/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/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:04:45,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:04:45,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:04:45,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:04:45,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:04:45,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:04:45,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:04:45,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:04:45,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:04:45,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:04:45,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:04:45,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:04:45,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:04:45,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:04:45,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:04:45,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:04:45,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:04:45,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:04:45,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:04:45,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:04:45,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:04:45,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:04:45,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:04:45,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:04:45,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:04:45,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:04:45,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:04:45,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:04:45,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:04:45,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:04:45,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:04:45,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:04:45,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:04:45,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:04:45,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:04:45,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:04:45,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:04:45,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:04:45,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:04:45,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:04:45,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:04:45,730 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 15:04:45,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:04:45,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:04:45,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:04:45,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:04:45,781 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:04:45,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:04:45,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:04:45,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:04:45,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:04:45,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:04:45,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:04:45,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:04:45,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:04:45,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:04:45,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:04:45,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:04:45,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:04:45,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:04:45,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:04:45,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:04:45,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:04:45,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:04:45,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:04:45,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:04:45,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:04:45,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:04:45,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:04:45,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:04:45,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:04:45,788 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 15:04:46,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:04:46,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:04:46,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:04:46,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:04:46,146 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:04:46,147 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 15:04:46,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0101c1613/af7c52a7e19a44a4bcf0b5a73defe6f3/FLAG4ca55aa32 [2020-10-13 15:04:46,766 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:04:46,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 15:04:46,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0101c1613/af7c52a7e19a44a4bcf0b5a73defe6f3/FLAG4ca55aa32 [2020-10-13 15:04:47,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0101c1613/af7c52a7e19a44a4bcf0b5a73defe6f3 [2020-10-13 15:04:47,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:04:47,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:04:47,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:04:47,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:04:47,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:04:47,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:47,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4781f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47, skipping insertion in model container [2020-10-13 15:04:47,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:47,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:04:47,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:04:47,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:04:47,620 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:04:47,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:04:47,911 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:04:47,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47 WrapperNode [2020-10-13 15:04:47,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:04:47,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:04:47,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:04:47,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:04:47,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:47,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:47,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:47,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:48,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:48,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:48,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (1/1) ... [2020-10-13 15:04:48,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:04:48,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:04:48,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:04:48,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:04:48,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (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 15:04:48,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:04:48,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:04:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:04:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:04:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:04:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:04:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:04:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:04:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:04:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:04:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:04:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:04:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:04:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:04:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:04:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:04:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:04:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:04:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:04:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:04:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:04:49,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:04:49,601 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:04:49,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:04:49 BoogieIcfgContainer [2020-10-13 15:04:49,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:04:49,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:04:49,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:04:49,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:04:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:04:47" (1/3) ... [2020-10-13 15:04:49,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e0b589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:04:49, skipping insertion in model container [2020-10-13 15:04:49,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:04:47" (2/3) ... [2020-10-13 15:04:49,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e0b589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:04:49, skipping insertion in model container [2020-10-13 15:04:49,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:04:49" (3/3) ... [2020-10-13 15:04:49,616 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 15:04:49,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:04:49,634 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:04:49,648 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:04:49,675 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:04:49,675 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:04:49,675 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:04:49,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:04:49,676 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:04:49,676 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:04:49,676 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:04:49,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:04:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states. [2020-10-13 15:04:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 