/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=NARROWEST --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/array-tiling/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:22:16,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:22:16,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:22:16,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:22:16,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:22:16,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:22:16,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:22:16,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:22:16,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:22:16,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:22:16,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:22:16,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:22:16,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:22:16,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:22:16,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:22:16,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:22:16,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:22:16,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:22:16,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:22:16,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:22:16,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:22:16,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:22:16,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:22:16,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:22:16,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:22:16,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:22:16,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:22:16,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:22:16,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:22:16,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:22:16,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:22:16,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:22:16,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:22:16,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:22:16,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:22:16,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:22:16,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:22:16,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:22:16,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:22:16,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:22:16,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:22:16,799 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 [2020-10-13 05:22:16,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:22:16,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:22:16,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:22:16,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:22:16,824 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:22:16,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:22:16,824 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:22:16,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:22:16,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:22:16,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:22:16,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:22:16,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:22:16,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:22:16,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:22:16,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:22:16,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:22:16,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:22:16,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:22:16,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:22:16,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:22:16,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:22:16,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:22:16,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:22:16,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:22:16,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:22:16,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:22:16,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:22:16,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:22:16,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:22:16,829 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:22:17,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:22:17,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:22:17,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:22:17,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:22:17,176 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:22:17,177 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2020-10-13 05:22:17,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5772fa68b/8b4644256347420a90e604cf3d23475d/FLAG4ae2c62dc [2020-10-13 05:22:17,666 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:22:17,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr5.c [2020-10-13 05:22:17,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5772fa68b/8b4644256347420a90e604cf3d23475d/FLAG4ae2c62dc [2020-10-13 05:22:18,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5772fa68b/8b4644256347420a90e604cf3d23475d [2020-10-13 05:22:18,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:22:18,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:22:18,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:22:18,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:22:18,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:22:18,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18, skipping insertion in model container [2020-10-13 05:22:18,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:22:18,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:22:18,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:22:18,470 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:22:18,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:22:18,664 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:22:18,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18 WrapperNode [2020-10-13 05:22:18,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:22:18,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:22:18,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:22:18,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:22:18,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (1/1) ... [2020-10-13 05:22:18,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:22:18,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:22:18,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:22:18,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:22:18,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (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 [2020-10-13 05:22:18,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:22:18,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:22:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:22:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:22:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:22:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:22:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:22:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:22:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:22:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:22:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:22:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:22:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:22:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:22:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:22:19,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:22:19,340 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 05:22:19,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:22:19 BoogieIcfgContainer [2020-10-13 05:22:19,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:22:19,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:22:19,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:22:19,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:22:19,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:22:18" (1/3) ... [2020-10-13 05:22:19,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a251ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:22:19, skipping insertion in model container [2020-10-13 05:22:19,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:22:18" (2/3) ... [2020-10-13 05:22:19,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a251ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:22:19, skipping insertion in model container [2020-10-13 05:22:19,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:22:19" (3/3) ... [2020-10-13 05:22:19,360 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2020-10-13 05:22:19,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:22:19,381 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:22:19,395 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:22:19,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:22:19,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:22:19,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:22:19,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:22:19,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:22:19,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:22:19,431 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:22:19,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:22:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-13 05:22:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:22:19,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:19,468 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] [2020-10-13 05:22:19,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1201829580, now seen corresponding path program 1 times [2020-10-13 05:22:19,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:19,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382855802] [2020-10-13 05:22:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:19,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:19,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:19,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:20,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:20,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:21,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:22:21,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:22:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-10-13 05:22:21,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:22:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:21,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:22:21,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:21,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:21,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:21,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:22:21,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:21,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:21,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:21,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:21,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:21,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:21,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:22:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:21,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:21,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382855802] [2020-10-13 05:22:21,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:22:21,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:22:21,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444363533] [2020-10-13 05:22:21,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:22:21,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:22:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:22:21,397 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-13 05:22:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:21,556 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2020-10-13 05:22:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:22:21,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-13 05:22:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:21,569 INFO L225 Difference]: With dead ends: 101 [2020-10-13 05:22:21,569 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:22:21,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:22:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:22:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 05:22:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:22:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-10-13 05:22:21,630 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 30 [2020-10-13 05:22:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:21,631 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-10-13 05:22:21,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:22:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-10-13 05:22:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:22:21,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:21,633 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] [2020-10-13 05:22:21,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:22:21,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash -692208943, now seen corresponding path program 1 times [2020-10-13 05:22:21,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:21,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742233154] [2020-10-13 05:22:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:21,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:26,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:22:26,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 05:22:26,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:22:26,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:22:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:22:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:22:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:22:26,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:26,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:26,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:26,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:26,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:26,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:26,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:26,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:26,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:26,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:26,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:26,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:26,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742233154] [2020-10-13 05:22:26,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:22:26,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:22:26,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904772490] [2020-10-13 05:22:26,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:22:26,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:22:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:22:26,718 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 6 states. [2020-10-13 05:22:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:26,903 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-13 05:22:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:22:26,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 05:22:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:26,905 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:22:26,905 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 05:22:26,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:22:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 