/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-fpi/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:07:03,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:07:03,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:07:03,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:07:03,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:07:03,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:07:03,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:07:03,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:07:03,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:07:03,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:07:03,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:07:03,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:07:03,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:07:03,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:07:03,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:07:03,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:07:03,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:07:03,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:07:03,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:07:03,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:07:03,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:07:03,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:07:03,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:07:03,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:07:03,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:07:03,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:07:03,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:07:03,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:07:03,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:07:03,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:07:03,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:07:03,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:07:03,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:07:03,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:07:03,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:07:03,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:07:03,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:07:03,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:07:03,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:07:03,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:07:03,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:07:03,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:07:03,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:07:03,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:07:03,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:07:03,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:07:03,869 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:07:03,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:07:03,870 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:07:03,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:07:03,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:07:03,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:07:03,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:07:03,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:07:03,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:07:03,872 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:07:03,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:07:03,872 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:07:03,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:07:03,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:07:03,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:07:03,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:07:03,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:07:03,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:03,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:07:03,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:07:03,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:07:03,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:07:03,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:07:03,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:07:03,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:07:03,875 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 05:07:04,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:07:04,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:07:04,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:07:04,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:07:04,203 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:07:04,204 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2020-10-13 05:07:04,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68c03ce0f/33de984359f74f3ab9fc65f807eddb6c/FLAG37845a3eb [2020-10-13 05:07:04,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:07:04,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms1.c [2020-10-13 05:07:04,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68c03ce0f/33de984359f74f3ab9fc65f807eddb6c/FLAG37845a3eb [2020-10-13 05:07:05,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68c03ce0f/33de984359f74f3ab9fc65f807eddb6c [2020-10-13 05:07:05,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:07:05,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:07:05,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:05,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:07:05,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:07:05,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2018f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05, skipping insertion in model container [2020-10-13 05:07:05,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:07:05,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:07:05,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:05,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:07:05,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:05,420 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:07:05,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05 WrapperNode [2020-10-13 05:07:05,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:05,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:07:05,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:07:05,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:07:05,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (1/1) ... [2020-10-13 05:07:05,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:07:05,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:07:05,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:07:05,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:07:05,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (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 05:07:05,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:07:05,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:07:05,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:07:05,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:07:05,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:07:05,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:07:05,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:07:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:07:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:07:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:07:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:07:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:07:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:07:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:07:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:07:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:07:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:07:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:07:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:07:05,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:07:05,888 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:07:05,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:05 BoogieIcfgContainer [2020-10-13 05:07:05,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:07:05,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:07:05,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:07:05,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:07:05,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:07:05" (1/3) ... [2020-10-13 05:07:05,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e23f76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:05, skipping insertion in model container [2020-10-13 05:07:05,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:05" (2/3) ... [2020-10-13 05:07:05,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e23f76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:05, skipping insertion in model container [2020-10-13 05:07:05,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:05" (3/3) ... [2020-10-13 05:07:05,902 INFO L109 eAbstractionObserver]: Analyzing ICFG ms1.c [2020-10-13 05:07:05,914 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:07:05,921 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:07:05,936 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:07:05,963 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:07:05,963 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:07:05,963 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:07:05,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:07:05,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:07:05,964 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:07:05,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:07:05,964 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:07:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 05:07:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:07:05,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:05,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:05,995 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-13 05:07:06,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:06,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912713454] [2020-10-13 05:07:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:06,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:06,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:07:06,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-13 05:07:06,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:06,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:07:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:06,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:07:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:06,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:06,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:06,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:06,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:06,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:06,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:06,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:06,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:06,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:07:06,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:06,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:06,766 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 05:07:06,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912713454] [2020-10-13 05:07:06,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:06,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:07:06,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759029977] [2020-10-13 05:07:06,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:07:06,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:07:06,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:06,806 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 05:07:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:06,951 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-13 05:07:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:07:06,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-13 05:07:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:06,974 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:07:06,974 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 05:07:06,980 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 05:07:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 05:07:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 05:07:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:07:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 05:07:07,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-13 05:07:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:07,051 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 05:07:07,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:07:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 05:07:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:07:07,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:07,054 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] [2020-10-13 05:07:07,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:07:07,055 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-10-13 05:07:07,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:07,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512209038] [2020-10-13 05:07:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:07:07,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:07,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-13 05:07:07,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:07:07,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:07:07,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:07,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:07,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:07,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:07,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:07:07,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:07,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:07:07,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:07,382 