/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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:17:15,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:17:15,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:17:15,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:17:15,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:17:15,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:17:15,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:17:15,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:17:15,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:17:15,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:17:15,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:17:15,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:17:15,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:17:15,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:17:15,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:17:15,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:17:15,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:17:15,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:17:15,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:17:15,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:17:15,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:17:15,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:17:15,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:17:15,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:17:15,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:17:15,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:17:15,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:17:15,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:17:15,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:17:15,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:17:15,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:17:15,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:17:15,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:17:15,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:17:15,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:17:15,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:17:15,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:17:15,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:17:15,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:17:15,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:17:15,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:17:15,825 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 20:17:15,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:17:15,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:17:15,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:17:15,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:17:15,861 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:17:15,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:17:15,862 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:17:15,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:17:15,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:17:15,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:17:15,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:17:15,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:17:15,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:17:15,865 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:17:15,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:17:15,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:17:15,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:17:15,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:17:15,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:17:15,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:17:15,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:17:15,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:17:15,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:17:15,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:17:15,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:17:15,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:17:15,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:17:15,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:17:15,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:17:15,868 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 20:17:16,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:17:16,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:17:16,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:17:16,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:17:16,170 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:17:16,170 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:17:16,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/874acbc99/8fed9b664248404db0790bd54805141b/FLAGb2e74498a [2020-10-12 20:17:16,768 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:17:16,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:17:16,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/874acbc99/8fed9b664248404db0790bd54805141b/FLAGb2e74498a [2020-10-12 20:17:17,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/874acbc99/8fed9b664248404db0790bd54805141b [2020-10-12 20:17:17,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:17:17,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:17:17,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:17:17,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:17:17,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:17:17,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b2c62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17, skipping insertion in model container [2020-10-12 20:17:17,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:17:17,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:17:17,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:17:17,596 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:17:17,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:17:17,696 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:17:17,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17 WrapperNode [2020-10-12 20:17:17,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:17:17,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:17:17,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:17:17,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:17:17,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (1/1) ... [2020-10-12 20:17:17,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:17:17,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:17:17,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:17:17,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:17:17,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (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 20:17:17,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:17:17,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:17:17,839 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:17:17,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:17:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:17:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:17:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:17:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:17:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:17:17,840 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:17:17,840 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:17:17,840 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:17:17,840 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:17:17,840 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:17:17,840 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:17:17,841 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:17:17,841 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:17:17,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:17:17,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:17:17,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:17:18,604 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:17:18,605 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:17:18,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:17:18 BoogieIcfgContainer [2020-10-12 20:17:18,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:17:18,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:17:18,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:17:18,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:17:18,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:17:17" (1/3) ... [2020-10-12 20:17:18,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f060198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:17:18, skipping insertion in model container [2020-10-12 20:17:18,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:17:17" (2/3) ... [2020-10-12 20:17:18,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f060198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:17:18, skipping insertion in model container [2020-10-12 20:17:18,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:17:18" (3/3) ... [2020-10-12 20:17:18,620 