/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.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:59:48,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:59:48,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:59:48,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:59:48,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:59:48,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:59:48,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:59:48,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:59:48,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:59:48,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:59:48,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:59:48,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:59:48,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:59:48,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:59:48,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:59:48,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:59:48,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:59:48,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:59:48,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:59:48,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:59:48,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:59:48,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:59:48,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:59:48,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:59:48,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:59:48,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:59:48,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:59:48,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:59:48,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:59:48,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:59:48,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:59:48,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:59:48,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:59:48,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:59:48,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:59:48,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:59:48,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:59:48,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:59:48,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:59:48,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:59:48,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:59:48,696 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 14:59:48,738 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:59:48,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:59:48,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:59:48,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:59:48,740 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:59:48,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:59:48,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:59:48,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:59:48,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:59:48,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:59:48,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:59:48,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:59:48,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:59:48,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:59:48,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:59:48,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:59:48,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:59:48,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:59:48,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:59:48,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:59:48,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:59:48,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:59:48,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:59:48,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:59:48,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:59:48,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:59:48,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:59:48,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:59:48,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:59:48,745 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 14:59:49,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:59:49,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:59:49,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:59:49,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:59:49,114 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:59:49,115 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:59:49,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54c23654/d17c2a0b729642a58b4b519aa3711adb/FLAG9b9040229 [2020-10-13 14:59:49,707 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:59:49,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:59:49,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54c23654/d17c2a0b729642a58b4b519aa3711adb/FLAG9b9040229 [2020-10-13 14:59:50,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54c23654/d17c2a0b729642a58b4b519aa3711adb [2020-10-13 14:59:50,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:59:50,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:59:50,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:59:50,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:59:50,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:59:50,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5273b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50, skipping insertion in model container [2020-10-13 14:59:50,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:59:50,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:59:50,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:59:50,588 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:59:50,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:59:50,719 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:59:50,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50 WrapperNode [2020-10-13 14:59:50,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:59:50,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:59:50,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:59:50,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:59:50,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (1/1) ... [2020-10-13 14:59:50,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:59:50,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:59:50,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:59:50,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:59:50,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (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 14:59:50,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:59:50,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:59:50,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:59:50,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:59:50,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:59:50,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:59:50,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:59:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:59:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:59:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:59:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:59:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:59:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:59:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:59:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:59:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:59:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:59:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:59:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:59:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:59:51,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:59:51,679 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:59:51,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:59:51 BoogieIcfgContainer [2020-10-13 14:59:51,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:59:51,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:59:51,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:59:51,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:59:51,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:59:50" (1/3) ... [2020-10-13 14:59:51,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a62a1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:59:51, skipping insertion in model container [2020-10-13 14:59:51,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:50" (2/3) ... [2020-10-13 14:59:51,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a62a1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:59:51, skipping insertion in model container [2020-10-13 14:59:51,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:59:51" (3/3) ... [2020-10-13 14:59:51,694 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:59:51,706 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:59:51,715 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:59:51,730 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:59:51,759 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:59:51,759 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:59:51,759 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:59:51,759 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:59:51,760 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:59:51,760 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:59:51,760 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:59:51,760 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:59:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-13 14:59:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:59:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:51,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:51,801 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-13 14:59:51,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:51,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281401953] [2020-10-13 14:59:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:52,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:54,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:54,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:59:54,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:59:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1984 [2020-10-13 14:59:54,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:54,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:59:54,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:59:54,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:59:54,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:59:54,470 