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 05:07:07,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512209038] [2020-10-13 05:07:07,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:07,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:07:07,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484802819] [2020-10-13 05:07:07,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:07:07,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:07,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:07:07,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:07:07,386 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-13 05:07:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:07,528 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-13 05:07:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:07,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 05:07:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:07,531 INFO L225 Difference]: With dead ends: 37 [2020-10-13 05:07:07,531 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 05:07:07,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:07:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 05:07:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 05:07:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:07:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 05:07:07,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-13 05:07:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:07,541 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 05:07:07,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:07:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 05:07:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:07:07,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:07,543 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] [2020-10-13 05:07:07,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:07:07,544 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-13 05:07:07,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:07,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108785591] [2020-10-13 05:07:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:07:07,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-13 05:07:07,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:07:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:07:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:07:07,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:07,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:07,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:07:07,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:07,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:07,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:07,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:07,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108785591] [2020-10-13 05:07:07,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:07,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 05:07:07,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238455591] [2020-10-13 05:07:07,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:07:07,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:07,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:07:07,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:07:07,804 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-13 05:07:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:08,010 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-13 05:07:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:07:08,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 05:07:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:08,012 INFO L225 Difference]: With dead ends: 36 [2020-10-13 05:07:08,012 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 05:07:08,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:07:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 05:07:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 05:07:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:07:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 05:07:08,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2020-10-13 05:07:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:08,021 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 05:07:08,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:07:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 05:07:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:07:08,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:08,024 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] [2020-10-13 05:07:08,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:07:08,024 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1255066423, now seen corresponding path program 1 times [2020-10-13 05:07:08,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:08,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360811808] [2020-10-13 05:07:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:08,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:08,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:07:08,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:08,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-13 05:07:08,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:07:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:07:08,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:08,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:08,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:08,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:08,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:08,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:08,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:08,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:08,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:08,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:08,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:08,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:08,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:08,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:08,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360811808] [2020-10-13 05:07:08,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:08,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:07:08,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046035227] [2020-10-13 05:07:08,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:07:08,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:08,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:07:08,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:07:08,668 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2020-10-13 05:07:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:08,738 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-13 05:07:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:07:08,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-13 05:07:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:08,739 INFO L225 Difference]: With dead ends: 42 [2020-10-13 05:07:08,739 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:07:08,740 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 05:07:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:07:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 05:07:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:07:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 05:07:08,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-13 05:07:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:08,748 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 05:07:08,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:07:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 05:07:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:07:08,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:08,749 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:07:08,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:07:08,750 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1827351009, now seen corresponding path program 1 times [2020-10-13 05:07:08,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:08,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538781739] [2020-10-13 05:07:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:08,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:09,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:10,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:07:10,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:07:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-13 05:07:10,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:07:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:10,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:10,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:10,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:10,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:10,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:10,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:10,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:10,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:10,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:10,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:10,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:10,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:10,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:10,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:10,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:10,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:10,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538781739] [2020-10-13 05:07:10,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:10,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:07:10,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687083540] [2020-10-13 05:07:10,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:10,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:10,696 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-13 05:07:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:10,858 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 05:07:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:07:10,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 05:07:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:10,859 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:07:10,859 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:07:10,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:07:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:07:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 05:07:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:07:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 05:07:10,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-13 05:07:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:10,868 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 05:07:10,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 05:07:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:07:10,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:10,869 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:07:10,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:07:10,870 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1246872481, now seen corresponding path program 2 times [2020-10-13 05:07:10,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:10,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392461574] [2020-10-13 05:07:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:11,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:11,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:11,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:07:11,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:11,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-13 05:07:11,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:07:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:12,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:12,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:12,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:12,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:12,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:12,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:12,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:12,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:12,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:12,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:12,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:12,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:12,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392461574] [2020-10-13 05:07:12,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:12,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:12,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180084962] [2020-10-13 05:07:12,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:12,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:12,021 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2020-10-13 05:07:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:12,557 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-13 05:07:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:07:12,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-13 05:07:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:12,559 INFO L225 Difference]: With dead ends: 45 [2020-10-13 05:07:12,559 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 05:07:12,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:07:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 05:07:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-13 