15:04:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:04:49,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:04:49,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:04:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:04:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1511443852, now seen corresponding path program 1 times [2020-10-13 15:04:49,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:04:49,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023813474] [2020-10-13 15:04:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:04:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:04:50,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:50,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:51,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:51,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:51,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:55,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:04:55,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 15:04:55,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:04:55,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-13 15:04:55,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:04:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:04:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 15:04:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 15:04:55,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:04:56,030 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:04:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:04:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:04:56,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:56,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:04:56,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:04:56,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:04:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 15:04:56,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:04:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:04:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:04:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:04:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 15:04:56,250 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 15:04:56,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023813474] [2020-10-13 15:04:56,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:04:56,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:04:56,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271325318] [2020-10-13 15:04:56,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:04:56,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:04:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:04:56,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:04:56,290 INFO L87 Difference]: Start difference. First operand 347 states. Second operand 7 states. [2020-10-13 15:04:56,893 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2020-10-13 15:04:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:04:59,461 INFO L93 Difference]: Finished difference Result 1547 states and 2632 transitions. [2020-10-13 15:04:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:04:59,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-13 15:04:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:04:59,492 INFO L225 Difference]: With dead ends: 1547 [2020-10-13 15:04:59,493 INFO L226 Difference]: Without dead ends: 1365 [2020-10-13 15:04:59,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:04:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2020-10-13 15:04:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 487. [2020-10-13 15:04:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-13 15:04:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 808 transitions. [2020-10-13 15:04:59,600 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 808 transitions. Word has length 122 [2020-10-13 15:04:59,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:04:59,601 INFO L479 AbstractCegarLoop]: Abstraction has 487 states and 808 transitions. [2020-10-13 15:04:59,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:04:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 808 transitions. [2020-10-13 15:04:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 15:04:59,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:04:59,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:04:59,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:04:59,607 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:04:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:04:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash -456049120, now seen corresponding path program 1 times [2020-10-13 15:04:59,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:04:59,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228116183] [2020-10-13 15:04:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:04:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:04:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:04:59,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:00,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:00,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:00,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 15:05:04,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:04,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:05:04,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 15:05:04,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 15:05:04,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:05:05,216 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:05:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:05:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:05:05,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:05:05,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 15:05:05,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:05:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:05:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:05:05,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:05,290 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 15:05:05,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228116183] [2020-10-13 15:05:05,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:05:05,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 15:05:05,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976413256] [2020-10-13 15:05:05,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:05:05,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:05:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:05:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:05:05,294 INFO L87 Difference]: Start difference. First operand 487 states and 808 transitions. Second operand 8 states. [2020-10-13 15:05:05,730 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 272 [2020-10-13 15:05:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:05:09,017 INFO L93 Difference]: Finished difference Result 3563 states and 5985 transitions. [2020-10-13 15:05:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 15:05:09,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-10-13 15:05:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:05:09,168 INFO L225 Difference]: With dead ends: 3563 [2020-10-13 15:05:09,168 INFO L226 Difference]: Without dead ends: 3273 [2020-10-13 15:05:09,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-10-13 15:05:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-10-13 15:05:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 1276. [2020-10-13 15:05:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-10-13 15:05:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 2137 transitions. [2020-10-13 15:05:09,369 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 2137 transitions. Word has length 123 [2020-10-13 15:05:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:05:09,371 INFO L479 AbstractCegarLoop]: Abstraction has 1276 states and 2137 transitions. [2020-10-13 15:05:09,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:05:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 2137 transitions. [2020-10-13 15:05:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 15:05:09,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:05:09,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:05:09,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:05:09,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:05:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:05:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1314231085, now seen corresponding path program 1 times [2020-10-13 15:05:09,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:05:09,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365533461] [2020-10-13 15:05:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:05:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:09,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:10,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:14,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:14,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 15:05:14,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:05:14,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 15:05:14,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:05:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 15:05:14,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:05:14,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:05:15,077 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:05:15,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:05:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:15,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:15,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:15,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:05:15,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:05:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 15:05:15,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:15,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:05:15,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:05:15,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:05:15,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:05:15,175 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 15:05:15,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365533461] [2020-10-13 15:05:15,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:05:15,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:05:15,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044022168] [2020-10-13 