05:22:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 05:22:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:22:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 05:22:26,917 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2020-10-13 05:22:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:26,918 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 05:22:26,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:22:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 05:22:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:22:26,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:26,919 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] [2020-10-13 05:22:26,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:22:26,920 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash -690361901, now seen corresponding path program 1 times [2020-10-13 05:22:26,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:26,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955955457] [2020-10-13 05:22:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:26,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:31,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:31,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:22:31,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:22:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:22:31,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:22:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:22:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:22:31,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:32,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:32,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:32,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:32,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:32,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:32,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:32,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:32,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:32,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:32,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:22:32,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:22:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:22:32,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:32,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955955457] [2020-10-13 05:22:32,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:22:32,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 05:22:32,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393067665] [2020-10-13 05:22:32,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:22:32,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:22:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:22:32,138 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 8 states. [2020-10-13 05:22:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:32,495 INFO L93 Difference]: Finished difference Result 103 states and 131 transitions. [2020-10-13 05:22:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:22:32,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 05:22:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:32,500 INFO L225 Difference]: With dead ends: 103 [2020-10-13 05:22:32,501 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:22:32,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:22:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:22:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-13 05:22:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:22:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-13 05:22:32,536 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2020-10-13 05:22:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:32,537 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-13 05:22:32,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:22:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-13 05:22:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:22:32,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:32,542 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] [2020-10-13 05:22:32,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:22:32,542 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1545957900, now seen corresponding path program 1 times [2020-10-13 05:22:32,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:32,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311531237] [2020-10-13 05:22:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:32,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:33,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:33,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:35,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:37,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:37,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:37,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:37,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:22:37,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:22:37,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 05:22:37,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:37,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:22:37,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:22:37,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:22:37,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:38,220 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2020-10-13 05:22:38,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:38,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:38,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:38,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:38,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:38,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:38,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:38,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:38,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:38,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:38,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:38,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:38,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:38,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:38,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:38,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:22:38,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311531237] [2020-10-13 05:22:38,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:38,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:22:38,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773891425] [2020-10-13 05:22:38,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:22:38,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:38,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:22:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:22:38,703 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 15 states. [2020-10-13 05:22:39,375 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 05:22:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:41,195 INFO L93 Difference]: Finished difference Result 190 states and 245 transitions. [2020-10-13 05:22:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:22:41,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 05:22:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:41,205 INFO L225 Difference]: With dead ends: 190 [2020-10-13 05:22:41,205 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 05:22:41,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 05:22:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 120. [2020-10-13 05:22:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 05:22:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2020-10-13 05:22:41,251 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 50 [2020-10-13 05:22:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:41,255 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2020-10-13 05:22:41,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:22:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2020-10-13 05:22:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:22:41,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:41,259 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] [2020-10-13 05:22:41,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:22:41,259 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:41,260 INFO L82 PathProgramCache]: Analyzing trace with hash 701952398, now seen corresponding path program 1 times [2020-10-13 05:22:41,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:41,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771672481] [2020-10-13 05:22:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:41,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:42,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:42,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:42,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:44,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:44,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:46,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:22:46,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:22:46,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:22:46,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:22:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:22:46,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:46,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:46,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:46,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:46,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:46,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:46,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:46,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:46,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:22:46,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:22:46,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:22:46,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771672481] [2020-10-13 05:22:46,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:22:46,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:22:46,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818144276] [2020-10-13 05:22:46,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:22:46,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:46,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:22:46,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:22:46,331 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 4 states. [2020-10-13 05:22:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:46,467 INFO L93 Difference]: Finished difference Result 202 states and 259 transitions. [2020-10-13 05:22:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:22:46,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-13 05:22:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:46,469 INFO L225 Difference]: With dead ends: 202 [2020-10-13 05:22:46,470 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 05:22:46,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:22:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 05:22:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 05:22:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:22:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2020-10-13 05:22:46,484 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 50 [2020-10-13 05:22:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:46,485 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2020-10-13 05:22:46,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:22:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2020-10-13 05:22:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:22:46,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:46,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:46,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:22:46,487 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:46,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1387692165, now seen corresponding path program 1 times [2020-10-13 05:22:46,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:46,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396127775] [2020-10-13 05:22:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:47,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:48,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:49,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:51,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:51,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:22:51,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:22:51,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:22:51,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:51,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:22:51,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:22:51,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:22:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:51,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:51,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:51,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:51,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:51,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:22:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:51,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:51,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:51,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:51,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:22:51,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:51,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:51,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:51,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:22:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:51,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:22:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:51,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:51,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:51,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:22:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:51,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:22:51,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396127775] [2020-10-13 05:22:51,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:22:51,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:22:51,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087122077] [2020-10-13 05:22:51,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:22:51,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:22:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:22:51,591 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand 4 states. [2020-10-13 05:22:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:51,728 INFO L93 Difference]: Finished difference Result 128 states and 158 transitions. [2020-10-13 05:22:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:22:51,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 05:22:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:51,730 INFO L225 Difference]: With dead ends: 128 [2020-10-13 05:22:51,731 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 05:22:51,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:22:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 05:22:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 05:22:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:22:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2020-10-13 05:22:51,745 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 59 [2020-10-13 05:22:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:51,745 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2020-10-13 