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:17:18,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:17:18,639 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:17:18,655 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:17:18,682 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:17:18,682 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:17:18,683 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:17:18,683 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:17:18,683 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:17:18,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:17:18,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:17:18,684 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:17:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-12 20:17:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:17:18,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:18,722 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] [2020-10-12 20:17:18,723 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-12 20:17:18,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:18,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171305031] [2020-10-12 20:17:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:19,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:19,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:19,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:19,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:21,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:21,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:17:21,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:17:21,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2034 [2020-10-12 20:17:21,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:17:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:17:21,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:17:21,587 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:21,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:21,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:21,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:21,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:21,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 20:17:21,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:21,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:21,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:21,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:21,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:17:21,696 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 20:17:21,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171305031] [2020-10-12 20:17:21,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:21,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:17:21,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054671538] [2020-10-12 20:17:21,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:17:21,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:17:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:17:21,740 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-12 20:17:22,249 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 20:17:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:23,426 INFO L93 Difference]: Finished difference Result 712 states and 1188 transitions. [2020-10-12 20:17:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:17:23,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:17:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:23,448 INFO L225 Difference]: With dead ends: 712 [2020-10-12 20:17:23,448 INFO L226 Difference]: Without dead ends: 595 [2020-10-12 20:17:23,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:17:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-12 20:17:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 237. [2020-10-12 20:17:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 20:17:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 374 transitions. [2020-10-12 20:17:23,529 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 374 transitions. Word has length 66 [2020-10-12 20:17:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:23,530 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 374 transitions. [2020-10-12 20:17:23,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:17:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 374 transitions. [2020-10-12 20:17:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:17:23,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:23,534 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] [2020-10-12 20:17:23,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:17:23,535 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:23,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1268134624, now seen corresponding path program 1 times [2020-10-12 20:17:23,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:23,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076544050] [2020-10-12 20:17:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:23,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:23,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:24,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:25,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:25,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:17:25,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:17:25,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2356 [2020-10-12 20:17:25,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:17:25,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:17:25,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:17:25,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:17:26,221 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:26,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:26,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:26,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:26,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:26,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:17:26,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:26,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:26,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:26,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 20:17:26,264 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 20:17:26,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076544050] [2020-10-12 20:17:26,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:26,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:17:26,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980443840] [2020-10-12 20:17:26,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:17:26,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:17:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:17:26,269 INFO L87 Difference]: Start difference. First operand 237 states and 374 transitions. Second operand 7 states. [2020-10-12 20:17:26,536 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:17:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:27,756 INFO L93 Difference]: Finished difference Result 1483 states and 2442 transitions. [2020-10-12 20:17:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:17:27,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:17:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:27,764 INFO L225 Difference]: With dead ends: 1483 [2020-10-12 20:17:27,764 INFO L226 Difference]: Without dead ends: 1307 [2020-10-12 20:17:27,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:17:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-12 20:17:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 694. [2020-10-12 20:17:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-12 20:17:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1133 transitions. [2020-10-12 20:17:27,837 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1133 transitions. Word has length 67 [2020-10-12 20:17:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:27,839 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1133 transitions. [2020-10-12 20:17:27,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:17:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1133 transitions. [2020-10-12 20:17:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:17:27,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:27,847 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] [2020-10-12 20:17:27,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:17:27,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash -714520107, now seen corresponding path program 1 times [2020-10-12 20:17:27,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:27,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055009241] [2020-10-12 20:17:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:27,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:29,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:29,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:17:29,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:17:29,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1896 [2020-10-12 20:17:29,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:17:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:29,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:17:29,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:30,007 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:30,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:30,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:30,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:30,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:30,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:17:30,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:30,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:30,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:30,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:17:30,050 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 20:17:30,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055009241] [2020-10-12 20:17:30,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:30,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:17:30,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644462721] [2020-10-12 20:17:30,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:17:30,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:17:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:17:30,055 INFO L87 Difference]: Start difference. First operand 694 states and 1133 transitions. Second operand 7 states. [2020-10-12 20:17:30,351 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:17:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:31,648 INFO L93 Difference]: Finished difference Result 4276 states and 7063 transitions. [2020-10-12 20:17:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:17:31,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:17:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:31,671 INFO L225 Difference]: With dead ends: 4276 [2020-10-12 20:17:31,671 INFO L226 Difference]: Without dead ends: 3699 [2020-10-12 20:17:31,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:17:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2020-10-12 20:17:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 1998. [2020-10-12 20:17:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1998 states. [2020-10-12 20:17:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3285 transitions. [2020-10-12 20:17:31,845 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3285 transitions. Word has length 68 [2020-10-12 20:17:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:31,846 INFO L479 AbstractCegarLoop]: Abstraction has 1998 states and 3285 transitions. [2020-10-12 20:17:31,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:17:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3285 transitions. [2020-10-12 20:17:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:17:31,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:31,849 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] [2020-10-12 20:17:31,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:17:31,849 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -727781241, now seen corresponding path program 1 times [2020-10-12 20:17:31,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:31,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844692877] [2020-10-12 20:17:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:31,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:31,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:33,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:17:33,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:17:33,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1811 [2020-10-12 20:17:33,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:33,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:17:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:17:33,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:33,910 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:33,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:33,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:33,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:17:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:33,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:33,938 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 20:17:33,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844692877] [2020-10-12 20:17:33,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:33,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:17:33,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795583879] [2020-10-12 20:17:33,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:17:33,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:33,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:17:33,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:17:33,941 INFO L87 Difference]: Start difference. First operand 1998 states and 3285 transitions. Second operand 7 states. [2020-10-12 20:17:34,181 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:17:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:35,952 INFO L93 Difference]: Finished difference Result 12171 states and 20062 transitions. [2020-10-12 20:17:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:17:35,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:17:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:36,011 INFO L225 Difference]: With dead ends: 12171 [2020-10-12 20:17:36,011 INFO L226 Difference]: Without dead ends: 10334 [2020-10-12 20:17:36,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:17:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2020-10-12 20:17:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 5593. [2020-10-12 20:17:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5593 states. [2020-10-12 20:17:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5593 states to 5593 states and 9191 transitions. [2020-10-12 20:17:36,415 INFO L78 Accepts]: Start accepts. Automaton has 5593 states and 9191 transitions. Word has length 69 [2020-10-12 20:17:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:36,416 INFO L479 AbstractCegarLoop]: Abstraction has 5593 states and 9191 transitions. [2020-10-12 20:17:36,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:17:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5593 states and 9191 transitions. [2020-10-12 20:17:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:17:36,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:36,418 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] [2020-10-12 20:17:36,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:17:36,418 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2053684873, now seen corresponding path program 1 times [2020-10-12 20:17:36,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:36,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815120062] [2020-10-12 20:17:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:36,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:36,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:36,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:38,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:41,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:41,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:17:41,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:17:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:17:41,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:17:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:17:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:17:41,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:41,689 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:41,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:41,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:41,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:41,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:17:41,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:41,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:41,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:41,718 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 20:17:41,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815120062] [2020-10-12 20:17:41,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:41,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:17:41,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131581036] [2020-10-12 20:17:41,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:17:41,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:17:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:17:41,721 INFO L87 Difference]: Start difference. First operand 5593 states and 9191 transitions. Second operand 6 states. [2020-10-12 20:17:41,937 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:17:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:43,547 INFO L93 Difference]: Finished difference Result 22019 states and 36222 transitions. [2020-10-12 20:17:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:17:43,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:17:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:43,611 