05:07:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:07:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 05:07:12,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-10-13 05:07:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:12,567 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 05:07:12,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 05:07:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 05:07:12,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:12,568 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:07:12,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:07:12,569 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 3 times [2020-10-13 05:07:12,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:12,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013042434] [2020-10-13 05:07:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:12,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:15,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:07:15,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:07:15,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2542 [2020-10-13 05:07:15,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:07:15,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:15,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:07:15,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:07:15,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:15,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:15,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:15,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:15,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:15,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:15,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:15,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:15,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:07:15,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:15,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:15,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:15,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:15,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:15,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:15,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:15,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:15,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:15,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013042434] [2020-10-13 05:07:15,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:15,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:07:15,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639733081] [2020-10-13 05:07:15,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:07:15,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:07:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:07:15,244 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-10-13 05:07:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:15,537 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-13 05:07:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:15,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-13 05:07:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:15,539 INFO L225 Difference]: With dead ends: 75 [2020-10-13 05:07:15,539 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 05:07:15,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:07:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 05:07:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-10-13 05:07:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:07:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 05:07:15,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 34 [2020-10-13 05:07:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:15,548 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 05:07:15,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:07:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 05:07:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:07:15,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:15,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 05:07:15,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:07:15,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1923985017, now seen corresponding path program 4 times [2020-10-13 05:07:15,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:15,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570020969] [2020-10-13 05:07:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:15,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:17,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:17,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:07:17,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:17,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1811 [2020-10-13 05:07:17,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:17,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:07:17,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:17,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:07:17,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:18,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:18,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:18,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:18,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:18,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:18,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:18,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:18,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:18,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:18,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:18,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:18,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:18,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:18,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:18,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:18,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:18,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:18,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570020969] [2020-10-13 05:07:18,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:18,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:07:18,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385976609] [2020-10-13 05:07:18,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:07:18,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:07:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:07:18,039 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 18 states. [2020-10-13 05:07:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:19,304 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-13 05:07:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:07:19,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-13 05:07:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:19,306 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:07:19,306 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 05:07:19,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:07:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 05:07:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-13 05:07:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:07:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 05:07:19,313 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-10-13 05:07:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:19,313 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 05:07:19,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:07:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 05:07:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:07:19,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:19,315 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:19,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:07:19,315 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash -932931423, now seen corresponding path program 5 times [2020-10-13 05:07:19,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:19,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915100966] [2020-10-13 05:07:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:19,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:07:23,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:07:23,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4227 [2020-10-13 05:07:23,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:07:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:07:23,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:07:23,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:23,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:23,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:23,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:23,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:23,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:23,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:23,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:23,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:23,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:23,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:23,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:23,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 05:07:23,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915100966] [2020-10-13 05:07:23,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:23,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:07:23,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225842202] [2020-10-13 05:07:23,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:07:23,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:07:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:23,630 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-13 05:07:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:23,729 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-13 05:07:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:23,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-13 05:07:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:23,731 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:07:23,731 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:07:23,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:07:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 05:07:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:07:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 05:07:23,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 39 [2020-10-13 05:07:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:23,741 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 05:07:23,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:07:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 05:07:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:07:23,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:23,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 05:07:23,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:07:23,745 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 6 times [2020-10-13 05:07:23,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:23,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520789704] [2020-10-13 05:07:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:23,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:28,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:07:28,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:07:28,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4787 [2020-10-13 05:07:28,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:07:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:07:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:28,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:28,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:28,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:28,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:28,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:28,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:28,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:28,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:28,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:28,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:28,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:28,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:28,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:28,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:28,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:28,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:28,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:28,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:28,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:28,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:28,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520789704] [2020-10-13 05:07:28,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:28,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:07:28,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116629960] [2020-10-13 05:07:28,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:07:28,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:07:28,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:07:28,660 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 12 states. [2020-10-13 05:07:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:28,899 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-13 05:07:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:28,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-13 05:07:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:28,901 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:07:28,901 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:07:28,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:07:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:07:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-13 