts]: Start accepts. Automaton has 49967 states and 76953 transitions. Word has length 118 [2020-10-12 20:16:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:36,931 INFO L479 AbstractCegarLoop]: Abstraction has 49967 states and 76953 transitions. [2020-10-12 20:16:36,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:16:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 49967 states and 76953 transitions. [2020-10-12 20:16:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 20:16:36,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:36,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:36,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 20:16:36,947 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1912532280, now seen corresponding path program 2 times [2020-10-12 20:16:36,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:36,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677171680] [2020-10-12 20:16:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:36,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:38,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:41,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:41,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 20:16:41,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:16:41,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:16:41,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:16:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:16:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 20:16:41,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:42,223 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:42,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:42,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:42,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:42,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:42,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:16:42,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:42,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:42,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677171680] [2020-10-12 20:16:42,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:16:42,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:16:42,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620208896] [2020-10-12 20:16:42,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:16:42,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:16:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:16:42,268 INFO L87 Difference]: Start difference. First operand 49967 states and 76953 transitions. Second operand 9 states. [2020-10-12 20:17:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:08,398 INFO L93 Difference]: Finished difference Result 250607 states and 384690 transitions. [2020-10-12 20:17:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 20:17:08,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-12 20:17:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:08,718 INFO L225 Difference]: With dead ends: 250607 [2020-10-12 20:17:08,718 INFO L226 Difference]: Without dead ends: 240189 [2020-10-12 20:17:08,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-12 20:17:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240189 states.