05:22:51,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:22:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2020-10-13 05:22:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:22:51,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:51,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:51,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:22:51,748 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2089626681, now seen corresponding path program 1 times [2020-10-13 05:22:51,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:51,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988141031] [2020-10-13 05:22:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:51,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:54,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:54,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:55,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:56,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:22:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:57,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:57,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:57,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:57,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:57,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:57,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:57,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:57,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:57,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:57,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:57,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:22:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:57,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:57,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:57,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:57,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:22:57,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:22:57,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:22:57,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988141031] [2020-10-13 05:22:57,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:57,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:22:57,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004954545] [2020-10-13 05:22:57,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:22:57,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:22:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:22:57,445 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 15 states. [2020-10-13 05:23:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:00,578 INFO L93 Difference]: Finished difference Result 261 states and 331 transitions. [2020-10-13 05:23:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:23:00,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 05:23:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:00,582 INFO L225 Difference]: With dead ends: 261 [2020-10-13 05:23:00,582 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 05:23:00,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 05:23:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 173. [2020-10-13 05:23:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 05:23:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2020-10-13 05:23:00,608 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 59 [2020-10-13 05:23:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:00,609 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2020-10-13 05:23:00,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:23:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2020-10-13 05:23:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:23:00,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:00,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:00,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:23:00,612 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1060267383, now seen corresponding path program 1 times [2020-10-13 05:23:00,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:00,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236577414] [2020-10-13 05:23:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:00,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:01,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:02,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:03,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:03,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:04,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:04,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:23:05,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:23:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:23:05,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:23:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:23:05,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:05,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:05,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:05,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:05,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:05,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:05,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:05,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:05,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:05,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:05,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:23:05,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:05,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:23:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:05,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:23:05,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236577414] [2020-10-13 05:23:05,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:23:05,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:23:05,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569175760] [2020-10-13 05:23:05,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:23:05,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:05,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:23:05,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:23:05,679 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand 4 states. [2020-10-13 05:23:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:05,809 INFO L93 Difference]: Finished difference Result 249 states and 312 transitions. [2020-10-13 05:23:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:23:05,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 05:23:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:05,811 INFO L225 Difference]: With dead ends: 249 [2020-10-13 05:23:05,812 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 05:23:05,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:23:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 05:23:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 05:23:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 05:23:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 155 transitions. [2020-10-13 05:23:05,829 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 155 transitions. Word has length 59 [2020-10-13 05:23:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:05,829 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 155 transitions. [2020-10-13 05:23:05,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:23:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 155 transitions. [2020-10-13 05:23:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:23:05,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:05,831 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:05,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:23:05,832 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1574692846, now seen corresponding path program 2 times [2020-10-13 05:23:05,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:05,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311000671] [2020-10-13 05:23:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:08,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:10,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:10,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:23:10,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:23:10,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:23:10,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:10,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:23:10,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:23:10,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:23:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:11,132 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-13 05:23:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:11,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:11,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:11,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:11,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:11,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:11,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:11,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:23:11,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:11,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:11,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:11,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:11,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:23:11,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:11,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:11,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:23:11,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:23:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:11,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:11,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:11,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:11,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:23:11,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:11,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:11,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:11,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:11,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:23:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:11,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:11,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:11,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:11,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:11,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:11,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:11,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:11,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:11,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:11,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:23:11,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311000671] [2020-10-13 05:23:11,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:11,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:23:11,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581844282] [2020-10-13 05:23:11,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:23:11,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:23:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:23:11,900 INFO L87 Difference]: Start difference. First operand 127 states and 155 transitions. Second operand 17 states. [2020-10-13 05:23:13,166 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-13 05:23:13,873 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-13 05:23:14,069 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 05:23:14,408 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 05:23:14,710 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-13 05:23:14,872 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-13 05:23:15,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-13 05:23:15,188 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-13 05:23:15,491 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-13 05:23:15,660 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-13 05:23:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:17,853 INFO L93 Difference]: Finished difference Result 347 states and 432 transitions. [2020-10-13 05:23:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:23:17,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 05:23:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:17,858 INFO L225 Difference]: With dead ends: 347 [2020-10-13 05:23:17,858 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 05:23:17,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=529, Invalid=2551, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:23:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 05:23:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 169. [2020-10-13 05:23:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 05:23:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2020-10-13 05:23:17,902 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 68 [2020-10-13 05:23:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:17,902 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2020-10-13 05:23:17,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:23:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2020-10-13 05:23:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:23:17,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:17,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:17,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:23:17,904 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1998339568, now seen corresponding path program 1 times [2020-10-13 05:23:17,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:17,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637623095] [2020-10-13 05:23:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:18,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:19,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:23:22,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:23:22,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:23:22,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:23:22,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:23:22,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:22,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:22,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:22,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:22,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:23:22,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:22,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:22,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:23:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:22,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:22,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:22,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:22,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:23:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:22,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:22,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 05:23:22,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637623095] [2020-10-13 05:23:22,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:23:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:23:22,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860200261] [2020-10-13 05:23:22,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:23:22,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:23:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:23:22,985 INFO L87 Difference]: Start difference. First operand 169 states and 209 transitions. Second operand 4 states. [2020-10-13 05:23:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:23,130 