05:07:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:07:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 05:07:28,911 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-13 05:07:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:28,911 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 05:07:28,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:07:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 05:07:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:07:28,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:28,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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 05:07:28,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:07:28,914 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash 604598565, now seen corresponding path program 7 times [2020-10-13 05:07:28,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:28,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160352627] [2020-10-13 05:07:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:28,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:30,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:07:30,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:07:30,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1805 [2020-10-13 05:07:30,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:07:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:07:30,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:31,350 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2020-10-13 05:07:31,633 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-13 05:07:31,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:31,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:31,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:31,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:31,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:31,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:31,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:31,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:31,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:31,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:31,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:31,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160352627] [2020-10-13 05:07:31,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:31,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:07:31,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853857097] [2020-10-13 05:07:31,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:07:31,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:31,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:07:31,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:07:31,988 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 22 states. [2020-10-13 05:07:32,739 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-13 05:07:33,157 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-10-13 05:07:33,392 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-13 05:07:33,611 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-13 05:07:33,991 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 05:07:34,271 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 05:07:34,660 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 05:07:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:34,698 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-13 05:07:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:07:34,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-13 05:07:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:34,699 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:07:34,699 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:07:34,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:07:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:07:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 05:07:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:07:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 05:07:34,715 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2020-10-13 05:07:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:34,715 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 05:07:34,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:07:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 05:07:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:07:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:34,717 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:07:34,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:07:34,717 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:34,718 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 8 times [2020-10-13 05:07:34,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:34,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498758914] [2020-10-13 05:07:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:34,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:07:39,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:07:39,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4484 [2020-10-13 05:07:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:07:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:39,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:39,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:39,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:39,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:39,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:39,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498758914] [2020-10-13 05:07:39,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:39,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:39,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657880417] [2020-10-13 05:07:39,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:39,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:39,353 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2020-10-13 05:07:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:39,625 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-13 05:07:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:07:39,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 05:07:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:39,626 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:07:39,626 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:07:39,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:07:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:07:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-13 05:07:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 05:07:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 05:07:39,643 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-13 05:07:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:39,648 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 05:07:39,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 05:07:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:07:39,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:39,649 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 05:07:39,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:07:39,650 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -634097661, now seen corresponding path program 9 times [2020-10-13 05:07:39,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:39,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328866745] [2020-10-13 05:07:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:42,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:07:42,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:07:42,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3194 [2020-10-13 05:07:42,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:42,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:07:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:07:42,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:43,389 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-10-13 05:07:43,546 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 05:07:43,748 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-13 05:07:43,895 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-13 05:07:44,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:44,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:44,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:44,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:44,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:44,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:44,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:44,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:44,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:44,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:44,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:44,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:44,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:44,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:44,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:44,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:44,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:44,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:44,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328866745] [2020-10-13 05:07:44,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:44,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:07:44,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451263185] [2020-10-13 05:07:44,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:07:44,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:44,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:07:44,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:07:44,498 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 26 states. [2020-10-13 05:07:45,512 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 71 [2020-10-13 05:07:46,201 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2020-10-13 05:07:46,497 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-13 05:07:46,855 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-13 05:07:47,053 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-13 05:07:47,379 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-13 05:07:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:48,049 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-13 05:07:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:07:48,051 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-10-13 05:07:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:48,052 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:07:48,052 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:07:48,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:07:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:07:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 05:07:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:07:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 05:07:48,060 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-10-13 05:07:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:48,061 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 05:07:48,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:07:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 05:07:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:07:48,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:48,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 05:07:48,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:07:48,062 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:48,063 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 10 times [2020-10-13 05:07:48,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:48,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248289309] [2020-10-13 05:07:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:07:53,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:07:53,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:07:53,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:07:53,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:53,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:07:53,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:53,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:53,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:53,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:53,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248289309] [2020-10-13 05:07:53,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:53,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:07:53,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105005925] [2020-10-13 05:07:53,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:07:53,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:53,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:07:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:07:53,247 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 16 states. [2020-10-13 05:07:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:53,607 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-13 05:07:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:07:53,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-13 05:07:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:53,609 INFO L225 Difference]: With dead ends: 81 [2020-10-13 05:07:53,609 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:07:53,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:07:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:07:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 05:07:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:07:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 05:07:53,618 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-13 05:07:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:53,618 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 05:07:53,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:07:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 