15:05:15,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:05:15,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:05:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:05:15,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:05:15,183 INFO L87 Difference]: Start difference. First operand 1276 states and 2137 transitions. Second operand 5 states. [2020-10-13 15:05:15,781 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:05:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:05:17,858 INFO L93 Difference]: Finished difference Result 4239 states and 7132 transitions. [2020-10-13 15:05:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:05:17,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-13 15:05:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:05:17,882 INFO L225 Difference]: With dead ends: 4239 [2020-10-13 15:05:17,882 INFO L226 Difference]: Without dead ends: 3266 [2020-10-13 15:05:17,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:05:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2020-10-13 15:05:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 2284. [2020-10-13 15:05:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2020-10-13 15:05:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3833 transitions. [2020-10-13 15:05:18,068 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3833 transitions. Word has length 124 [2020-10-13 15:05:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:05:18,069 INFO L479 AbstractCegarLoop]: Abstraction has 2284 states and 3833 transitions. [2020-10-13 15:05:18,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:05:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3833 transitions. [2020-10-13 15:05:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 15:05:18,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:05:18,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:05:18,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:05:18,073 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:05:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:05:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2143510201, now seen corresponding path program 1 times [2020-10-13 15:05:18,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:05:18,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254375404] [2020-10-13 15:05:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:05:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:18,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:18,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:18,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:19,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:23,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:23,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 15:05:23,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:05:23,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:05:23,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:23,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:05:23,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-13 15:05:23,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:05:23,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:23,596 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:05:23,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:05:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:23,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:23,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:05:23,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:05:23,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 15:05:23,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:23,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:05:23,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:05:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:05:23,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:23,656 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 15:05:23,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254375404] [2020-10-13 15:05:23,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:05:23,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:05:23,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065317265] [2020-10-13 15:05:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:05:23,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:05:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:05:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:05:23,661 INFO L87 Difference]: Start difference. First operand 2284 states and 3833 transitions. Second operand 5 states. [2020-10-13 15:05:24,113 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:05:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:05:26,006 INFO L93 Difference]: Finished difference Result 8119 states and 13658 transitions. [2020-10-13 15:05:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:05:26,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-13 15:05:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:05:26,039 INFO L225 Difference]: With dead ends: 8119 [2020-10-13 15:05:26,039 INFO L226 Difference]: Without dead ends: 6182 [2020-10-13 15:05:26,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:05:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6182 states. [2020-10-13 15:05:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6182 to 4229. [2020-10-13 15:05:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4229 states. [2020-10-13 15:05:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 7099 transitions. [2020-10-13 15:05:26,338 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 7099 transitions. Word has length 125 [2020-10-13 15:05:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:05:26,340 INFO L479 AbstractCegarLoop]: Abstraction has 4229 states and 7099 transitions. [2020-10-13 15:05:26,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:05:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 7099 transitions. [2020-10-13 15:05:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:05:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:05:26,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:05:26,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:05:26,344 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:05:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:05:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2076800998, now seen corresponding path program 1 times [2020-10-13 15:05:26,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:05:26,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103118606] [2020-10-13 15:05:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:05:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:27,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:31,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:31,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:05:31,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:05:31,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:05:31,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:05:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 15:05:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:05:31,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:31,844 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:05:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:05:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:31,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:31,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:31,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:05:31,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:05:31,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:05:31,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:05:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:05:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:05:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:31,899 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 15:05:31,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103118606] [2020-10-13 15:05:31,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:05:31,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:05:31,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616921064] [2020-10-13 15:05:31,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:05:31,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:05:31,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:05:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:05:31,902 INFO L87 Difference]: Start difference. First operand 4229 states and 7099 transitions. Second operand 5 states. [2020-10-13 15:05:32,304 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:05:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:05:34,292 INFO L93 Difference]: Finished difference Result 15803 states and 26554 transitions. [2020-10-13 15:05:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:05:34,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-13 15:05:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:05:34,351 INFO L225 Difference]: With dead ends: 15803 [2020-10-13 15:05:34,352 INFO L226 Difference]: Without dead ends: 11945 [2020-10-13 15:05:34,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:05:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11945 states. [2020-10-13 15:05:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11945 to 8057. [2020-10-13 15:05:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8057 states. [2020-10-13 15:05:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8057 states to 8057 states and 13511 transitions. [2020-10-13 15:05:35,070 INFO L78 Accepts]: Start accepts. Automaton has 8057 states and 13511 transitions. Word has length 126 [2020-10-13 15:05:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:05:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 8057 states and 13511 transitions. [2020-10-13 15:05:35,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:05:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 8057 states and 13511 transitions. [2020-10-13 15:05:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 15:05:35,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:05:35,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:05:35,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:05:35,076 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:05:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:05:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1186186821, now seen corresponding path program 1 times [2020-10-13 15:05:35,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:05:35,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209287151] [2020-10-13 