INFO L225 Difference]: With dead ends: 22019 [2020-10-12 20:17:43,611 INFO L226 Difference]: Without dead ends: 16588 [2020-10-12 20:17:43,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:17:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16588 states. [2020-10-12 20:17:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16588 to 10757. [2020-10-12 20:17:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10757 states. [2020-10-12 20:17:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10757 states to 10757 states and 17648 transitions. [2020-10-12 20:17:44,443 INFO L78 Accepts]: Start accepts. Automaton has 10757 states and 17648 transitions. Word has length 70 [2020-10-12 20:17:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:44,445 INFO L479 AbstractCegarLoop]: Abstraction has 10757 states and 17648 transitions. [2020-10-12 20:17:44,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:17:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10757 states and 17648 transitions. [2020-10-12 20:17:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:17:44,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:44,447 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] [2020-10-12 20:17:44,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:17:44,447 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -990936345, now seen corresponding path program 1 times [2020-10-12 20:17:44,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:44,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462711345] [2020-10-12 20:17:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:44,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:49,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:49,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:17:49,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:17:49,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:17:49,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:49,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:17:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:17:49,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:17:49,690 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:49,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:49,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:49,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:49,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:49,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:17:49,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:49,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:49,718 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 20:17:49,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462711345] [2020-10-12 20:17:49,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:49,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:17:49,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041482537] [2020-10-12 20:17:49,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:17:49,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:49,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:17:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:17:49,720 INFO L87 Difference]: Start difference. First operand 10757 states and 17648 transitions. Second operand 6 states. [2020-10-12 20:17:49,931 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:17:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:51,687 INFO L93 Difference]: Finished difference Result 29469 states and 48327 transitions. [2020-10-12 20:17:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:17:51,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:17:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:51,745 INFO L225 Difference]: With dead ends: 29469 [2020-10-12 20:17:51,746 INFO L226 Difference]: Without dead ends: 23298 [2020-10-12 20:17:51,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:17:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23298 states. [2020-10-12 20:17:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23298 to 17233. [2020-10-12 20:17:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17233 states. [2020-10-12 20:17:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17233 states to 17233 states and 28271 transitions. [2020-10-12 20:17:52,786 INFO L78 Accepts]: Start accepts. Automaton has 17233 states and 28271 transitions. Word has length 70 [2020-10-12 20:17:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:52,787 INFO L479 AbstractCegarLoop]: Abstraction has 17233 states and 28271 transitions. [2020-10-12 20:17:52,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:17:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 17233 states and 28271 transitions. [2020-10-12 20:17:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:17:52,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:52,789 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] [2020-10-12 20:17:52,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:17:52,789 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1998371771, now seen corresponding path program 1 times [2020-10-12 20:17:52,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:52,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499173313] [2020-10-12 20:17:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:52,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:52,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:53,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:53,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:57,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:57,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:17:57,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:17:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:17:57,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:17:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:17:57,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:58,072 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:58,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:58,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:58,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:58,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:58,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:58,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:17:58,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:58,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:17:58,116 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 20:17:58,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499173313] [2020-10-12 20:17:58,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:58,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:17:58,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131922665] [2020-10-12 20:17:58,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:17:58,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:17:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:17:58,119 INFO L87 Difference]: Start difference. First operand 17233 states and 28271 transitions. Second operand 6 states. [2020-10-12 20:17:58,419 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:18:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:00,038 INFO L93 Difference]: Finished difference Result 33695 states and 55260 transitions. [2020-10-12 20:18:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:18:00,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:18:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:00,105 INFO L225 Difference]: With dead ends: 33695 [2020-10-12 20:18:00,106 INFO L226 Difference]: Without dead ends: 27524 [2020-10-12 20:18:00,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:18:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27524 states. [2020-10-12 20:18:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27524 to 21525. [2020-10-12 20:18:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21525 states. [2020-10-12 20:18:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21525 states to 21525 states and 35313 transitions. [2020-10-12 20:18:01,414 INFO L78 Accepts]: Start accepts. Automaton has 21525 states and 35313 transitions. Word has length 70 [2020-10-12 20:18:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:01,415 INFO L479 AbstractCegarLoop]: Abstraction has 21525 states and 35313 transitions. [2020-10-12 20:18:01,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:18:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 21525 states and 35313 transitions. [2020-10-12 20:18:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:18:01,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:01,416 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] [2020-10-12 20:18:01,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:18:01,417 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1536201620, now seen corresponding path program 1 times [2020-10-12 20:18:01,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:01,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758334669] [2020-10-12 