05:07:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:07:53,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:53,619 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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 05:07:53,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:07:53,620 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1307011415, now seen corresponding path program 11 times [2020-10-13 05:07:53,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:53,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902818093] [2020-10-13 05:07:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:56,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:07:56,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:07:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3046 [2020-10-13 05:07:56,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:07:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:07:56,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:57,340 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-13 05:07:57,527 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 37 [2020-10-13 05:07:58,097 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-13 05:07:58,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:58,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:58,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:58,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:58,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:58,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:58,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:58,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:58,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902818093] [2020-10-13 05:07:58,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:58,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:07:58,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19423191] [2020-10-13 05:07:58,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:07:58,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:07:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:07:58,601 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-10-13 05:07:59,838 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2020-10-13 05:08:00,403 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-10-13 05:08:00,693 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-13 05:08:01,025 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-13 05:08:01,208 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-13 05:08:01,451 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 05:08:01,769 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 05:08:02,255 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 05:08:02,622 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-13 05:08:02,906 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-13 05:08:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:02,960 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-13 05:08:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:08:02,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-10-13 05:08:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:02,962 INFO L225 Difference]: With dead ends: 61 [2020-10-13 05:08:02,962 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:08:02,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=438, Invalid=2532, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:08:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:08:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 05:08:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:08:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 05:08:02,971 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-10-13 05:08:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:02,971 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 05:08:02,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:08:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 05:08:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:08:02,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:02,972 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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 05:08:02,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:08:02,973 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1863650753, now seen corresponding path program 12 times [2020-10-13 05:08:02,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:02,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591891137] [2020-10-13 05:08:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:07,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:08:07,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:08:07,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:08:07,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:07,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:08:07,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:07,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:08:07,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:08,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:08,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:08,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:08,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:08,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:08,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:08,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:08,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:08,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:08,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:08,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:08,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591891137] [2020-10-13 05:08:08,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:08,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:08:08,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259484906] [2020-10-13 05:08:08,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:08:08,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:08:08,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:08:08,181 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 18 states. [2020-10-13 05:08:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:08,540 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-13 05:08:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:08:08,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-13 05:08:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:08,541 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:08:08,541 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:08:08,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:08:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:08:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-13 05:08:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:08:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 05:08:08,549 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-13 05:08:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:08,549 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 05:08:08,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:08:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 05:08:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:08:08,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:08,550 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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 05:08:08,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:08:08,551 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash 900265599, now seen corresponding path program 13 times [2020-10-13 05:08:08,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:08,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202074147] [2020-10-13 05:08:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:09,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4048 [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:08:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:08:12,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:08:12,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:13,345 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-13 05:08:13,579 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-10-13 05:08:13,856 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-10-13 05:08:14,283 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 47 [2020-10-13 05:08:14,530 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2020-10-13 05:08:14,834 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2020-10-13 05:08:15,010 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2020-10-13 05:08:15,274 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2020-10-13 05:08:15,616 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2020-10-13 05:08:16,003 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-13 05:08:16,236 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-10-13 05:08:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:16,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:16,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:16,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:16,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:16,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:16,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:16,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:08:16,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202074147] [2020-10-13 05:08:16,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:16,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:08:16,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270767736] [2020-10-13 05:08:16,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:08:16,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:08:16,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:08:16,621 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-10-13 05:08:18,392 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 96 [2020-10-13 05:08:19,342 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2020-10-13 05:08:19,793 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-13 05:08:20,187 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-13 05:08:20,494 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 05:08:20,777 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-13 05:08:20,987 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-13 05:08:21,198 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-13 05:08:21,516 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 05:08:21,796 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-13 05:08:22,184 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-13 05:08:22,640 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-13 05:08:23,035 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 05:08:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:23,090 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-10-13 05:08:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:08:23,091 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-10-13 05:08:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:23,092 INFO L225 Difference]: With dead ends: 66 [2020-10-13 05:08:23,092 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:08:23,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=545, Invalid=3237, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:08:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:08:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 05:08:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:08:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 05:08:23,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-10-13 05:08:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:23,101 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 05:08:23,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:08:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 05:08:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:08:23,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:23,102 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 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 05:08:23,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:08:23,103 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1391094229, now seen corresponding path program 14 times [2020-10-13 05:08:23,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:23,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648997866] [2020-10-13 05:08:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:23,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:28,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:08:28,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:08:28,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:08:28,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:28,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:08:28,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:28,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 05:08:28,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:28,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:28,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:28,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:28,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:28,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:28,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:28,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:28,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 79 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:28,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648997866] [2020-10-13 05:08:28,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:28,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:08:28,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443338963] [2020-10-13 