15:05:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:05:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:35,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:35,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:40,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:40,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 15:05:40,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:05:40,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 15:05:40,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:05:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 15:05:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:05:40,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:40,499 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:05:40,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:05:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:40,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:40,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:40,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:05:40,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:05:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:05:40,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:05:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:05:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:05:40,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:40,556 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 15:05:40,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209287151] [2020-10-13 15:05:40,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:05:40,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:05:40,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484770543] [2020-10-13 15:05:40,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:05:40,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:05:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:05:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:05:40,559 INFO L87 Difference]: Start difference. First operand 8057 states and 13511 transitions. Second operand 4 states. [2020-10-13 15:05:41,046 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:05:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:05:43,972 INFO L93 Difference]: Finished difference Result 21916 states and 36742 transitions. [2020-10-13 15:05:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:05:43,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-10-13 15:05:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:05:44,008 INFO L225 Difference]: With dead ends: 21916 [2020-10-13 15:05:44,008 INFO L226 Difference]: Without dead ends: 14078 [2020-10-13 15:05:44,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:05:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14078 states. [2020-10-13 15:05:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14078 to 14076. [2020-10-13 15:05:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14076 states. [2020-10-13 15:05:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14076 states to 14076 states and 23526 transitions. [2020-10-13 15:05:44,962 INFO L78 Accepts]: Start accepts. Automaton has 14076 states and 23526 transitions. Word has length 127 [2020-10-13 15:05:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:05:44,962 INFO L479 AbstractCegarLoop]: Abstraction has 14076 states and 23526 transitions. [2020-10-13 15:05:44,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:05:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 14076 states and 23526 transitions. [2020-10-13 15:05:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 15:05:44,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:05:44,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:05:44,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:05:44,965 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:05:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:05:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1459635083, now seen corresponding path program 1 times [2020-10-13 15:05:44,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:05:44,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385881340] [2020-10-13 15:05:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:05:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:45,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:45,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:45,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:50,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 15:05:50,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:50,414 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:05:50,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:05:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:50,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:50,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:05:50,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:05:50,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:05:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:05:50,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:05:50,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:05:50,465 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 15:05:50,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385881340] [2020-10-13 15:05:50,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:05:50,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:05:50,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104729224] [2020-10-13 15:05:50,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:05:50,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:05:50,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:05:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:05:50,468 INFO L87 Difference]: Start difference. First operand 14076 states and 23526 transitions. Second operand 4 states. [2020-10-13 15:05:50,877 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:05:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:05:53,795 INFO L93 Difference]: Finished difference Result 38222 states and 63824 transitions. [2020-10-13 15:05:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:05:53,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-10-13 15:05:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:05:53,855 INFO L225 Difference]: With dead ends: 38222 [2020-10-13 15:05:53,855 INFO L226 Difference]: Without dead ends: 24442 [2020-10-13 15:05:53,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:05:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24442 states. [2020-10-13 15:05:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24442 to 24440. [2020-10-13 15:05:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24440 states. [2020-10-13 15:05:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24440 states to 24440 states and 40662 transitions. [2020-10-13 15:05:55,014 INFO L78 Accepts]: Start accepts. Automaton has 24440 states and 40662 transitions. Word has length 127 [2020-10-13 15:05:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:05:55,014 INFO L479 AbstractCegarLoop]: Abstraction has 24440 states and 40662 transitions. [2020-10-13 15:05:55,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:05:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24440 states and 40662 transitions. [2020-10-13 15:05:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 15:05:55,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:05:55,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:05:55,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:05:55,017 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:05:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:05:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1319939168, now seen corresponding path program 1 times [2020-10-13 15:05:55,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:05:55,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857480573] [2020-10-13 15:05:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:05:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:05:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:55,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:55,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:55,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:55,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:56,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:05:56,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:00,458 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:06:00,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:06:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:00,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:00,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:06:00,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:06:00,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:06:00,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:00,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:06:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:06:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:06:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:00,500 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 15:06:00,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857480573] [2020-10-13 15:06:00,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:06:00,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:06:00,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743226919] [2020-10-13 15:06:00,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:06:00,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:06:00,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:06:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:06:00,503 INFO L87 Difference]: Start difference. First operand 24440 states and 40662 transitions. Second operand 4 states. [2020-10-13 15:06:00,911 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:06:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:06:04,453 INFO L93 Difference]: Finished difference Result 66076 states and 109752 transitions. [2020-10-13 15:06:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:06:04,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-10-13 15:06:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:06:04,556 INFO L225 Difference]: With dead ends: 66076 [2020-10-13 15:06:04,556 INFO L226 Difference]: Without dead ends: 41936 [2020-10-13 15:06:04,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:06:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41936 