20:18:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:01,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:01,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:01,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:01,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:04,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:06,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:18:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:18:06,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:06,795 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:06,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:06,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:06,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:06,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:18:06,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:06,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:06,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:06,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:06,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:06,836 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 20:18:06,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758334669] [2020-10-12 20:18:06,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:06,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:18:06,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110683066] [2020-10-12 20:18:06,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:18:06,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:18:06,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:18:06,843 INFO L87 Difference]: Start difference. First operand 21525 states and 35313 transitions. Second operand 5 states. [2020-10-12 20:18:07,069 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-12 20:18:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:10,477 INFO L93 Difference]: Finished difference Result 75606 states and 123826 transitions. [2020-10-12 20:18:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:18:10,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-12 20:18:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:10,607 INFO L225 Difference]: With dead ends: 75606 [2020-10-12 20:18:10,608 INFO L226 Difference]: Without dead ends: 54933 [2020-10-12 20:18:10,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54933 states. [2020-10-12 20:18:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54933 to 42143. [2020-10-12 20:18:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42143 states. [2020-10-12 20:18:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42143 states to 42143 states and 68937 transitions. [2020-10-12 20:18:13,025 INFO L78 Accepts]: Start accepts. Automaton has 42143 states and 68937 transitions. Word has length 71 [2020-10-12 20:18:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:13,025 INFO L479 AbstractCegarLoop]: Abstraction has 42143 states and 68937 transitions. [2020-10-12 20:18:13,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:18:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 42143 states and 68937 transitions. [2020-10-12 20:18:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:18:13,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:13,026 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] [2020-10-12 20:18:13,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:18:13,027 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash -715866073, now seen corresponding path program 1 times [2020-10-12 20:18:13,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:13,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497100449] [2020-10-12 20:18:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:13,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:14,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:15,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:18,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:18,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:18:18,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:18,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-12 20:18:18,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:18:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 20:18:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:18:18,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:18,529 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:18,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:18,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:18,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:18,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:18,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:18:18,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:18,552 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 20:18:18,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497100449] [2020-10-12 20:18:18,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:18,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:18:18,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140822071] [2020-10-12 20:18:18,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:18:18,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:18:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:18,555 INFO L87 Difference]: Start difference. First operand 42143 states and 68937 transitions. Second operand 7 states. [2020-10-12 20:18:18,773 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:18:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:23,189 INFO L93 Difference]: Finished difference Result 87654 states and 143442 transitions. [2020-10-12 20:18:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:18:23,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 20:18:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:23,287 INFO L225 Difference]: With dead ends: 87654 [2020-10-12 20:18:23,287 INFO L226 Difference]: Without dead ends: 67093 [2020-10-12 20:18:23,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:18:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67093 states. [2020-10-12 20:18:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67093 to 52857. [2020-10-12 20:18:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52857 states. [2020-10-12 20:18:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52857 states to 52857 states and 86490 transitions. [2020-10-12 20:18:26,282 INFO L78 Accepts]: Start accepts. Automaton has 52857 states and 86490 transitions. Word has length 71 [2020-10-12 20:18:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:26,283 INFO L479 AbstractCegarLoop]: Abstraction has 52857 states and 86490 transitions. [2020-10-12 20:18:26,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:18:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 52857 states and 86490 transitions. [2020-10-12 20:18:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:18:26,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:26,284 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] [2020-10-12 20:18:26,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:18:26,284 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash -807738537, now seen corresponding path program 1 times [2020-10-12 20:18:26,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:26,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184184506] [2020-10-12 20:18:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:18:26,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:18:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-12 20:18:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:18:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:18:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:27,158 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:27,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:27,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:27,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:27,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:27,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:18:27,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:27,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:27,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:18:27,205 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 20:18:27,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184184506] [2020-10-12 20:18:27,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:27,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:18:27,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036383172] [2020-10-12 20:18:27,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:18:27,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:18:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:27,212 INFO L87 Difference]: Start difference. First operand 52857 states and 86490 transitions. Second operand 6 states. [2020-10-12 20:18:27,456 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-12 20:18:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:33,047 INFO L93 Difference]: Finished difference Result 116491 states and 190626 transitions. [2020-10-12 