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2020-10-13 05:23:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:23:23,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-13 05:23:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:23,132 INFO L225 Difference]: With dead ends: 265 [2020-10-13 05:23:23,133 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 05:23:23,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:23:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 05:23:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-13 05:23:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 05:23:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 171 transitions. [2020-10-13 05:23:23,157 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 171 transitions. Word has length 68 [2020-10-13 05:23:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:23,158 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 171 transitions. [2020-10-13 05:23:23,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:23:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 171 transitions. [2020-10-13 05:23:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:23:23,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:23,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:23,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:23:23,161 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1947894876, now seen corresponding path program 1 times [2020-10-13 05:23:23,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:23,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782660813] [2020-10-13 05:23:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:23,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:28,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:28,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:23:28,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:23:28,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:23:28,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:28,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:23:28,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:23:28,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:23:28,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:28,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:28,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:28,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:28,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:28,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:23:28,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:28,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:28,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:23:28,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:28,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:28,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:28,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:28,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:28,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:23:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:23:28,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782660813] [2020-10-13 05:23:28,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:28,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:23:28,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991347305] [2020-10-13 05:23:28,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:23:28,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:23:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:23:28,381 INFO L87 Difference]: Start difference. First operand 143 states and 171 transitions. Second operand 8 states. [2020-10-13 05:23:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:29,091 INFO L93 Difference]: Finished difference Result 283 states and 338 transitions. [2020-10-13 05:23:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:23:29,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-13 05:23:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:29,094 INFO L225 Difference]: With dead ends: 283 [2020-10-13 05:23:29,094 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 05:23:29,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:23:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 05:23:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2020-10-13 05:23:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:23:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2020-10-13 05:23:29,114 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 66 [2020-10-13 05:23:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:29,115 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2020-10-13 05:23:29,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:23:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2020-10-13 05:23:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:23:29,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:29,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:29,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:23:29,116 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1454776887, now seen corresponding path program 2 times [2020-10-13 05:23:29,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:29,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40157997] [2020-10-13 05:23:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:29,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:32,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:33,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:33,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:23:34,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:23:34,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5243 [2020-10-13 05:23:34,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:23:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:23:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 05:23:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:23:36,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:36,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:36,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:36,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:36,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:36,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:36,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:36,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:36,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:36,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:36,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:36,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:36,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:36,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:23:36,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40157997] [2020-10-13 05:23:36,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:36,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:23:36,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906804174] [2020-10-13 05:23:36,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:23:36,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:23:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:23:36,873 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 17 states. [2020-10-13 05:23:39,952 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 05:23:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:40,984 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2020-10-13 05:23:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:23:40,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-13 05:23:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:40,988 INFO L225 Difference]: With dead ends: 271 [2020-10-13 05:23:40,989 INFO L226 Difference]: Without dead ends: 255 [2020-10-13 05:23:40,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:23:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-13 05:23:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2020-10-13 05:23:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 05:23:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2020-10-13 05:23:41,016 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 70 [2020-10-13 05:23:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:41,016 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2020-10-13 05:23:41,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:23:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2020-10-13 05:23:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:23:41,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:41,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:41,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:23:41,018 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1910278105, now seen corresponding path program 3 times [2020-10-13 05:23:41,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:41,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672647660] [2020-10-13 05:23:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:41,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:42,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:23:46,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:23:46,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:23:46,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:23:46,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:23:46,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:23:46,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,311 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-13 05:23:46,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:46,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:46,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:46,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:46,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:46,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:46,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:46,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:46,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:23:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:46,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:23:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:46,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:46,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:46,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:46,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 05:23:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:46,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:46,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:46,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:46,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:46,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:46,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:46,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:23:46,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672647660] [2020-10-13 05:23:46,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:46,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:23:46,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15399437] [2020-10-13 05:23:46,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:23:46,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:23:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:23:46,801 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand 16 states. [2020-10-13 05:23:47,396 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 05:23:47,575 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-13 05:23:47,768 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-13 05:23:47,971 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-13 05:23:48,192 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-13 05:23:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:49,481 INFO L93 Difference]: Finished difference Result 301 states and 358 transitions. [2020-10-13 05:23:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:23:49,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-13 05:23:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:49,485 INFO L225 Difference]: With dead ends: 301 [2020-10-13 05:23:49,485 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 05:23:49,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:23:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 05:23:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 237. [2020-10-13 05:23:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 05:23:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 280 transitions. [2020-10-13 05:23:49,522 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 280 transitions. Word has length 77 [2020-10-13 05:23:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:49,523 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 280 transitions. [2020-10-13 05:23:49,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:23:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 280 transitions. [2020-10-13 05:23:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:23:49,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:49,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:49,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:23:49,525 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:49,525 INFO L82 PathProgramCache]: Analyzing trace with hash -139109737, now seen corresponding path program 1 times [2020-10-13 05:23:49,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:49,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19042620] [2020-10-13 05:23:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:50,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:50,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:50,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:51,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:52,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:52,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:52,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:52,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:23:54,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:23:54,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:23:54,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:23:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:23:54,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:54,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:54,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:54,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:54,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:54,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:23:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:54,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:54,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:54,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:54,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:23:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:54,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:54,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 05:23:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:54,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:54,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:54,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:54,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 05:23:54,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19042620] [2020-10-13 05:23:54,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:23:54,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:23:54,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975369199] [2020-10-13 05:23:54,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:23:54,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:23:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:23:54,590 