states. [2020-10-13 15:06:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41936 to 41864. [2020-10-13 15:06:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41864 states. [2020-10-13 15:06:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41864 states to 41864 states and 69237 transitions. [2020-10-13 15:06:06,691 INFO L78 Accepts]: Start accepts. Automaton has 41864 states and 69237 transitions. Word has length 127 [2020-10-13 15:06:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:06:06,692 INFO L479 AbstractCegarLoop]: Abstraction has 41864 states and 69237 transitions. [2020-10-13 15:06:06,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:06:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 41864 states and 69237 transitions. [2020-10-13 15:06:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 15:06:06,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:06:06,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:06:06,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:06:06,694 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:06:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:06:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2081790590, now seen corresponding path program 1 times [2020-10-13 15:06:06,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:06:06,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629228899] [2020-10-13 15:06:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:06:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:06,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:06,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:07,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:07,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:10,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:10,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:11,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:06:11,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:12,131 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:06:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:06:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:12,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:06:12,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:06:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:06:12,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:12,168 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 15:06:12,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629228899] [2020-10-13 15:06:12,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:06:12,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:06:12,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404226314] [2020-10-13 15:06:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:06:12,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:06:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:06:12,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:06:12,169 INFO L87 Difference]: Start difference. First operand 41864 states and 69237 transitions. Second operand 4 states. [2020-10-13 15:06:12,563 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:06:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:06:17,633 INFO L93 Difference]: Finished difference Result 111916 states and 184567 transitions. [2020-10-13 15:06:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:06:17,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-10-13 15:06:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:06:17,762 INFO L225 Difference]: With dead ends: 111916 [2020-10-13 15:06:17,763 INFO L226 Difference]: Without dead ends: 70273 [2020-10-13 15:06:17,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:06:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70273 states. [2020-10-13 15:06:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70273 to 70247. [2020-10-13 15:06:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70247 states. [2020-10-13 15:06:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70247 states to 70247 states and 115198 transitions. [2020-10-13 15:06:22,717 INFO L78 Accepts]: Start accepts. Automaton has 70247 states and 115198 transitions. Word has length 127 [2020-10-13 15:06:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:06:22,717 INFO L479 AbstractCegarLoop]: Abstraction has 70247 states and 115198 transitions. [2020-10-13 15:06:22,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:06:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 70247 states and 115198 transitions. [2020-10-13 15:06:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 15:06:22,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:06:22,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:06:22,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:06:22,720 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:06:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:06:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash -135595318, now seen corresponding path program 1 times [2020-10-13 15:06:22,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:06:22,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672611767] [2020-10-13 15:06:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:06:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:22,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:22,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:22,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:23,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:25,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:25,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 15:06:25,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:06:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2653 [2020-10-13 15:06:25,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:25,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:06:25,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 15:06:25,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 15:06:25,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:25,992 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:06:25,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:06:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:26,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:26,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:06:26,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:26,029 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 15:06:26,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672611767] [2020-10-13 15:06:26,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:06:26,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:06:26,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539841178] [2020-10-13 15:06:26,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:06:26,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:06:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:06:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:06:26,031 INFO L87 Difference]: Start difference. First operand 70247 states and 115198 transitions. Second operand 4 states. [2020-10-13 15:06:26,414 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-13 15:06:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:06:31,915 INFO L93 Difference]: Finished difference Result 159881 states and 262082 transitions. [2020-10-13 15:06:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:06:31,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-13 15:06:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:06:32,112 INFO L225 Difference]: With dead ends: 159881 [2020-10-13 15:06:32,113 INFO L226 Difference]: Without dead ends: 89831 [2020-10-13 15:06:32,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:06:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89831 states. [2020-10-13 15:06:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89831 to 89829. [2020-10-13 15:06:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89829 states. [2020-10-13 15:06:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89829 states to 89829 states and 146376 transitions. [2020-10-13 15:06:37,039 INFO L78 Accepts]: Start accepts. Automaton has 89829 states and 146376 transitions. Word has length 128 [2020-10-13 15:06:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:06:37,040 INFO L479 AbstractCegarLoop]: Abstraction has 89829 states and 146376 transitions. [2020-10-13 15:06:37,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:06:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 89829 states and 146376 transitions. [2020-10-13 15:06:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 15:06:37,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:06:37,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:06:37,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:06:37,046 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:06:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:06:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2032425369, now seen corresponding path program 1 times [2020-10-13 15:06:37,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:06:37,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201557546] [2020-10-13 15:06:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:06:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:37,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:37,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:37,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:42,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:42,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 15:06:42,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:06:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 15:06:42,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:06:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 15:06:42,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 15:06:42,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:42,609 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:06:42,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:06:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:06:42,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:06:42,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:06:42,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:06:42,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:06:42,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:06:42,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:06:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:06:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:06:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:06:42,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:06:42,673 