/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-industry-pattern/array_of_struct_break.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:12:07,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:12:07,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:12:07,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:12:07,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:12:07,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:12:07,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:12:07,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:12:07,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:12:07,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:12:07,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:12:07,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:12:07,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:12:07,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:12:07,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:12:07,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:12:07,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:12:07,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:12:07,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:12:07,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:12:07,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:12:07,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:12:07,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:12:07,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:12:07,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:12:07,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:12:07,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:12:07,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:12:07,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:12:07,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:12:07,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:12:07,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:12:07,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:12:07,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:12:07,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:12:07,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:12:07,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:12:07,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:12:07,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:12:07,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:12:07,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:12:07,818 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 05:12:07,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:12:07,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:12:07,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:12:07,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:12:07,861 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:12:07,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:12:07,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:12:07,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:12:07,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:12:07,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:12:07,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:12:07,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:12:07,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:12:07,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:12:07,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:12:07,864 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:12:07,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:12:07,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:12:07,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:12:07,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:12:07,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:12:07,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:12:07,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:12:07,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:12:07,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:12:07,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:12:07,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:12:07,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:12:07,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:12:07,867 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 05:12:08,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:12:08,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:12:08,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:12:08,201 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:12:08,201 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:12:08,202 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i [2020-10-13 05:12:08,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6665bc18b/4c22687180ac4f91bf341092a5b93745/FLAG808542014 [2020-10-13 05:12:08,731 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:12:08,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i [2020-10-13 05:12:08,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6665bc18b/4c22687180ac4f91bf341092a5b93745/FLAG808542014 [2020-10-13 05:12:09,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6665bc18b/4c22687180ac4f91bf341092a5b93745 [2020-10-13 05:12:09,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:12:09,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:12:09,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:12:09,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:12:09,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:12:09,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:12:09" (1/1) ... [2020-10-13 05:12:09,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d407afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:09, skipping insertion in model container [2020-10-13 05:12:09,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:12:09" (1/1) ... [2020-10-13 05:12:09,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:12:09,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:12:09,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:12:10,675 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:12:10,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:12:10,719 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:12:10,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10 WrapperNode [2020-10-13 05:12:10,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:12:10,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:12:10,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:12:10,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:12:10,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (1/1) ... [2020-10-13 05:12:10,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:12:10,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:12:10,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:12:10,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:12:10,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (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 05:12:10,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:12:10,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:12:10,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:12:10,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:12:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:12:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:12:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:12:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:12:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:12:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:12:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:12:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:12:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:12:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:12:11,055 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:12:11,055 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:12:11,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:12:11 BoogieIcfgContainer [2020-10-13 05:12:11,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:12:11,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:12:11,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:12:11,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:12:11,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:12:09" (1/3) ... [2020-10-13 05:12:11,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48df6de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:12:11, skipping insertion in model container [2020-10-13 05:12:11,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:12:10" (2/3) ... [2020-10-13 05:12:11,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48df6de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:12:11, skipping insertion in model container [2020-10-13 05:12:11,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:12:11" (3/3) ... [2020-10-13 05:12:11,071 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2020-10-13 05:12:11,085 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:12:11,095 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:12:11,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:12:11,168 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:12:11,168 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:12:11,169 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:12:11,169 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:12:11,169 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:12:11,169 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:12:11,169 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:12:11,169 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:12:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-13 05:12:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:12:11,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:11,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:11,212 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2020-10-13 05:12:11,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:11,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83826038] [2020-10-13 05:12:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:12:11,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:11,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 05:12:11,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:12:11,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:11,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:12:11,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:11,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 05:12:11,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:11,671 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 05:12:11,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83826038] [2020-10-13 05:12:11,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:12:11,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:12:11,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543059631] [2020-10-13 05:12:11,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:12:11,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:12:11,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:12:11,700 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-13 05:12:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:11,806 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-13 05:12:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:12:11,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 05:12:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:11,818 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:12:11,819 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:12:11,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:12:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:12:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-13 05:12:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:12:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 05:12:11,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-13 05:12:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:11,874 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 05:12:11,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:12:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 05:12:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:12:11,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:11,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:11,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:12:11,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2020-10-13 05:12:11,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:11,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571716283] [2020-10-13 05:12:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:12:11,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:11,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 05:12:11,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:12:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:12:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:12,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:12,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:12,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 05:12:12,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:12,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:12,089 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 05:12:12,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571716283] [2020-10-13 05:12:12,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:12:12,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:12:12,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785918326] [2020-10-13 05:12:12,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:12:12,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:12:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:12:12,097 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-13 05:12:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:12,248 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-13 05:12:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:12:12,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 05:12:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:12,250 INFO L225 Difference]: With dead ends: 52 [2020-10-13 05:12:12,250 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:12:12,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:12:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:12:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2020-10-13 05:12:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:12:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 05:12:12,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-13 05:12:12,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:12,260 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 05:12:12,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:12:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 05:12:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:12:12,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:12,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:12,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:12:12,262 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:12,263 INFO L82 PathProgramCache]: Analyzing trace with hash -796107231, now seen corresponding path program 1 times [2020-10-13 05:12:12,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:12,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209671610] [2020-10-13 05:12:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:12:12,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:12,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 05:12:12,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:12:12,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:12:12,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:12:12,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:12,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:12,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:12,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:12:12,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:12,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:12,370 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 05:12:12,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209671610] [2020-10-13 05:12:12,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:12:12,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:12:12,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295337822] [2020-10-13 05:12:12,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:12:12,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:12,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:12:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:12:12,373 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 05:12:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:12,454 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-13 05:12:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:12:12,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 05:12:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:12,456 INFO L225 Difference]: With dead ends: 42 [2020-10-13 05:12:12,456 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 