INFO L87 Difference]: Start difference. First operand 237 states and 280 transitions. Second operand 4 states. [2020-10-13 05:23:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:54,730 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2020-10-13 05:23:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:23:54,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-13 05:23:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:54,733 INFO L225 Difference]: With dead ends: 333 [2020-10-13 05:23:54,733 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 05:23:54,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:23:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 05:23:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-10-13 05:23:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 05:23:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2020-10-13 05:23:54,758 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 77 [2020-10-13 05:23:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:54,758 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2020-10-13 05:23:54,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:23:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2020-10-13 05:23:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:23:54,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:54,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:54,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:23:54,760 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash -182060962, now seen corresponding path program 4 times [2020-10-13 05:23:54,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:54,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740009448] [2020-10-13 05:23:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:54,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:55,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:55,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:56,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:57,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:57,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:23:59,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:23:59,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:00,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:00,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:00,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:00,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:00,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:00,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:00,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:00,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:00,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:00,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:24:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:00,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:00,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:00,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:00,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:00,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:00,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:00,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:00,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:24:00,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740009448] [2020-10-13 05:24:00,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:00,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:24:00,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716633963] [2020-10-13 05:24:00,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:24:00,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:24:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:24:00,857 INFO L87 Difference]: Start difference. First operand 199 states and 229 transitions. Second operand 18 states. [2020-10-13 05:24:02,039 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-13 05:24:02,660 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-13 05:24:03,169 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 05:24:03,425 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-13 05:24:03,600 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 05:24:05,238 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-13 05:24:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:06,107 INFO L93 Difference]: Finished difference Result 378 states and 447 transitions. [2020-10-13 05:24:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:24:06,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-13 05:24:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:06,111 INFO L225 Difference]: With dead ends: 378 [2020-10-13 05:24:06,111 INFO L226 Difference]: Without dead ends: 362 [2020-10-13 05:24:06,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:24:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-13 05:24:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 237. [2020-10-13 05:24:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 05:24:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2020-10-13 05:24:06,154 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 79 [2020-10-13 05:24:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:06,154 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2020-10-13 05:24:06,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:24:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2020-10-13 05:24:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:24:06,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:06,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:06,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:24:06,157 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1165385650, now seen corresponding path program 5 times [2020-10-13 05:24:06,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:06,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737664284] [2020-10-13 05:24:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:07,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:07,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:09,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 05:24:11,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:24:11,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:24:11,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:24:11,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 05:24:11,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:24:11,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:11,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:11,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:11,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:11,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:11,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:11,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:11,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:11,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:11,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:24:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:11,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:11,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:11,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:11,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:11,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:24:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:11,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:11,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:11,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:11,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:11,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:11,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 05:24:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:11,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:11,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:11,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:11,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:11,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 05:24:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:11,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:11,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:11,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:11,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:11,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:24:11,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:11,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:11,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:11,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:11,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 05:24:11,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737664284] [2020-10-13 05:24:11,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:11,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:24:11,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967957752] [2020-10-13 05:24:11,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:24:11,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:24:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:24:11,434 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand 14 states. [2020-10-13 05:24:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:12,664 INFO L93 Difference]: Finished difference Result 324 states and 384 transitions. [2020-10-13 05:24:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:24:12,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 86 [2020-10-13 05:24:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:12,669 INFO L225 Difference]: With dead ends: 324 [2020-10-13 05:24:12,669 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 05:24:12,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:24:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 05:24:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 280. [2020-10-13 05:24:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 05:24:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 333 transitions. [2020-10-13 05:24:12,723 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 333 transitions. Word has length 86 [2020-10-13 05:24:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:12,723 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 333 transitions. [2020-10-13 05:24:12,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:24:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 333 transitions. [2020-10-13 05:24:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 05:24:12,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:12,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:12,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:24:12,725 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1972195710, now seen corresponding path program 6 times [2020-10-13 05:24:12,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:12,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913159964] [2020-10-13 05:24:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:12,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:12,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:12,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:17,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:17,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 05:24:17,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:24:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:24:17,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:17,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:24:17,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 05:24:17,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:24:17,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:17,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:17,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:17,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:17,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:17,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:17,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:17,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:17,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:17,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:17,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:17,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:17,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:17,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:17,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:24:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:24:17,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:17,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:17,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 05:24:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:17,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:17,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:17,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:24:17,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:24:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 05:24:17,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913159964] [2020-10-13 05:24:17,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:17,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:24:17,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996056151] [2020-10-13 05:24:17,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:24:17,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:24:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:24:17,896 INFO L87 Difference]: Start difference. First operand 280 states and 333 transitions. Second operand 8 states. [2020-10-13 05:24:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:18,663 INFO L93 Difference]: Finished difference Result 344 states and 402 transitions. [2020-10-13 05:24:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:24:18,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-13 05:24:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:18,666 INFO L225 Difference]: With dead ends: 344 [2020-10-13 05:24:18,667 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 05:24:18,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:24:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 05:24:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2020-10-13 05:24:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 05:24:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 306 transitions. [2020-10-13 05:24:18,714 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 306 transitions. Word has length 84 [2020-10-13 05:24:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:18,714 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 306 transitions. [2020-10-13 05:24:18,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:24:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 306 transitions. [2020-10-13 05:24:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 05:24:18,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:18,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:18,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:24:18,717 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash -452594327, now seen corresponding path program 7 times [2020-10-13 05:24:18,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:18,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041456098] [2020-10-13 05:24:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:20,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:20,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:21,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:22,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:22,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:23,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:23,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:23,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:23,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 