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 15:06:42,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201557546] [2020-10-13 15:06:42,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:06:42,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:06:42,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710917368] [2020-10-13 15:06:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:06:42,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:06:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:06:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:06:42,675 INFO L87 Difference]: Start difference. First operand 89829 states and 146376 transitions. Second operand 7 states. [2020-10-13 15:06:43,186 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2020-10-13 15:06:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:06:56,508 INFO L93 Difference]: Finished difference Result 302069 states and 493232 transitions. [2020-10-13 15:06:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:06:56,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-13 15:06:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:06:56,823 INFO L225 Difference]: With dead ends: 302069 [2020-10-13 15:06:56,823 INFO L226 Difference]: Without dead ends: 212439 [2020-10-13 15:06:56,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:06:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212439 states. [2020-10-13 15:07:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212439 to 89829. [2020-10-13 15:07:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89829 states. [2020-10-13 15:07:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89829 states to 89829 states and 146000 transitions. [2020-10-13 15:07:02,636 INFO L78 Accepts]: Start accepts. Automaton has 89829 states and 146000 transitions. Word has length 131 [2020-10-13 15:07:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:07:02,637 INFO L479 AbstractCegarLoop]: Abstraction has 89829 states and 146000 transitions. [2020-10-13 15:07:02,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:07:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 89829 states and 146000 transitions. [2020-10-13 15:07:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 15:07:02,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:07:02,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:07:02,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:07:02,638 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:07:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:07:02,638 INFO L82 PathProgramCache]: Analyzing trace with hash -219101815, now seen corresponding path program 1 times [2020-10-13 15:07:02,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:07:02,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140366909] [2020-10-13 15:07:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:07:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:07:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:03,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:03,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:07,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:07,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:07:07,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 15:07:07,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:07:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 15:07:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:07:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:07:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-13 15:07:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 15:07:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:07:08,130 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:07:08,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:07:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:07:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:08,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:07:08,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:07:08,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:07:08,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:07:08,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:07:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:07:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:07:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:07:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:07:08,195 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 15:07:08,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140366909] [2020-10-13 15:07:08,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:07:08,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:07:08,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445950054] [2020-10-13 15:07:08,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:07:08,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:07:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:07:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:07:08,198 INFO L87 Difference]: Start difference. First operand 89829 states and 146000 transitions. Second operand 7 states. [2020-10-13 15:07:08,664 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2020-10-13 15:07:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:07:36,821 INFO L93 Difference]: Finished difference Result 503953 states and 821752 transitions. [2020-10-13 15:07:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:07:36,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 134 [2020-10-13 15:07:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:07:37,479 INFO L225 Difference]: With dead ends: 503953 [2020-10-13 15:07:37,480 INFO L226 Difference]: Without dead ends: 414323 [2020-10-13 15:07:37,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:07:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414323 states. [2020-10-13 15:07:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414323 to 169477. [2020-10-13 15:07:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169477 states. [2020-10-13 15:07:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169477 states to 169477 states and 274456 transitions. [2020-10-13 15:07:54,383 INFO L78 Accepts]: Start accepts. Automaton has 169477 states and 274456 transitions. Word has length 134 [2020-10-13 15:07:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:07:54,383 INFO L479 AbstractCegarLoop]: Abstraction has 169477 states and 274456 transitions. [2020-10-13 15:07:54,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:07:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 169477 states and 274456 transitions. [2020-10-13 15:07:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 15:07:54,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:07:54,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:07:54,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:07:54,385 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:07:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:07:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1795869238, now seen corresponding path program 1 times [2020-10-13 15:07:54,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:07:54,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464816880] [2020-10-13 15:07:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:07:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:07:54,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:54,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:54,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:54,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:55,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:59,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:07:59,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 15:07:59,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:07:59,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 15:07:59,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:07:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:07:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 15:07:59,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 15:07:59,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:07:59,844 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-13 15:07:59,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:07:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:07:59,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:59,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:07:59,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:07:59,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:07:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 15:07:59,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:07:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:07:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:07:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:07:59,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:07:59,898 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 15:07:59,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464816880] [2020-10-13 15:07:59,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:07:59,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:07:59,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852286316] [2020-10-13 15:07:59,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:07:59,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:07:59,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:07:59,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:07:59,900 INFO L87 Difference]: Start difference. First operand 169477 states and 274456 transitions. Second operand 4 states. [2020-10-13 15:08:00,296 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-13 15:08:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:20,757 INFO L93 Difference]: Finished difference Result 382639 states and 619524 transitions. [2020-10-13 15:08:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:08:20,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-13 15:08:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:21,089 INFO L225 Difference]: With dead ends: 382639 [2020-10-13 15:08:21,089 INFO L226 Difference]: Without dead ends: 213361 [2020-10-13 15:08:21,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:08:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213361 states.