05:12:12,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:12:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 05:12:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 05:12:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:12:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 05:12:12,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-10-13 05:12:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:12,538 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 05:12:12,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:12:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 05:12:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:12:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:12,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:12,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:12:12,540 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2000433480, now seen corresponding path program 1 times [2020-10-13 05:12:12,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:12,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401888463] [2020-10-13 05:12:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:12:12,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:12,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-13 05:12:12,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:12:12,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:12,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:12:12,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:12,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:12,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:12,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:12:12,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:12,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401888463] [2020-10-13 05:12:12,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:12,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:12:12,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373923967] [2020-10-13 05:12:12,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:12:12,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:12:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:12:12,890 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-13 05:12:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:12,993 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-13 05:12:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:12:12,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 05:12:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:12,995 INFO L225 Difference]: With dead ends: 49 [2020-10-13 05:12:12,995 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 05:12:12,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:12:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 05:12:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-10-13 05:12:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:12:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 05:12:13,002 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2020-10-13 05:12:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:13,003 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 05:12:13,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:12:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 05:12:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:12:13,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:13,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:13,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:12:13,005 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1356244077, now seen corresponding path program 2 times [2020-10-13 05:12:13,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:13,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785992348] [2020-10-13 05:12:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:13,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:12:13,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-13 05:12:13,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:12:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:12:13,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:13,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:13,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:13,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 05:12:13,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:13,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:13,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:13,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785992348] [2020-10-13 05:12:13,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:13,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:12:13,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738397203] [2020-10-13 05:12:13,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:12:13,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:12:13,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:12:13,322 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-13 05:12:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:13,448 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-13 05:12:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:12:13,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 05:12:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:13,450 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:12:13,450 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:12:13,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:12:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:12:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2020-10-13 05:12:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:12:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 05:12:13,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 20 [2020-10-13 05:12:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:13,458 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 05:12:13,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:12:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 05:12:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:12:13,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:13,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:13,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:12:13,459 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash 223617832, now seen corresponding path program 3 times [2020-10-13 05:12:13,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:13,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725040134] [2020-10-13 05:12:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:13,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:13,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:12:13,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:13,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-13 05:12:13,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:12:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:12:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:13,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:13,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:13,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:12:13,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:13,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725040134] [2020-10-13 05:12:13,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:13,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:12:13,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69616930] [2020-10-13 05:12:13,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:12:13,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:13,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:12:13,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:12:13,938 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-10-13 05:12:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:14,111 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-13 05:12:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:12:14,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-13 05:12:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:14,114 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:12:14,114 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 05:12:14,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:12:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 05:12:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2020-10-13 05:12:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:12:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 05:12:14,127 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2020-10-13 05:12:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:14,127 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 05:12:14,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:12:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 05:12:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:12:14,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:14,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:14,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:12:14,130 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash -581769587, now seen corresponding path program 4 times [2020-10-13 05:12:14,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:14,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107705576] [2020-10-13 05:12:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:14,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:12:14,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:14,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-13 05:12:14,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:12:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:14,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:12:14,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:14,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:14,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:14,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:14,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:14,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:12:14,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:14,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:14,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:14,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:14,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:14,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107705576] [2020-10-13 05:12:14,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:14,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:12:14,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156925343] [2020-10-13 05:12:14,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:12:14,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:12:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:12:14,910 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-13 05:12:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:15,143 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-13 05:12:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:12:15,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-13 05:12:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:15,145 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:12:15,145 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 05:12:15,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:12:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 05:12:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-10-13 05:12:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:12:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 05:12:15,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 26 [2020-10-13 05:12:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:15,164 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 05:12:15,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:12:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 05:12:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:12:15,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:15,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:15,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:12:15,167 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2103913736, now seen corresponding path program 5 times [2020-10-13 05:12:15,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:15,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549568142] [2020-10-13 05:12:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:15,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:15,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:12:15,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-13 05:12:15,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:15,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:12:15,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:15,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:12:15,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:15,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:15,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:15,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:15,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:12:15,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:15,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549568142] [2020-10-13 05:12:15,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:15,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:12:15,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862354696] [2020-10-13 05:12:15,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:12:15,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:15,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:12:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:12:15,823 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 9 states. [2020-10-13 05:12:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:16,130 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-13 05:12:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:12:16,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-13 05:12:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:16,132 INFO L225 Difference]: With dead ends: 81 [2020-10-13 05:12:16,132 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:12:16,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:12:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:12:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2020-10-13 05:12:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:12:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 05:12:16,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2020-10-13 05:12:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:16,140 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 05:12:16,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:12:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 05:12:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:12:16,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:16,142 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:16,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:12:16,142 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 350032045, now seen corresponding path program 6 times [2020-10-13 05:12:16,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:16,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415224053] [2020-10-13 05:12:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:16,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:16,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:12:17,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:17,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-13 05:12:17,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:12:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:12:17,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:17,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:17,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:17,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:12:17,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:17,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:17,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415224053] [2020-10-13 05:12:17,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:17,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:12:17,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997358973] [2020-10-13 05:12:17,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:12:17,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:12:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:12:17,441 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-13 05:12:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:17,709 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-13 05:12:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:12:17,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 05:12:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:17,712 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:12:17,712 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:12:17,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:12:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:12:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2020-10-13 