05:24:23,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:24:23,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 05:24:23,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:23,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:24:23,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 05:24:23,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:24:23,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:24,386 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-13 05:24:25,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:25,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:25,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:25,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:25,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:25,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:25,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:25,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:25,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:25,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:25,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:25,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:25,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:25,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:24:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:25,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:25,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:25,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:25,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:25,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:25,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 05:24:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:25,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:25,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:25,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:25,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:25,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:25,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:25,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:25,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:25,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:25,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:24:25,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041456098] [2020-10-13 05:24:25,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:25,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:24:25,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197767843] [2020-10-13 05:24:25,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:24:25,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:25,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:24:25,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:24:25,242 INFO L87 Difference]: Start difference. First operand 266 states and 306 transitions. Second operand 19 states. [2020-10-13 05:24:26,615 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 05:24:26,949 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-13 05:24:27,183 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-13 05:24:27,462 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-13 05:24:28,017 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-13 05:24:28,716 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 05:24:28,911 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-13 05:24:29,519 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 05:24:29,873 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-13 05:24:30,577 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-13 05:24:30,920 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-13 05:24:31,112 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-13 05:24:31,371 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-13 05:24:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:32,751 INFO L93 Difference]: Finished difference Result 367 states and 428 transitions. [2020-10-13 05:24:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:24:32,752 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-10-13 05:24:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:32,754 INFO L225 Difference]: With dead ends: 367 [2020-10-13 05:24:32,754 INFO L226 Difference]: Without dead ends: 335 [2020-10-13 05:24:32,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:24:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-13 05:24:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 297. [2020-10-13 05:24:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-13 05:24:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 342 transitions. [2020-10-13 05:24:32,813 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 342 transitions. Word has length 88 [2020-10-13 05:24:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:32,813 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 342 transitions. [2020-10-13 05:24:32,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:24:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 342 transitions. [2020-10-13 05:24:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:24:32,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:32,815 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:32,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:24:32,815 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2010325281, now seen corresponding path program 3 times [2020-10-13 05:24:32,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:32,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603180216] [2020-10-13 05:24:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:32,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:32,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:37,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:37,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 05:24:37,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:24:37,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 05:24:37,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:37,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:24:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:24:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:24:37,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:38,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:38,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:38,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:38,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:38,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:38,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:38,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:38,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:38,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:38,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 05:24:38,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603180216] [2020-10-13 05:24:38,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:38,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:24:38,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946296313] [2020-10-13 05:24:38,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:24:38,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:24:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:24:38,095 INFO L87 Difference]: Start difference. First operand 297 states and 342 transitions. Second operand 10 states. [2020-10-13 05:24:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:39,368 INFO L93 Difference]: Finished difference Result 485 states and 563 transitions. [2020-10-13 05:24:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:24:39,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-10-13 05:24:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:39,372 INFO L225 Difference]: With dead ends: 485 [2020-10-13 05:24:39,373 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 05:24:39,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:24:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 05:24:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 280. [2020-10-13 05:24:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 05:24:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 321 transitions. [2020-10-13 05:24:39,421 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 321 transitions. Word has length 86 [2020-10-13 05:24:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:39,422 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 321 transitions. [2020-10-13 05:24:39,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:24:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 321 transitions. [2020-10-13 05:24:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:24:39,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:39,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:39,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:24:39,424 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:39,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1822964601, now seen corresponding path program 8 times [2020-10-13 05:24:39,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:39,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166109470] [2020-10-13 05:24:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:24:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 05:24:44,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:44,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:44,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:44,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:44,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:44,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:44,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:24:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:24:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:44,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:44,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 05:24:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:44,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:44,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 05:24:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:44,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:24:44,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:44,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 05:24:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:44,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:44,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:44,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:44,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:44,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:24:44,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:24:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:44,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 36 proven. 40 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 05:24:44,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166109470] [2020-10-13 05:24:44,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:44,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:24:44,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653080692] [2020-10-13 05:24:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:24:44,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:24:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:24:44,968 INFO L87 Difference]: Start difference. First operand 280 states and 321 transitions. Second operand 17 states. [2020-10-13 05:24:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:46,856 INFO L93 Difference]: Finished difference Result 298 states and 340 transitions. [2020-10-13 05:24:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:24:46,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 95 [2020-10-13 05:24:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:46,860 INFO L225 Difference]: With dead ends: 298 [2020-10-13 05:24:46,860 INFO L226 Difference]: Without dead ends: 282 [2020-10-13 05:24:46,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:24:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-13 05:24:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-10-13 05:24:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 05:24:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 320 transitions. [2020-10-13 05:24:46,905 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 320 transitions. Word has length 95 [2020-10-13 05:24:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:46,905 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 320 transitions. [2020-10-13 05:24:46,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:24:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 320 transitions. [2020-10-13 05:24:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:24:46,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:46,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:46,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:24:46,906 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash 811847351, now seen corresponding path program 9 times [2020-10-13 05:24:46,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:46,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070372820] [2020-10-13 05:24:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:46,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:47,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:47,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:51,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:51,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 05:24:51,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:24:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:24:51,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:24:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:24:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 05:24:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:52,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:52,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:52,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:24:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:52,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:24:52,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:24:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:24:52,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:24:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:52,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:52,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:52,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 05:24:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:52,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 05:24:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:52,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 05:24:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 05:24:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:52,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:52,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:24:52,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:52,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:52,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:52,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:24:52,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:52,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:24:52,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 05:24:52,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070372820] [2020-10-13 