05:08:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:08:28,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:08:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:08:28,472 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-10-13 05:08:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:29,012 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-13 05:08:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:08:29,013 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-13 05:08:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:29,014 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:08:29,014 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 05:08:29,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:08:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 05:08:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-13 05:08:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:08:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 05:08:29,021 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-13 05:08:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:29,022 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 05:08:29,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:08:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 05:08:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:08:29,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:29,023 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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 05:08:29,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:08:29,023 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash 854291501, now seen corresponding path program 15 times [2020-10-13 05:08:29,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:29,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269720852] [2020-10-13 05:08:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:29,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:31,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:32,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:08:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:08:34,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:08:34,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:34,728 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-13 05:08:34,869 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-13 05:08:35,179 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2020-10-13 05:08:35,335 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2020-10-13 05:08:35,668 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 52 [2020-10-13 05:08:35,945 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 43 [2020-10-13 05:08:36,309 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 47 [2020-10-13 05:08:36,496 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 37 [2020-10-13 05:08:36,733 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 43 [2020-10-13 05:08:36,950 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-13 05:08:37,213 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2020-10-13 05:08:37,396 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2020-10-13 05:08:38,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:38,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:38,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:38,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:38,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:38,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:38,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:38,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 53 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:08:38,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269720852] [2020-10-13 05:08:38,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:38,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:08:38,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846433520] [2020-10-13 05:08:38,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:08:38,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:08:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:08:38,386 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 38 states. [2020-10-13 05:08:40,727 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 111 [2020-10-13 05:08:41,981 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 110 [2020-10-13 05:08:42,548 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 115 [2020-10-13 05:08:43,330 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2020-10-13 05:08:43,764 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-13 05:08:44,396 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2020-10-13 05:08:44,734 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-13 05:08:45,222 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-13 05:08:45,486 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-13 05:08:45,864 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-13 05:08:46,266 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-13 05:08:47,141 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2020-10-13 05:08:47,825 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2020-10-13 05:08:48,548 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2020-10-13 05:08:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:48,616 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-10-13 05:08:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:08:48,617 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 61 [2020-10-13 05:08:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:48,618 INFO L225 Difference]: With dead ends: 71 [2020-10-13 05:08:48,618 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 05:08:48,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=667, Invalid=4025, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 05:08:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 05:08:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 05:08:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 05:08:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-13 05:08:48,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2020-10-13 05:08:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:48,628 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-13 05:08:48,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:08:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-13 05:08:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:08:48,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:48,629 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 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 05:08:48,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:08:48,629 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash -910880323, now seen corresponding path program 16 times [2020-10-13 05:08:48,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:48,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496540513] [2020-10-13 05:08:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:50,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:51,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:51,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:53,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:08:53,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:08:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:08:53,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:08:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:08:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:53,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:53,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:53,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:53,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:53,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:53,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:53,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:53,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:53,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:53,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:53,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:53,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:53,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:53,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:53,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:53,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:53,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:53,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496540513] [2020-10-13 05:08:53,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:53,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:08:53,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182417875] [2020-10-13 05:08:53,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:08:53,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:08:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:08:53,929 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 22 states. [2020-10-13 05:08:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:54,464 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-13 05:08:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:08:54,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-13 05:08:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:54,466 INFO L225 Difference]: With dead ends: 105 [2020-10-13 05:08:54,466 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:08:54,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:08:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:08:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-13 05:08:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:08:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 05:08:54,473 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-13 05:08:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:54,473 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 05:08:54,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:08:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 05:08:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:08:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:54,474 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 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 05:08:54,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:08:54,474 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2017699067, now seen corresponding path program 17 times [2020-10-13 05:08:54,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:54,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576554833] [2020-10-13 05:08:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:54,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:55,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:56,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:08:59,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:08:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:08:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:00,157 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 05:09:00,356 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-13 05:09:00,683 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-13 05:09:00,870 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-13 05:09:01,066 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-13 05:09:01,291 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2020-10-13 05:09:01,507 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-13 05:09:01,814 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-13 05:09:02,029 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-13 05:09:02,223 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-13 05:09:02,420 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-13 05:09:02,614 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-13 05:09:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:04,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:04,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:04,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:04,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:04,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:04,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:04,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:04,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:04,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:04,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:04,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 1 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:04,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576554833] [2020-10-13 05:09:04,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:04,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:09:04,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116771337] [2020-10-13 05:09:04,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:09:04,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:09:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:09:04,841 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 43 states. [2020-10-13 05:09:05,575 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-13 05:09:06,567 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-13 05:09:06,841 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-13 05:09:07,386 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 86 [2020-10-13 05:09:07,620 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-13 05:09:07,821 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-13 05:09:08,046 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-13 05:09:08,331 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 05:09:08,668 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 57 [2020-10-13 05:09:09,095 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-13 05:09:09,512 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2020-10-13 05:09:09,830 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-10-13 05:09:10,376 