05:12:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:12:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 05:12:17,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 32 [2020-10-13 05:12:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:17,737 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 05:12:17,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:12:17,737 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 05:12:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:12:17,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:17,740 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:17,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:12:17,741 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:17,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1262268696, now seen corresponding path program 7 times [2020-10-13 05:12:17,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:17,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267939347] [2020-10-13 05:12:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:18,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:12:18,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:18,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-13 05:12:18,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:12:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:12:18,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:18,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:18,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:18,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:18,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:12:18,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:18,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:18,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:18,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:18,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:18,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267939347] [2020-10-13 05:12:18,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:18,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:12:18,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801123684] [2020-10-13 05:12:18,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:12:18,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:18,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:12:18,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:12:18,734 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2020-10-13 05:12:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:18,997 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-13 05:12:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:12:18,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-13 05:12:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:18,999 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:12:18,999 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 05:12:19,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 05:12:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2020-10-13 05:12:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:12:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 05:12:19,006 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 35 [2020-10-13 05:12:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:19,006 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 05:12:19,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:12:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 05:12:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:12:19,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:19,007 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:19,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:12:19,008 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1600594637, now seen corresponding path program 8 times [2020-10-13 05:12:19,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:19,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358421697] [2020-10-13 05:12:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:20,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:12:20,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:20,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-13 05:12:20,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:20,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:12:20,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:20,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:12:20,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:20,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:20,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:20,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:20,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:20,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:20,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:20,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:20,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:20,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358421697] [2020-10-13 05:12:20,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:20,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:12:20,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814132127] [2020-10-13 05:12:20,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:12:20,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:12:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:20,164 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2020-10-13 05:12:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:20,389 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-13 05:12:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:12:20,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 05:12:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:20,391 INFO L225 Difference]: With dead ends: 105 [2020-10-13 05:12:20,391 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:12:20,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:12:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:12:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2020-10-13 05:12:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:12:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 05:12:20,404 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 38 [2020-10-13 05:12:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:20,404 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 05:12:20,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:12:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 05:12:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:12:20,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:20,407 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:20,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:12:20,407 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash -298415928, now seen corresponding path program 9 times [2020-10-13 05:12:20,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:20,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855817504] [2020-10-13 05:12:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:20,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:21,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:12:21,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:21,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-13 05:12:21,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:12:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:12:21,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:21,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:21,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:21,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:21,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:21,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:21,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855817504] [2020-10-13 05:12:21,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:21,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:12:21,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080061246] [2020-10-13 05:12:21,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:12:21,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:12:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:12:21,884 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-10-13 05:12:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:22,131 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-10-13 05:12:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:12:22,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-13 05:12:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:22,133 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:12:22,133 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 05:12:22,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 05:12:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 49. [2020-10-13 05:12:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:12:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 05:12:22,141 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 41 [2020-10-13 05:12:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:22,141 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 05:12:22,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:12:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 05:12:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:12:22,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:22,142 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:22,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:12:22,143 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -412934931, now seen corresponding path program 10 times [2020-10-13 05:12:22,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:22,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272952142] [2020-10-13 05:12:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:22,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:23,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:12:23,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:23,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-13 05:12:23,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:12:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:12:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:12:23,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:23,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:23,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:23,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:23,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:23,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:23,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:23,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272952142] [2020-10-13 05:12:23,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:23,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:12:23,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160571337] [2020-10-13 05:12:23,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:12:23,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:12:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:23,626 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 14 states. [2020-10-13 05:12:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:23,883 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2020-10-13 05:12:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:12:23,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 05:12:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:23,885 INFO L225 Difference]: With dead ends: 121 [2020-10-13 05:12:23,886 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:12:23,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:12:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:12:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 52. [2020-10-13 05:12:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:12:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 05:12:23,899 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 44 [2020-10-13 05:12:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:23,899 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 05:12:23,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:12:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 05:12:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:12:23,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:23,903 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:23,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:12:23,904 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1844520280, now seen corresponding path program 11 times [2020-10-13 05:12:23,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:23,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603789291] [2020-10-13 05:12:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:25,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:12:25,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:25,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-13 05:12:25,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:12:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:12:25,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:25,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:25,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:25,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:25,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:25,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:25,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:25,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:25,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:25,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:25,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:25,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603789291] [2020-10-13 05:12:25,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:25,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:12:25,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538373023] [2020-10-13 05:12:25,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:12:25,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:25,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:12:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:12:25,548 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 15 states. [2020-10-13 05:12:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:25,900 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-10-13 05:12:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:12:25,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-13 05:12:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:25,902 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:12:25,902 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 05:12:25,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:12:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 05:12:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2020-10-13 05:12:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:12:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 05:12:25,916 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 47 [2020-10-13 05:12:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:25,917 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 05:12:25,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:12:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 05:12:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:12:25,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:25,919 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:25,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:12:25,920 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1178403059, now seen corresponding path program 12 times [2020-10-13 05:12:25,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:25,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333112832] [2020-10-13 05:12:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:28,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:12:28,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:28,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2111 [2020-10-13 05:12:28,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:28,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:12:28,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:28,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:12:28,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:28,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:28,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:28,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:28,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333112832] [2020-10-13 05:12:28,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:28,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:12:28,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584100148] [2020-10-13 05:12:28,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:12:28,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:12:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:12:28,230 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 16 states. [2020-10-13 05:12:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:28,584 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-10-13 05:12:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:12:28,585 