05:24:52,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:52,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:24:52,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734734927] [2020-10-13 05:24:52,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:24:52,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:24:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:24:52,223 INFO L87 Difference]: Start difference. First operand 280 states and 320 transitions. Second operand 15 states. [2020-10-13 05:24:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:53,601 INFO L93 Difference]: Finished difference Result 289 states and 327 transitions. [2020-10-13 05:24:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:24:53,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-10-13 05:24:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:53,603 INFO L225 Difference]: With dead ends: 289 [2020-10-13 05:24:53,603 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 05:24:53,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:24:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 05:24:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 05:24:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 05:24:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 247 transitions. [2020-10-13 05:24:53,644 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 247 transitions. Word has length 95 [2020-10-13 05:24:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:53,644 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 247 transitions. [2020-10-13 05:24:53,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:24:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 247 transitions. [2020-10-13 05:24:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:24:53,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:53,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:53,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:24:53,646 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1806154884, now seen corresponding path program 4 times [2020-10-13 05:24:53,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:53,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113854120] [2020-10-13 05:24:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:06,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:06,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12625 [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 05:25:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:06,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:25:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:06,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:06,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:06,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:25:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:06,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:06,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:06,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:06,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 05:25:06,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113854120] [2020-10-13 05:25:06,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:25:06,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:25:06,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359507121] [2020-10-13 05:25:06,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:25:06,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:25:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:25:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:25:06,926 INFO L87 Difference]: Start difference. First operand 214 states and 247 transitions. Second operand 9 states. [2020-10-13 05:25:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:25:07,387 INFO L93 Difference]: Finished difference Result 263 states and 307 transitions. [2020-10-13 05:25:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:25:07,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-10-13 05:25:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:25:07,391 INFO L225 Difference]: With dead ends: 263 [2020-10-13 05:25:07,391 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 05:25:07,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:25:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 05:25:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2020-10-13 05:25:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-13 05:25:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2020-10-13 05:25:07,422 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 90 [2020-10-13 05:25:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:25:07,423 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2020-10-13 05:25:07,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:25:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2020-10-13 05:25:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 05:25:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:25:07,424 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:25:07,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:25:07,424 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:25:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:25:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1945793726, now seen corresponding path program 10 times [2020-10-13 05:25:07,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:25:07,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482696242] [2020-10-13 05:25:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:25:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:07,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:08,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:10,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:12,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:12,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 05:25:12,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:25:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:25:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:25:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 05:25:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:25:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:12,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:25:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:12,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:12,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:12,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:25:12,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:12,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:12,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:12,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:12,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:25:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:12,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:12,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:25:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:12,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:12,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:12,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:12,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:12,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:25:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:25:12,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:12,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 05:25:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:12,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:12,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:25:12,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:12,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 05:25:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:12,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:12,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:12,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:12,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:25:12,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:25:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:25:12,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:25:12,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482696242] [2020-10-13 05:25:12,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:25:12,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:25:12,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541157050] [2020-10-13 05:25:12,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:25:12,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:25:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:25:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:25:12,781 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand 12 states. [2020-10-13 05:25:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:25:14,059 INFO L93 Difference]: Finished difference Result 271 states and 307 transitions. [2020-10-13 05:25:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:25:14,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-10-13 05:25:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:25:14,062 INFO L225 Difference]: With dead ends: 271 [2020-10-13 05:25:14,063 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 05:25:14,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:25:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 05:25:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2020-10-13 05:25:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 05:25:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 238 transitions. [2020-10-13 05:25:14,099 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 238 transitions. Word has length 97 [2020-10-13 05:25:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:25:14,099 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 238 transitions. [2020-10-13 05:25:14,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:25:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 238 transitions. [2020-10-13 05:25:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 05:25:14,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:25:14,100 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:25:14,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:25:14,100 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:25:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:25:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1389921277, now seen corresponding path program 11 times [2020-10-13 05:25:14,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:25:14,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333540992] [2020-10-13 05:25:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:25:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:20,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 05:25:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:25:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5871 [2020-10-13 05:25:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:25:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 05:25:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:25:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:20,616 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2020-10-13 05:25:20,877 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 40 [2020-10-13 05:25:21,126 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2020-10-13 05:25:21,410 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 27 [2020-10-13 05:25:21,668 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 32 [2020-10-13 05:25:22,066 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-10-13 05:25:22,401 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2020-10-13 05:25:22,627 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 21 [2020-10-13 05:25:22,987 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 37 [2020-10-13 05:25:23,720 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 67 [2020-10-13 05:25:24,198 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 72 [2020-10-13 05:25:24,734 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 62 [2020-10-13 05:25:25,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:25:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:25,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:25,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:25,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:25:25,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:25,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:25,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:25,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:25,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:25:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:25,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:25,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:25,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:25,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:25,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:25,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:25,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:25,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:25,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-13 05:25:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:25,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:25,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:25:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 05:25:25,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333540992] [2020-10-13 05:25:25,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:25:25,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:25:25,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220045121] [2020-10-13 05:25:25,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:25:25,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:25:25,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:25:25,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:25:25,374 INFO L87 Difference]: Start difference. First operand 211 states and 238 transitions. Second operand 24 states. [2020-10-13 05:25:26,223 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-13 05:25:26,685 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-13 05:25:27,049 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-13 05:25:27,456 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 86 [2020-10-13 05:25:27,884 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2020-10-13 05:25:28,038 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-13 05:25:28,428 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-10-13 05:25:29,335 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-13 05:25:29,792 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-13 05:25:30,334 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-13 05:25:30,916 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-13 05:25:31,348 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-13 05:25:32,625 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-10-13 05:25:32,965 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-10-13 05:25:33,540 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-13 05:25:34,025 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2020-10-13 05:25:34,492 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2020-10-13 05:25:35,010 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-13 05:25:35,576 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-13 05:25:35,883 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-10-13 05:25:36,020 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-13 05:25:36,473 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 64 [2020-10-13 05:25:36,822 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-13 05:25:37,313 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-13 