20:18:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:18:33,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:18:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:33,133 INFO L225 Difference]: With dead ends: 116491 [2020-10-12 20:18:33,133 INFO L226 Difference]: Without dead ends: 63824 [2020-10-12 20:18:33,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:18:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63824 states. [2020-10-12 20:18:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63824 to 52857. [2020-10-12 20:18:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52857 states. [2020-10-12 20:18:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52857 states to 52857 states and 86386 transitions. [2020-10-12 20:18:36,126 INFO L78 Accepts]: Start accepts. Automaton has 52857 states and 86386 transitions. Word has length 71 [2020-10-12 20:18:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:36,126 INFO L479 AbstractCegarLoop]: Abstraction has 52857 states and 86386 transitions. [2020-10-12 20:18:36,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:18:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 52857 states and 86386 transitions. [2020-10-12 20:18:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:18:36,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:36,127 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] [2020-10-12 20:18:36,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:18:36,127 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1881593207, now seen corresponding path program 1 times [2020-10-12 20:18:36,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:36,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285386050] [2020-10-12 20:18:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:36,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:37,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:37,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:41,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:41,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:18:41,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:41,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:18:41,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:41,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:18:41,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:18:41,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:18:41,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:41,367 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:41,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:41,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:41,390 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 20:18:41,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285386050] [2020-10-12 20:18:41,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:41,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:18:41,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007347522] [2020-10-12 20:18:41,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:18:41,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:18:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:41,392 INFO L87 Difference]: Start difference. First operand 52857 states and 86386 transitions. Second operand 7 states. [2020-10-12 20:18:41,597 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:18:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:46,418 INFO L93 Difference]: Finished difference Result 94537 states and 154527 transitions. [2020-10-12 20:18:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:18:46,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 20:18:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:46,518 INFO L225 Difference]: With dead ends: 94537 [2020-10-12 20:18:46,518 INFO L226 Difference]: Without dead ends: 74052 [2020-10-12 20:18:46,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:18:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74052 states. [2020-10-12 20:18:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74052 to 60300. [2020-10-12 20:18:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60300 states. [2020-10-12 20:18:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60300 states to 60300 states and 98561 transitions. [2020-10-12 20:18:51,703 INFO L78 Accepts]: Start accepts. Automaton has 60300 states and 98561 transitions. Word has length 71 [2020-10-12 20:18:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:51,703 INFO L479 AbstractCegarLoop]: Abstraction has 60300 states and 98561 transitions. [2020-10-12 20:18:51,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:18:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 60300 states and 98561 transitions. [2020-10-12 20:18:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:18:51,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:51,705 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] [2020-10-12 20:18:51,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:18:51,705 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -579982883, now seen corresponding path program 1 times [2020-10-12 20:18:51,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:51,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642743807] [2020-10-12 20:18:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:51,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:51,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:51,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:52,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:54,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:56,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:56,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:18:56,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:56,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:18:56,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:18:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 20:18:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:18:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:56,968 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:56,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:56,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:56,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:56,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:56,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:56,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:18:56,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:56,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:56,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:56,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:56,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:56,990 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 20:18:56,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642743807] [2020-10-12 20:18:56,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:56,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:18:56,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882997578] [2020-10-12 20:18:56,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:18:56,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:18:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:18:56,993 INFO L87 Difference]: Start difference. First operand 60300 states and 98561 transitions. Second operand 5 states. [2020-10-12 20:18:57,219 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-12 20:19:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:07,196 INFO L93 Difference]: Finished difference Result 220976 states and 360494 transitions. [2020-10-12 20:19:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:19:07,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:19:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:07,434 INFO L225 Difference]: With dead ends: 220976 [2020-10-12 20:19:07,435 INFO L226 Difference]: Without dead ends: 162256 [2020-10-12 20:19:07,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 20:19:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162256 states. [2020-10-12 20:19:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162256 to 118830. [2020-10-12 20:19:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118830 states. [2020-10-12 20:19:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118830 states to 118830 states and 193605 transitions. [2020-10-12 20:19:18,101 INFO L78 Accepts]: Start accepts. Automaton has 118830 states and 193605 transitions. Word has length 72 [2020-10-12 20:19:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:18,102 INFO L479 AbstractCegarLoop]: Abstraction has 118830 states and 193605 transitions. [2020-10-12 20:19:18,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:19:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 118830 states and 193605 transitions. [2020-10-12 20:19:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:19:18,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:18,103 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] [2020-10-12 20:19:18,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:19:18,104 