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-13 05:12:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:28,586 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:12:28,587 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:12:28,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:12:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:12:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2020-10-13 05:12:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:12:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 05:12:28,601 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 50 [2020-10-13 05:12:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:28,601 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 05:12:28,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:12:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 05:12:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:12:28,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:28,604 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:28,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:12:28,605 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:28,606 INFO L82 PathProgramCache]: Analyzing trace with hash 370820232, now seen corresponding path program 13 times [2020-10-13 05:12:28,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:28,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135732598] [2020-10-13 05:12:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:28,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:30,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:12:30,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:30,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-13 05:12:30,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:12:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:12:30,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:30,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:30,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:30,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:30,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:30,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 05:12:30,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:30,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:30,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:30,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:30,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:30,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135732598] [2020-10-13 05:12:30,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:30,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:12:30,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185601344] [2020-10-13 05:12:30,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:12:30,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:12:30,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:12:30,925 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 17 states. [2020-10-13 05:12:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:31,254 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2020-10-13 05:12:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:12:31,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-13 05:12:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:31,255 INFO L225 Difference]: With dead ends: 145 [2020-10-13 05:12:31,256 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:12:31,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:12:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:12:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2020-10-13 05:12:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:12:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 05:12:31,266 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 53 [2020-10-13 05:12:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:31,267 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 05:12:31,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:12:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 05:12:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:12:31,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:31,268 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:31,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:12:31,268 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:31,268 INFO L82 PathProgramCache]: Analyzing trace with hash -436680403, now seen corresponding path program 14 times [2020-10-13 05:12:31,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:31,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320145170] [2020-10-13 05:12:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:31,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:33,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:12:33,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:33,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2219 [2020-10-13 05:12:33,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:33,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:12:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:12:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:33,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:33,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:33,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:33,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:12:33,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:33,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:33,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:12:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:33,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320145170] [2020-10-13 05:12:33,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:33,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:12:33,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114559790] [2020-10-13 05:12:33,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:12:33,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:12:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:12:33,709 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 18 states. [2020-10-13 05:12:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:34,054 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2020-10-13 05:12:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:12:34,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-10-13 05:12:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:34,056 INFO L225 Difference]: With dead ends: 153 [2020-10-13 05:12:34,056 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 05:12:34,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:12:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 05:12:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2020-10-13 05:12:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:12:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 05:12:34,065 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 56 [2020-10-13 05:12:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:34,066 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 05:12:34,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:12:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 05:12:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:12:34,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:34,067 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:34,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:12:34,068 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash -576272792, now seen corresponding path program 15 times [2020-10-13 05:12:34,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:34,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747677459] [2020-10-13 05:12:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:34,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:36,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:12:36,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:36,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2723 [2020-10-13 05:12:36,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:12:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:12:36,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:36,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:37,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:37,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:37,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:37,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:37,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:37,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747677459] [2020-10-13 05:12:37,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:37,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:12:37,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612455254] [2020-10-13 05:12:37,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:12:37,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:12:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:12:37,023 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 19 states. [2020-10-13 05:12:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:37,365 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2020-10-13 05:12:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:12:37,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-13 05:12:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:37,367 INFO L225 Difference]: With dead ends: 161 [2020-10-13 05:12:37,367 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 05:12:37,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:12:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 05:12:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2020-10-13 05:12:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:12:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 05:12:37,373 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-10-13 05:12:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:37,373 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 05:12:37,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:12:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 05:12:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:12:37,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:37,374 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:37,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:12:37,374 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1644790963, now seen corresponding path program 16 times [2020-10-13 05:12:37,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:37,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075846065] [2020-10-13 05:12:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:40,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:40,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:12:40,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:40,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2926 [2020-10-13 05:12:40,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:12:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:12:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:40,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:40,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:40,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:40,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:12:40,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:40,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075846065] [2020-10-13 05:12:40,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:40,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:12:40,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328116956] [2020-10-13 05:12:40,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:12:40,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:12:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:12:40,561 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 20 states. [2020-10-13 05:12:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:41,022 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2020-10-13 05:12:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:12:41,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-13 05:12:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:41,025 INFO L225 Difference]: With dead ends: 169 [2020-10-13 05:12:41,025 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 05:12:41,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:12:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 05:12:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 70. [2020-10-13 05:12:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:12:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 05:12:41,042 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 62 [2020-10-13 05:12:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:41,043 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 05:12:41,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:12:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 05:12:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:12:41,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:41,048 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:41,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:12:41,050 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash 427974728, now seen corresponding path program 17 times [2020-10-13 05:12:41,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:41,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079753805] [2020-10-13 05:12:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:41,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:44,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:44,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:12:44,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:44,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3250 [2020-10-13 05:12:44,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:44,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:12:44,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:44,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:12:44,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:44,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:44,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:44,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:44,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:44,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:12:44,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:44,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:44,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:44,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:44,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079753805] [2020-10-13 05:12:44,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:44,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:12:44,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694013515] [2020-10-13 05:12:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:12:44,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:12:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:12:44,590 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 21 states. [2020-10-13 05:12:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:45,168 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2020-10-13 05:12:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:12:45,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-13 05:12:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:45,170 INFO L225 Difference]: With dead ends: 177 [2020-10-13 05:12:45,170 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 05:12:45,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:12:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 05:12:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 73. [2020-10-13 05:12:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:12:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 05:12:45,177 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 65 [2020-10-13 05:12:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:45,178 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 05:12:45,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:12:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 05:12:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:12:45,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:45,179 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:45,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:12:45,179 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1445860717, now seen corresponding path program 18 times [2020-10-13 05:12:45,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:45,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829647707] [2020-10-13 05:12:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:45,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:45,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:47,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:47,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:12:47,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:47,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2612 [2020-10-13 