05:25:37,639 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2020-10-13 05:25:38,205 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 78 [2020-10-13 05:25:38,612 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 65 [2020-10-13 05:25:39,460 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2020-10-13 05:25:39,825 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-13 05:25:40,761 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2020-10-13 05:25:41,334 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-13 05:25:41,778 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-13 05:25:42,842 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2020-10-13 05:25:43,280 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-10-13 05:25:43,677 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-13 05:25:43,895 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-13 05:25:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:25:44,683 INFO L93 Difference]: Finished difference Result 476 states and 563 transitions. [2020-10-13 05:25:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-13 05:25:44,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-10-13 05:25:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:25:44,688 INFO L225 Difference]: With dead ends: 476 [2020-10-13 05:25:44,688 INFO L226 Difference]: Without dead ends: 439 [2020-10-13 05:25:44,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 11 SyntacticMatches, 18 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=1565, Invalid=9777, Unknown=0, NotChecked=0, Total=11342 [2020-10-13 05:25:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-13 05:25:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 255. [2020-10-13 05:25:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-13 05:25:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 289 transitions. [2020-10-13 05:25:44,749 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 289 transitions. Word has length 99 [2020-10-13 05:25:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:25:44,749 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 289 transitions. [2020-10-13 05:25:44,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:25:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 289 transitions. [2020-10-13 05:25:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 05:25:44,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:25:44,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:25:44,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:25:44,751 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:25:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:25:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1503806620, now seen corresponding path program 12 times [2020-10-13 05:25:44,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:25:44,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210708305] [2020-10-13 05:25:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:25:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:44,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:46,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:47,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:48,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:49,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:49,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:49,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 05:25:49,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:50,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:25:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:50,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:50,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:50,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:25:50,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:50,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:50,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:50,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:50,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:25:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:50,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:50,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:50,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:50,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:50,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-13 05:25:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:50,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:50,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:50,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:50,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:50,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:25:50,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:25:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:25:50,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 05:25:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:50,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:50,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:50,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:50,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:25:50,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:50,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:25:50,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:50,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:25:50,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 05:25:50,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210708305] [2020-10-13 05:25:50,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:25:50,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:25:50,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666081814] [2020-10-13 05:25:50,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:25:50,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:25:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:25:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:25:50,568 INFO L87 Difference]: Start difference. First operand 255 states and 289 transitions. Second operand 12 states. [2020-10-13 05:25:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:25:51,720 INFO L93 Difference]: Finished difference Result 288 states and 325 transitions. [2020-10-13 05:25:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:25:51,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 108 [2020-10-13 05:25:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:25:51,723 INFO L225 Difference]: With dead ends: 288 [2020-10-13 05:25:51,723 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 05:25:51,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:25:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 05:25:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2020-10-13 05:25:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-13 05:25:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 286 transitions. [2020-10-13 05:25:51,779 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 286 transitions. Word has length 108 [2020-10-13 05:25:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:25:51,779 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 286 transitions. [2020-10-13 05:25:51,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:25:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 286 transitions. [2020-10-13 05:25:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 05:25:51,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:25:51,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:25:51,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:25:51,781 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:25:51,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:25:51,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1260112775, now seen corresponding path program 13 times [2020-10-13 05:25:51,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:25:51,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195237476] [2020-10-13 05:25:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:25:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:56,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:56,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 05:25:56,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:25:56,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:25:56,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:56,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:25:56,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 05:25:56,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:25:56,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:25:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:57,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:57,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:57,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:25:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:57,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:57,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:57,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:57,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:57,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:57,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:57,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:57,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:25:57,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:57,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:57,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-13 05:25:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:57,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:25:57,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:25:57,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:25:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:25:57,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:25:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:25:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:25:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:25:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:25:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-13 05:25:57,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195237476] [2020-10-13 05:25:57,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:25:57,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:25:57,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418009073] [2020-10-13 05:25:57,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:25:57,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:25:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:25:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:25:57,237 INFO L87 Difference]: Start difference. First operand 254 states and 286 transitions. Second operand 12 states. [2020-10-13 05:25:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:25:59,401 INFO L93 Difference]: Finished difference Result 551 states and 627 transitions. [2020-10-13 05:25:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:25:59,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 107 [2020-10-13 05:25:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:25:59,406 INFO L225 Difference]: With dead ends: 551 [2020-10-13 05:25:59,406 INFO L226 Difference]: Without dead ends: 354 [2020-10-13 05:25:59,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:25:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-13 05:25:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 337. [2020-10-13 05:25:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-13 05:25:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 381 transitions. [2020-10-13 05:25:59,473 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 381 transitions. Word has length 107 [2020-10-13 05:25:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:25:59,473 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 381 transitions. [2020-10-13 05:25:59,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:25:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 381 transitions. [2020-10-13 05:25:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 05:25:59,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:25:59,475 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:25:59,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:25:59,476 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:25:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:25:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash 218929438, now seen corresponding path program 14 times [2020-10-13 05:25:59,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:25:59,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520919463] [2020-10-13 05:25:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:25:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:25:59,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:25:59,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:00,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:00,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:04,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 05:26:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:05,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:26:05,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:26:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:05,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:05,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:26:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:05,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:05,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 05:26:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:05,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:05,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:05,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:05,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 05:26:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:05,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:05,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:05,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:05,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:05,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-13 05:26:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:05,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:05,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:05,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:05,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:05,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-13 05:26:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:05,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:05,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:05,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:05,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:05,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:26:05,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:05,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:26:05,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:05,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 50 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-10-13 05:26:05,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520919463] [2020-10-13 05:26:05,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:05,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:26:05,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603212686] [2020-10-13 05:26:05,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:26:05,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:26:05,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:26:05,790 INFO L87 Difference]: Start difference. First operand 337 states and 381 transitions. Second operand 20 states.