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash -511424921, now seen corresponding path program 1 times [2020-10-12 20:19:18,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:18,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375939073] [2020-10-12 20:19:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:18,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:18,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:18,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:18,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:18,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:18,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:18,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:19:18,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:18,650 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:18,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:18,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:18,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:18,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:18,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:18,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:19:18,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:18,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:18,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:18,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:18,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:18,669 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 20:19:18,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375939073] [2020-10-12 20:19:18,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:18,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:19:18,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946053126] [2020-10-12 20:19:18,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:19:18,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:19:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:19:18,670 INFO L87 Difference]: Start difference. First operand 118830 states and 193605 transitions. Second operand 4 states. [2020-10-12 20:19:18,866 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:19:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:34,175 INFO L93 Difference]: Finished difference Result 317185 states and 515154 transitions. [2020-10-12 20:19:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:19:34,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-12 20:19:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:34,473 INFO L225 Difference]: With dead ends: 317185 [2020-10-12 20:19:34,473 INFO L226 Difference]: Without dead ends: 198479 [2020-10-12 20:19:34,563 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 20:19:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198479 states. [2020-10-12 20:19:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198479 to 198477. [2020-10-12 20:19:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198477 states. [2020-10-12 20:19:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198477 states to 198477 states and 319139 transitions. [2020-10-12 20:19:50,207 INFO L78 Accepts]: Start accepts. Automaton has 198477 states and 319139 transitions. Word has length 72 [2020-10-12 20:19:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:50,207 INFO L479 AbstractCegarLoop]: Abstraction has 198477 states and 319139 transitions. [2020-10-12 20:19:50,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:19:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 198477 states and 319139 transitions. [2020-10-12 20:19:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:19:50,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:50,209 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] [2020-10-12 20:19:50,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:19:50,209 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1049951795, now seen corresponding path program 1 times [2020-10-12 20:19:50,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:50,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988786193] [2020-10-12 20:19:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:50,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:50,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:50,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:50,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:50,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:52,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:52,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:55,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:19:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:55,445 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:55,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:55,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:55,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:55,464 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 20:19:55,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988786193] [2020-10-12 20:19:55,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:55,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:19:55,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330539583] [2020-10-12 20:19:55,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:19:55,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:19:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:19:55,465 INFO L87 Difference]: Start difference. First operand 198477 states and 319139 transitions. Second operand 7 states. [2020-10-12 20:19:55,690 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:20:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:21,164 INFO L93 Difference]: Finished difference Result 408752 states and 657613 transitions. [2020-10-12 20:20:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:20:21,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-12 20:20:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:21,647 INFO L225 Difference]: With dead ends: 408752 [2020-10-12 20:20:21,647 INFO L226 Difference]: Without dead ends: 316385 [2020-10-12 20:20:21,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:20:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316385 states. [2020-10-12 20:20:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316385 to 238364. [2020-10-12 20:20:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238364 states. [2020-10-12 20:20:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238364 states to 238364 states and 383287 transitions. [2020-10-12 20:20:43,991 INFO L78 Accepts]: Start accepts. Automaton has 238364 states and 383287 transitions. Word has length 74 [2020-10-12 20:20:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:43,992 INFO L479 AbstractCegarLoop]: Abstraction has 238364 states and 383287 transitions. [2020-10-12 20:20:43,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:20:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 238364 states and 383287 transitions. [2020-10-12 20:20:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:20:43,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:43,993 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] [2020-10-12 20:20:43,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:20:43,993 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash 105068887, now seen corresponding path program 1 times [2020-10-12 20:20:43,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:43,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834918402] [2020-10-12 20:20:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:44,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:45,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:46,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:46,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:20:46,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:20:46,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-12 20:20:46,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:20:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:20:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 20:20:46,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:47,018 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:47,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:47,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:47,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:47,041 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 20:20:47,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834918402] [2020-10-12 20:20:47,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:47,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:20:47,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151130348] [2020-10-12 20:20:47,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:20:47,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:20:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:20:47,043 INFO L87 Difference]: Start difference. First operand 238364 states and 383287 transitions. Second operand 5 states. [2020-10-12 20:20:47,255 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 174