05:12:47,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:12:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:12:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:48,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:48,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:48,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:48,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:48,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:48,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:48,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829647707] [2020-10-13 05:12:48,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:48,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:12:48,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065160058] [2020-10-13 05:12:48,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:12:48,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:12:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:12:48,080 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 22 states. [2020-10-13 05:12:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:48,451 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-13 05:12:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:12:48,452 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-10-13 05:12:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:48,454 INFO L225 Difference]: With dead ends: 185 [2020-10-13 05:12:48,454 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 05:12:48,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:12:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 05:12:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 76. [2020-10-13 05:12:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:12:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 05:12:48,462 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 68 [2020-10-13 05:12:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:48,462 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 05:12:48,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:12:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 05:12:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:12:48,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:48,463 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:48,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:12:48,463 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:48,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1476718040, now seen corresponding path program 19 times [2020-10-13 05:12:48,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:48,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201179389] [2020-10-13 05:12:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:48,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:52,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:12:52,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3937 [2020-10-13 05:12:52,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:12:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:12:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:52,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:52,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201179389] [2020-10-13 05:12:52,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:52,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:12:52,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303160596] [2020-10-13 05:12:52,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:12:52,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:12:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:12:52,710 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 23 states. [2020-10-13 05:12:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:53,152 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2020-10-13 05:12:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:12:53,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-10-13 05:12:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:53,155 INFO L225 Difference]: With dead ends: 193 [2020-10-13 05:12:53,156 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 05:12:53,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:12:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 05:12:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 79. [2020-10-13 05:12:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:12:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 05:12:53,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 71 [2020-10-13 05:12:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:53,165 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 05:12:53,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:12:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 05:12:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:12:53,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:53,166 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:53,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:12:53,167 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash -443443315, now seen corresponding path program 20 times [2020-10-13 05:12:53,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:53,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209910635] [2020-10-13 05:12:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:55,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2725 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:12:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:56,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:56,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:56,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:56,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209910635] [2020-10-13 05:12:56,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:56,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:12:56,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776371920] [2020-10-13 05:12:56,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:12:56,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:12:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:12:56,237 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 24 states. [2020-10-13 05:12:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:56,788 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2020-10-13 05:12:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:12:56,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 74 [2020-10-13 05:12:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:56,791 INFO L225 Difference]: With dead ends: 201 [2020-10-13 05:12:56,792 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 05:12:56,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:12:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 05:12:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 82. [2020-10-13 05:12:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:12:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 05:12:56,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 74 [2020-10-13 05:12:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:56,799 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 05:12:56,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:12:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 05:12:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:12:56,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:56,801 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:56,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:12:56,801 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash -186721272, now seen corresponding path program 21 times [2020-10-13 05:12:56,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:56,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643701508] [2020-10-13 05:12:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:56,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:57,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:00,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:00,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3332 [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 05:13:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:00,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:00,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:00,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:00,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:00,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:00,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:00,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:00,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:00,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:00,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:00,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643701508] [2020-10-13 05:13:00,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:00,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:13:00,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427582041] [2020-10-13 05:13:00,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:13:00,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:13:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:13:00,526 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 25 states. [2020-10-13 05:13:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:01,127 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2020-10-13 05:13:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:13:01,127 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-10-13 05:13:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:01,129 INFO L225 Difference]: With dead ends: 209 [2020-10-13 05:13:01,129 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:13:01,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:13:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:13:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 85. [2020-10-13 05:13:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:13:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-13 05:13:01,136 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2020-10-13 05:13:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:01,136 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-13 05:13:01,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:13:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-13 05:13:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 05:13:01,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:01,137 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:01,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:13:01,138 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1517092435, now seen corresponding path program 22 times [2020-10-13 05:13:01,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:01,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552354787] [2020-10-13 05:13:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:01,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:05,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:05,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:13:05,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:05,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4114 [2020-10-13 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:05,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:05,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552354787] [2020-10-13 05:13:05,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:05,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:13:05,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550492116] [2020-10-13 05:13:05,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:13:05,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:13:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:13:05,627 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2020-10-13 05:13:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:06,153 INFO L93 Difference]: Finished difference Result 217 states and 242 transitions. [2020-10-13 05:13:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:13:06,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 80 [2020-10-13 05:13:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:06,159 INFO L225 Difference]: With dead ends: 217 [2020-10-13 05:13:06,159 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 05:13:06,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:13:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 05:13:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 88. [2020-10-13 05:13:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:13:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 05:13:06,178 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 80 [2020-10-13 05:13:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:06,178 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 05:13:06,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:13:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 05:13:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:13:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:06,182 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:06,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:13:06,182 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash -646201880, now seen corresponding path program 23 times [2020-10-13 05:13:06,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:06,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996614371] [2020-10-13 05:13:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:10,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4639 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 05:13:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:11,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:11,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:11,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996614371] [2020-10-13 05:13:11,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:11,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:13:11,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767600602] [2020-10-13 05:13:11,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:13:11,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:13:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:13:11,219 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 27 states. [2020-10-13 05:13:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:11,841 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2020-10-13 05:13:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:13:11,842 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 83 [2020-10-13 05:13:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:11,843 INFO L225 Difference]: With dead ends: 225 [2020-10-13 05:13:11,843 INFO L226 Difference]: Without dead ends: 213 [2020-10-13 05:13:11,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:13:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-13 05:13:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 91. [2020-10-13 05:13:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 05:13:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-13 05:13:11,850 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 83 [2020-10-13 05:13:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:11,851 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-13 05:13:11,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:13:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-13 05:13:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:13:11,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:11,852 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:11,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:13:11,852 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1843113011, now seen corresponding path program 24 times [2020-10-13 05:13:11,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:11,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305998068] [2020-10-13 05:13:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:11,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:16,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:13:16,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:16,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:13:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 05:13:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:17,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:17,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:17,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:17,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:17,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:17,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305998068] [2020-10-13 05:13:17,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:17,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:13:17,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971246738] [2020-10-13 05:13:17,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:13:17,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:13:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:13:17,288 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 28 states. [2020-10-13 05:13:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:17,962 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-10-13 05:13:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:13:17,963 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-10-13 05:13:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:17,964 