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2020-10-13 05:09:10,743 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2020-10-13 05:09:11,060 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-13 05:09:11,388 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-13 05:09:11,649 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-13 05:09:11,890 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-13 05:09:12,108 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-13 05:09:12,335 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-13 05:09:12,884 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2020-10-13 05:09:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:13,387 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-13 05:09:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:09:13,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 66 [2020-10-13 05:09:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:13,389 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:09:13,390 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:09:13,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=736, Invalid=4376, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 05:09:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:09:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 05:09:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:09:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 05:09:13,403 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-10-13 05:09:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:13,404 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 05:09:13,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:09:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 05:09:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:09:13,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:13,404 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 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 05:09:13,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:09:13,405 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:13,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2072806959, now seen corresponding path program 18 times [2020-10-13 05:09:13,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:13,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146375182] [2020-10-13 05:09:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:16,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:18,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:09:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:18,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:18,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:18,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:18,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:18,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:18,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:18,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:18,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:18,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:18,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:18,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:18,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:18,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:18,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:18,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:18,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:18,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:18,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146375182] [2020-10-13 05:09:18,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:18,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:09:18,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334783338] [2020-10-13 05:09:18,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:09:18,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:18,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:09:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:09:18,907 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 24 states. [2020-10-13 05:09:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:19,635 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-13 05:09:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:09:19,639 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-13 05:09:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:19,640 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:09:19,640 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:09:19,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:09:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:09:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-13 05:09:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:09:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 05:09:19,650 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-13 05:09:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:19,651 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 05:09:19,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:09:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 05:09:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:09:19,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:19,651 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 05:09:19,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:09:19,652 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -135378511, now seen corresponding path program 19 times [2020-10-13 05:09:19,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:19,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722571742] [2020-10-13 05:09:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:23,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:24,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:24,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:24,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:09:24,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:09:24,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-13 05:09:24,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:09:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:09:24,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:26,122 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-13 05:09:27,248 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-13 05:09:29,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:29,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:29,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:29,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:29,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:29,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:29,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:29,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:29,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:29,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:29,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722571742] [2020-10-13 05:09:29,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:29,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:09:29,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192031456] [2020-10-13 05:09:29,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:09:29,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:29,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:09:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:09:29,501 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 47 states. [2020-10-13 05:09:31,531 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 48 [2020-10-13 05:09:31,777 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-13 05:09:32,072 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-13 05:09:32,303 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-13 05:09:32,541 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2020-10-13 05:09:32,847 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2020-10-13 05:09:33,128 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 61 [2020-10-13 05:09:33,476 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 62 [2020-10-13 05:09:33,839 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 59 [2020-10-13 05:09:34,251 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 61 [2020-10-13 05:09:34,647 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-13 05:09:35,033 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 60 [2020-10-13 05:09:35,391 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2020-10-13 05:09:35,788 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 62 [2020-10-13 05:09:36,161 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-13 05:09:36,489 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2020-10-13 05:09:36,816 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-10-13 05:09:37,472 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-13 05:09:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:38,123 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-10-13 05:09:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:09:38,125 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 71 [2020-10-13 05:09:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:38,126 INFO L225 Difference]: With dead ends: 81 [2020-10-13 05:09:38,126 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:09:38,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=675, Invalid=5487, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 05:09:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:09:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 05:09:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:09:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-13 05:09:38,138 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2020-10-13 05:09:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:38,139 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-13 05:09:38,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:09:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-13 05:09:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:09:38,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:38,140 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 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 05:09:38,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:09:38,140 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 780279225, now seen corresponding path program 20 times [2020-10-13 05:09:38,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:38,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739237833] [2020-10-13 05:09:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:43,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:43,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:09:43,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:09:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:09:43,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:09:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:09:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:43,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:43,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:43,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:43,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 176 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:43,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739237833] [2020-10-13 05:09:43,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:43,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:09:43,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110436676] [2020-10-13 05:09:43,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:09:43,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:09:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:09:43,607 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-10-13 05:09:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:44,384 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-10-13 05:09:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:09:44,385 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-10-13 05:09:44,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:44,386 INFO L225 Difference]: With dead ends: 121 [2020-10-13 05:09:44,386 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:09:44,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:09:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:09:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-13 05:09:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 05:09:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-13 05:09:44,414 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-13 05:09:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:44,415 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-13 05:09:44,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:09:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-13 05:09:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:09:44,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:44,416 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 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 05:09:44,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:09:44,417 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash -443008137, now seen corresponding path program 21 times [2020-10-13 05:09:44,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:44,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670303442] [2020-10-13 05:09:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:44,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:49,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:49,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:09:49,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:50,823 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-13 05:09:51,749 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-13 05:09:52,019 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-13 