INFO L225 Difference]: With dead ends: 233 [2020-10-13 05:13:17,964 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 05:13:17,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:13:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 05:13:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 94. [2020-10-13 05:13:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 05:13:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-13 05:13:17,972 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 86 [2020-10-13 05:13:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:17,973 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-13 05:13:17,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:13:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-13 05:13:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:13:17,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:17,974 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:17,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:13:17,974 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2090842056, now seen corresponding path program 25 times [2020-10-13 05:13:17,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:17,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669884052] [2020-10-13 05:13:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:17,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 05:13:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:23,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:23,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:23,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:23,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:23,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669884052] [2020-10-13 05:13:23,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:23,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:13:23,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222360818] [2020-10-13 05:13:23,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:13:23,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:23,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:13:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:13:23,427 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 29 states. [2020-10-13 05:13:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:24,100 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2020-10-13 05:13:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:13:24,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 89 [2020-10-13 05:13:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:24,103 INFO L225 Difference]: With dead ends: 241 [2020-10-13 05:13:24,104 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 05:13:24,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:13:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 05:13:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 97. [2020-10-13 05:13:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:13:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-13 05:13:24,110 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2020-10-13 05:13:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:24,111 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-13 05:13:24,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:13:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-13 05:13:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 05:13:24,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:24,112 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:24,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:13:24,112 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:24,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1773637101, now seen corresponding path program 26 times [2020-10-13 05:13:24,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:24,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773221505] [2020-10-13 05:13:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:24,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:29,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 05:13:29,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:29,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:29,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:29,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:29,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:29,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773221505] [2020-10-13 05:13:29,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:29,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:13:29,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532241799] [2020-10-13 05:13:29,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:13:29,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:13:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:13:29,585 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 30 states. [2020-10-13 05:13:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:30,198 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2020-10-13 05:13:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:13:30,199 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 92 [2020-10-13 05:13:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:30,201 INFO L225 Difference]: With dead ends: 249 [2020-10-13 05:13:30,201 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 05:13:30,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:13:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 05:13:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 100. [2020-10-13 05:13:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:13:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 05:13:30,208 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 92 [2020-10-13 05:13:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:30,208 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 05:13:30,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:13:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 05:13:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:13:30,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:30,209 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:30,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:13:30,210 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 848873896, now seen corresponding path program 27 times [2020-10-13 05:13:30,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:30,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286142373] [2020-10-13 05:13:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:30,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:30,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:35,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 05:13:35,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:35,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:35,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:13:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 05:13:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:35,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:35,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:35,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:13:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:35,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286142373] [2020-10-13 05:13:35,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:35,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:13:35,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708986006] [2020-10-13 05:13:35,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:13:35,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:13:35,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:13:35,724 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 31 states. [2020-10-13 05:13:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:36,362 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2020-10-13 05:13:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:13:36,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2020-10-13 05:13:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:36,365 INFO L225 Difference]: With dead ends: 257 [2020-10-13 05:13:36,365 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 05:13:36,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:13:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 05:13:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 103. [2020-10-13 05:13:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 05:13:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-13 05:13:36,372 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 95 [2020-10-13 05:13:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:36,372 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-13 05:13:36,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:13:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-13 05:13:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 05:13:36,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:36,374 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:36,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:13:36,374 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash -851529715, now seen corresponding path program 28 times [2020-10-13 05:13:36,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:36,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206959300] [2020-10-13 05:13:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:36,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:41,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 05:13:41,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:41,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:41,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:41,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206959300] [2020-10-13 05:13:41,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:41,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:13:41,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907518355] [2020-10-13 05:13:41,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:13:41,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:13:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:13:41,900 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 32 states. [2020-10-13 05:13:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:42,648 INFO L93 Difference]: Finished difference Result 265 states and 296 transitions. [2020-10-13 05:13:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:13:42,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 98 [2020-10-13 05:13:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:42,651 INFO L225 Difference]: With dead ends: 265 [2020-10-13 05:13:42,651 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 05:13:42,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:13:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 05:13:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 106. [2020-10-13 05:13:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 05:13:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-13 05:13:42,659 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 98 [2020-10-13 05:13:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:42,659 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-13 05:13:42,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:13:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-13 05:13:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:13:42,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:42,661 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:42,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:13:42,661 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1563751304, now seen corresponding path program 29 times [2020-10-13 05:13:42,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102904359] [2020-10-13 05:13:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:42,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:47,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 05:13:47,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:47,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:13:47,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:13:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 05:13:47,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:48,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:48,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:48,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:48,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:48,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102904359] [2020-10-13 05:13:48,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:48,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:13:48,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954685508] [2020-10-13 05:13:48,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:13:48,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:13:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:13:48,253 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 33 states. [2020-10-13 05:13:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:49,088 INFO L93 Difference]: Finished difference Result 273 states and 305 transitions. [2020-10-13 05:13:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:13:49,089 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 101 [2020-10-13 05:13:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:49,091 INFO L225 Difference]: With dead ends: 273 [2020-10-13 05:13:49,091 INFO L226 Difference]: Without dead ends: 261 [2020-10-13 05:13:49,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:13:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-13 05:13:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 109. [2020-10-13 05:13:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 05:13:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-13 05:13:49,099 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 101 [2020-10-13 05:13:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:49,100 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-13 05:13:49,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:13:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-13 05:13:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 05:13:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:49,101 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:49,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:13:49,101 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1613478445, now seen corresponding path program 30 times [2020-10-13 05:13:49,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:49,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946741108] [2020-10-13 05:13:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:49,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:49,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:54,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 05:13:54,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:13:54,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:13:54,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:54,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:13:54,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:13:54,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 05:13:54,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:54,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:54,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:54,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:54,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:54,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:54,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:54,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:54,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:54,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946741108] [2020-10-13 05:13:54,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:54,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:13:54,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286577417] [2020-10-13 05:13:54,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:13:54,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:13:54,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:13:54,701 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 34 states. [2020-10-13 05:13:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:55,614 INFO L93 Difference]: Finished difference Result 281 states and 314 transitions. [2020-10-13 05:13:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:13:55,615 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2020-10-13 05:13:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:55,617 INFO L225 Difference]: With dead ends: 281 [2020-10-13 05:13:55,617 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 05:13:55,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:13:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 05:13:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 112. [2020-10-13 05:13:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 05:13:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-13 05:13:55,627 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 104 [2020-10-13 05:13:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:55,627 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-13 05:13:55,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:13:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-13 05:13:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 05:13:55,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:55,628 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:55,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:13:55,629 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1271018856, now seen corresponding path program 31 times [2020-10-13 05:13:55,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:55,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957026833] [2020-10-13 05:13:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:55,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:55,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:00,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:00,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 05:14:00,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:00,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:14:00,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:14:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 05:14:00,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:01,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:01,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:01,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957026833] [2020-10-13 05:14:01,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:01,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:14:01,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177094054] [2020-10-13 05:14:01,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:14:01,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:14:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:14:01,250 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 35 states. [2020-10-13 05:14:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:02,180 INFO L93 Difference]: Finished difference Result 289 states and 323 transitions. [2020-10-13 05:14:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:14:02,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 107 [2020-10-13 05:14:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:02,183 INFO L225 Difference]: With dead ends: 289 [2020-10-13 05:14:02,183 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 05:14:02,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:14:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 05:14:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 115. [2020-10-13 05:14:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 05:14:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-13 05:14:02,192 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 107 [2020-10-13 05:14:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:02,193 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-13 05:14:02,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:14:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-13 05:14:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:14:02,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:02,194 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:02,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:14:02,194 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash -395269043, now seen corresponding path program 32 times [2020-10-13 05:14:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:02,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039889896] [2020-10-13 05:14:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:07,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:07,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 05:14:07,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:07,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:07,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:07,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:07,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:07,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:07,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:07,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:07,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039889896] [2020-10-13 05:14:07,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:07,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:14:07,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794115551] [2020-10-13 05:14:07,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:14:07,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:14:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:14:07,925 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 36 states. [2020-10-13 05:14:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:08,835 INFO L93 Difference]: Finished difference Result 297 states and 332 transitions. [2020-10-13 05:14:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:14:08,838 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 110 [2020-10-13 05:14:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:08,839 INFO L225 Difference]: With dead ends: 297 [2020-10-13 05:14:08,839 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 05:14:08,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:14:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 05:14:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 118. [2020-10-13 05:14:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:14:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-10-13 05:14:08,848 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 110 [2020-10-13 05:14:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:08,848 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-10-13 05:14:08,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:14:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-10-13 05:14:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 05:14:08,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:08,850 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:08,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:14:08,850 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 453939016, now seen corresponding path program 33 times [2020-10-13 05:14:08,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:08,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526205021] [2020-10-13 05:14:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:08,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:10,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:13,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:13,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 05:14:13,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:14:13,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:14:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 05:14:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:14,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:14,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:14,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:14,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:14,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:14,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:14,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526205021] [2020-10-13 05:14:14,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:14,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:14:14,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154082114] [2020-10-13 05:14:14,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:14:14,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:14:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:14:14,644 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 37 states. [2020-10-13 05:14:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:15,486 INFO L93 Difference]: Finished difference Result 305 states and 341 transitions. [2020-10-13 05:14:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:14:15,486 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2020-10-13 05:14:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:15,488 INFO L225 Difference]: With dead ends: 305 [2020-10-13 05:14:15,488 INFO L226 Difference]: Without dead ends: 293 [2020-10-13 05:14:15,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:14:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-13 05:14:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 121. [2020-10-13 05:14:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 05:14:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-13 05:14:15,497 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 113 [2020-10-13 05:14:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:15,497 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-13 05:14:15,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:14:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-13 05:14:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:14:15,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:15,499 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:15,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:14:15,499 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1853851245, now seen corresponding path program 34 times [2020-10-13 05:14:15,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:15,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641387119] [2020-10-13 05:14:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:15,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:15,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:14:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 05:14:20,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:21,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:21,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:21,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:21,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641387119] [2020-10-13 05:14:21,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:21,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:14:21,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230656035] [2020-10-13 05:14:21,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:14:21,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:14:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:14:21,224 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 38 states. [2020-10-13 05:14:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:22,020 INFO L93 Difference]: Finished difference Result 313 states and 350 transitions. [2020-10-13 05:14:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:14:22,021 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 116 [2020-10-13 05:14:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:22,024 INFO L225 Difference]: With dead ends: 313 [2020-10-13 05:14:22,024 INFO L226 Difference]: Without dead ends: 301 [2020-10-13 05:14:22,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:14:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-13 05:14:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 124. [2020-10-13 05:14:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 05:14:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-10-13 05:14:22,032 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 116 [2020-10-13 05:14:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:22,033 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-10-13 05:14:22,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:14:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-10-13 05:14:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 05:14:22,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:22,034 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:22,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:14:22,034 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:22,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1788346072, now seen corresponding path program 35 times [2020-10-13 05:14:22,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:22,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073701723] [2020-10-13 05:14:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:22,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:27,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:27,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 05:14:27,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:27,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:14:27,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:14:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-13 05:14:27,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:27,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:27,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073701723] [2020-10-13 05:14:27,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:27,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:14:27,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539223473] [2020-10-13 05:14:27,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:14:27,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:14:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:14:27,845 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 39 states. [2020-10-13 05:14:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:28,684 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2020-10-13 05:14:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:14:28,685 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 119 [2020-10-13 05:14:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:28,687 INFO L225 Difference]: With dead ends: 321 [2020-10-13 05:14:28,687 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 05:14:28,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:14:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 05:14:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 127. [2020-10-13 05:14:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 05:14:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-13 05:14:28,696 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 119 [2020-10-13 05:14:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:28,696 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-13 05:14:28,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:14:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-13 05:14:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 05:14:28,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:28,697 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:28,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:14:28,697 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:28,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1565149325, now seen corresponding path program 36 times [2020-10-13 05:14:28,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:28,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539391706] [2020-10-13 05:14:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:38,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:38,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 05:14:38,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9319 [2020-10-13 05:14:38,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:14:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:38,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 05:14:38,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:38,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:38,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:38,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:38,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:38,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:38,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:14:38,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:38,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539391706] [2020-10-13 05:14:38,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:38,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:14:38,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134604534] [2020-10-13 05:14:38,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:14:38,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:14:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:14:38,870 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 40 states. [2020-10-13 05:14:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:39,761 INFO L93 Difference]: Finished difference Result 329 states and 368 transitions. [2020-10-13 05:14:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:14:39,761 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 122 [2020-10-13 05:14:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:39,764 INFO L225 Difference]: With dead ends: 329 [2020-10-13 05:14:39,764 INFO L226 Difference]: Without dead ends: 317 [2020-10-13 05:14:39,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:14:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-13 05:14:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 130. [2020-10-13 05:14:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 05:14:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-13 05:14:39,771 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 122 [2020-10-13 05:14:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:39,772 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-13 