05:09:52,715 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 55 [2020-10-13 05:09:53,307 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 58 [2020-10-13 05:09:54,135 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 63 [2020-10-13 05:09:54,511 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 55 [2020-10-13 05:09:55,410 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 61 [2020-10-13 05:09:55,916 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 51 [2020-10-13 05:09:56,404 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 56 [2020-10-13 05:09:56,729 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 47 [2020-10-13 05:09:57,213 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 53 [2020-10-13 05:09:57,667 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 43 [2020-10-13 05:09:58,202 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-10-13 05:09:58,472 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2020-10-13 05:09:58,898 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 39 [2020-10-13 05:09:59,257 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-13 05:09:59,597 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2020-10-13 05:10:00,151 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-13 05:10:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:01,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:01,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:01,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:01,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:01,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:01,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:01,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:01,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:01,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:01,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:01,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:01,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:01,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:01,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 104 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:10:01,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670303442] [2020-10-13 05:10:01,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:01,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 05:10:01,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989973527] [2020-10-13 05:10:01,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 05:10:01,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 05:10:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:10:01,658 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 50 states. [2020-10-13 05:10:02,405 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-13 05:10:02,680 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 05:10:02,970 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 05:10:03,281 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-13 05:10:03,599 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-13 05:10:03,932 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 05:10:04,304 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-13 05:10:04,663 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-13 05:10:04,987 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-13 05:10:05,274 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-13 05:10:06,658 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 181 DAG size of output: 144 [2020-10-13 05:10:06,979 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 05:10:07,197 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-13 05:10:07,370 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 05:10:09,552 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 146 DAG size of output: 135 [2020-10-13 05:10:10,246 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 05:10:11,544 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 144 DAG size of output: 134 [2020-10-13 05:10:12,152 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 05:10:13,307 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2020-10-13 05:10:13,823 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-13 05:10:14,849 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 118 [2020-10-13 05:10:15,418 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-13 05:10:16,383 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 110 [2020-10-13 05:10:16,731 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-13 05:10:17,326 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2020-10-13 05:10:17,612 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-13 05:10:18,174 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-10-13 05:10:18,413 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-13 05:10:18,870 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-13 05:10:19,408 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-10-13 05:10:21,353 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2020-10-13 05:10:22,862 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 140 DAG size of output: 138 [2020-10-13 05:10:23,737 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-13 05:10:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:23,842 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-10-13 05:10:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:10:23,843 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 76 [2020-10-13 05:10:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:23,844 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:10:23,845 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:10:23,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=1115, Invalid=6895, Unknown=0, NotChecked=0, Total=8010 [2020-10-13 05:10:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:10:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 05:10:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 05:10:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 05:10:23,859 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2020-10-13 05:10:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:23,860 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 05:10:23,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 05:10:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 05:10:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:10:23,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:23,861 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 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 05:10:23,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:10:23,861 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:23,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1646300723, now seen corresponding path program 22 times [2020-10-13 05:10:23,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:23,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592152505] [2020-10-13 05:10:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:24,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:24,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:24,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:25,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:26,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:10:28,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:28,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:10:28,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:29,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:29,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:29,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:29,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:29,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:29,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:29,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:29,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:29,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 210 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:29,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592152505] [2020-10-13 05:10:29,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:29,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:10:29,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851084382] [2020-10-13 05:10:29,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:10:29,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:10:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:10:29,447 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 28 states. [2020-10-13 05:10:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:30,384 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-13 05:10:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:10:30,385 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-10-13 05:10:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:30,386 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:10:30,386 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 05:10:30,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:10:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 05:10:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-13 05:10:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:10:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 05:10:30,399 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-10-13 05:10:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:30,400 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 05:10:30,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:10:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 05:10:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:10:30,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:30,401 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 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 05:10:30,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:10:30,401 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1770870581, now seen corresponding path program 23 times [2020-10-13 05:10:30,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:30,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434251782] [2020-10-13 05:10:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:30,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:33,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:35,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5521 [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 05:10:35,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:10:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:36,966 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-13 05:10:37,343 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-10-13 05:10:37,572 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-13 05:10:38,089 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 64 [2020-10-13 05:10:38,556 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2020-10-13 05:10:38,993 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-13 05:10:39,564 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2020-10-13 05:10:40,013 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 72 [2020-10-13 05:10:40,453 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2020-10-13 05:10:40,905 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 64 [2020-10-13 05:10:41,399 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2020-10-13 05:10:41,724 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-10-13 05:10:42,070 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-13 05:10:42,401 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-13 05:10:42,731 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-13 05:10:43,072 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-13 05:10:43,446 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2020-10-13 05:10:43,911 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2020-10-13 05:10:44,379 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-13 05:10:44,808 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2020-10-13 05:10:45,173 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-13 05:10:45,663 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2020-10-13 05:10:46,085 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-13 05:10:46,556 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-10-13 05:10:46,899 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-13 05:10:47,249 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-13 05:10:47,968 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-13 05:10:49,042 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-10-13 05:10:50,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:50,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:50,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:50,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:50,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:50,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:50,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:50,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:50,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:50,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:50,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:50,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:50,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:50,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:50,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434251782] [2020-10-13 05:10:50,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:50,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 05:10:50,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807595902] [2020-10-13 05:10:50,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 05:10:50,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 05:10:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2625, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:10:50,425 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 55 states.