05:14:39,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:14:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-13 05:14:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 05:14:39,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:39,773 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:39,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:14:39,773 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash 312249096, now seen corresponding path program 37 times [2020-10-13 05:14:39,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:39,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523309635] [2020-10-13 05:14:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:44,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:44,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 05:14:44,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-13 05:14:44,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:14:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-13 05:14:44,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:47,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:47,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:47,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:47,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:47,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:14:47,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-13 05:14:47,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523309635] [2020-10-13 05:14:47,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:47,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:14:47,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820026077] [2020-10-13 05:14:47,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:14:47,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:14:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:14:47,429 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 9 states. [2020-10-13 05:14:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:47,656 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2020-10-13 05:14:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:14:47,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2020-10-13 05:14:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:47,658 INFO L225 Difference]: With dead ends: 141 [2020-10-13 05:14:47,658 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:14:47,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:14:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:14:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-13 05:14:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 05:14:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-13 05:14:47,664 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 125 [2020-10-13 05:14:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:47,665 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-13 05:14:47,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:14:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-13 05:14:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 05:14:47,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:47,667 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:47,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:14:47,667 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2137623665, now seen corresponding path program 1 times [2020-10-13 05:14:47,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:47,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226256200] [2020-10-13 05:14:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:59,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:59,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:14:59,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:59,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11397 [2020-10-13 05:14:59,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:59,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:14:59,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:14:59,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 05:14:59,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:59,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:59,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:59,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:59,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:59,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:59,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:14:59,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-13 05:14:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:59,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:59,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:59,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 2 proven. 2035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:14:59,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226256200] [2020-10-13 05:14:59,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:59,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:14:59,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828716647] [2020-10-13 05:14:59,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:14:59,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:14:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:14:59,948 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 41 states. [2020-10-13 05:15:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:00,874 INFO L93 Difference]: Finished difference Result 348 states and 387 transitions. [2020-10-13 05:15:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:15:00,874 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-10-13 05:15:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:00,877 INFO L225 Difference]: With dead ends: 348 [2020-10-13 05:15:00,877 INFO L226 Difference]: Without dead ends: 329 [2020-10-13 05:15:00,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:15:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-13 05:15:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 140. [2020-10-13 05:15:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 05:15:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-10-13 05:15:00,887 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 134 [2020-10-13 05:15:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:00,887 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-10-13 05:15:00,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:15:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-10-13 05:15:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 05:15:00,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:00,889 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:00,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:15:00,889 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:00,889 INFO L82 PathProgramCache]: Analyzing trace with hash 710733420, now seen corresponding path program 2 times [2020-10-13 05:15:00,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:00,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495185220] [2020-10-13 05:15:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:14,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:14,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 05:15:14,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:14,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13386 [2020-10-13 05:15:14,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:14,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:15:14,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:14,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-13 05:15:14,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:17,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:17,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:17,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:17,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:17,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-13 05:15:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:17,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:17,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:17,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:15:17,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:15:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2152 backedges. 2 proven. 188 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-13 05:15:17,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495185220] [2020-10-13 05:15:17,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:17,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:15:17,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614535196] [2020-10-13 05:15:17,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:15:17,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:17,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:15:17,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:15:17,328 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 11 states. [2020-10-13 05:15:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:17,678 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2020-10-13 05:15:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:15:17,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 137 [2020-10-13 05:15:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:17,680 INFO L225 Difference]: With dead ends: 153 [2020-10-13 05:15:17,680 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 05:15:17,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:15:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 05:15:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-13 05:15:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 05:15:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-10-13 05:15:17,689 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 137 [2020-10-13 05:15:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:17,689 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-10-13 05:15:17,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:15:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-10-13 05:15:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 05:15:17,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:17,691 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:17,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:15:17,691 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash -216483443, now seen corresponding path program 3 times [2020-10-13 05:15:17,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:17,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100666826] [2020-10-13 05:15:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:24,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7252 [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-13 05:15:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-13 05:15:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:15:27,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-13 05:15:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:15:27,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 4 proven. 303 refuted. 0 times theorem prover too weak. 1859 trivial. 0 not checked. [2020-10-13 05:15:27,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100666826] [2020-10-13 05:15:27,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:27,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:15:27,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201642096] [2020-10-13 05:15:27,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:15:27,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:15:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:15:27,785 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 13 states. [2020-10-13 05:15:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:28,292 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2020-10-13 05:15:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:15:28,293 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 146 [2020-10-13 05:15:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:28,295 INFO L225 Difference]: With dead ends: 162 [2020-10-13 05:15:28,295 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 05:15:28,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:15:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 05:15:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-13 05:15:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 05:15:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2020-10-13 05:15:28,308 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 146 [2020-10-13 05:15:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:28,310 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2020-10-13 05:15:28,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:15:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2020-10-13 05:15:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 05:15:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:28,312 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:28,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:15:28,314 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2031557748, now seen corresponding path program 4 times [2020-10-13 05:15:28,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:28,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379513043] [2020-10-13 05:15:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:15:33,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:33,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-13 05:15:33,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:34,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:34,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:15:34,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-13 05:15:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:34,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-13 05:15:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:34,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:34,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:34,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:34,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:34,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-10-13 05:15:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:34,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:34,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:34,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:34,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:34,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:34,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:15:34,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:34,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 6 proven. 2147 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:15:34,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379513043] [2020-10-13 05:15:34,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:34,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:15:34,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163332608] [2020-10-13 05:15:34,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:15:34,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:15:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:15:34,216 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 42 states. [2020-10-13 05:15:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:35,442 INFO L93 Difference]: Finished difference Result 382 states and 420 transitions. [2020-10-13 05:15:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:15:35,442 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 155 [2020-10-13 05:15:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:35,444 INFO L225 Difference]: With dead ends: 382 [2020-10-13 05:15:35,445 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 05:15:35,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:15:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 05:15:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 161. [2020-10-13 05:15:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 05:15:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-10-13 05:15:35,457 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 155 [2020-10-13 05:15:35,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:35,457 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-10-13 05:15:35,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:15:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-10-13 05:15:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 05:15:35,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:35,459 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:35,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:15:35,459 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash -760603535, now seen corresponding path program 5 times [2020-10-13 05:15:35,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:35,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230309836] [2020-10-13 05:15:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:42,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 05:15:42,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:42,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7214 [2020-10-13 05:15:42,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:15:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-13 05:15:42,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0