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:54,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:54,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:59:54,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:59:54,523 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 14:59:54,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281401953] [2020-10-13 14:59:54,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:54,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:59:54,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272256061] [2020-10-13 14:59:54,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:59:54,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:54,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:59:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:54,552 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-13 14:59:54,941 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:59:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:55,919 INFO L93 Difference]: Finished difference Result 712 states and 1188 transitions. [2020-10-13 14:59:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:59:55,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:59:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:55,942 INFO L225 Difference]: With dead ends: 712 [2020-10-13 14:59:55,942 INFO L226 Difference]: Without dead ends: 595 [2020-10-13 14:59:55,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:59:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-13 14:59:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 237. [2020-10-13 14:59:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 14:59:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 374 transitions. [2020-10-13 14:59:56,027 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 374 transitions. Word has length 66 [2020-10-13 14:59:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:56,028 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 374 transitions. [2020-10-13 14:59:56,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:59:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 374 transitions. [2020-10-13 14:59:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:59:56,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:56,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:56,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:59:56,032 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1268134624, now seen corresponding path program 1 times [2020-10-13 14:59:56,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:56,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010300539] [2020-10-13 14:59:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:58,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:58,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:59:58,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:59:58,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2675 [2020-10-13 14:59:58,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:59:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:59:58,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:59:58,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:59,132 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:59,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:59,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:59,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:59:59,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:59,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:59,185 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 14:59:59,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010300539] [2020-10-13 14:59:59,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:59,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:59:59,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561949488] [2020-10-13 14:59:59,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:59:59,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:59:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:59:59,190 INFO L87 Difference]: Start difference. First operand 237 states and 374 transitions. Second operand 7 states. [2020-10-13 14:59:59,508 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 15:00:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:00,687 INFO L93 Difference]: Finished difference Result 1483 states and 2442 transitions. [2020-10-13 15:00:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 15:00:00,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 15:00:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:00,697 INFO L225 Difference]: With dead ends: 1483 [2020-10-13 15:00:00,697 INFO L226 Difference]: Without dead ends: 1307 [2020-10-13 15:00:00,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 15:00:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-13 15:00:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 694. [2020-10-13 15:00:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-13 15:00:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1133 transitions. [2020-10-13 15:00:00,793 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1133 transitions. Word has length 67 [2020-10-13 15:00:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:00,795 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1133 transitions. [2020-10-13 15:00:00,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:00:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1133 transitions. [2020-10-13 15:00:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 15:00:00,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:00,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:00,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:00:00,808 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:00,808 INFO L82 PathProgramCache]: Analyzing trace with hash -714520107, now seen corresponding path program 1 times [2020-10-13 15:00:00,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:00,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222119321] [2020-10-13 15:00:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:01,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:02,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:02,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 15:00:02,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:00:02,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2058 [2020-10-13 15:00:02,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 15:00:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:00:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:03,176 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:03,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:03,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:03,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:00:03,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:03,213 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 15:00:03,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222119321] [2020-10-13 15:00:03,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:03,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:03,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859376881] [2020-10-13 15:00:03,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:03,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:03,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:03,216 INFO L87 Difference]: Start difference. First operand 694 states and 1133 transitions. Second operand 5 states. [2020-10-13 15:00:03,422 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 15:00:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:04,215 INFO L93 Difference]: Finished difference Result 2435 states and 4030 transitions. [2020-10-13 15:00:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:00:04,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 15:00:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:04,228 INFO L225 Difference]: With dead ends: 2435 [2020-10-13 15:00:04,228 INFO L226 Difference]: Without dead ends: 1858 [2020-10-13 15:00:04,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:00:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2020-10-13 15:00:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1272. [2020-10-13 15:00:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 15:00:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 2091 transitions. [2020-10-13 15:00:04,341 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 2091 transitions. Word has length 68 [2020-10-13 15:00:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:04,341 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 2091 transitions. [2020-10-13 15:00:04,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 2091 transitions. [2020-10-13 15:00:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 15:00:04,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:04,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:04,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:00:04,348 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash -727781241, now seen corresponding path program 1 times [2020-10-13 15:00:04,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:04,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572524842] [2020-10-13 15:00:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:06,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 15:00:06,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:00:06,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2333 [2020-10-13 15:00:06,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 15:00:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:00:06,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:06,954 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:06,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:06,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:06,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:06,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:00:06,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:06,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:06,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:06,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:07,004 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 15:00:07,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572524842] [2020-10-13 15:00:07,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:07,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:07,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661290922] [2020-10-13 15:00:07,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:07,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:07,008 INFO L87 Difference]: Start difference. First operand 1272 states and 2091 transitions. Second operand 5 states. [2020-10-13 15:00:07,212 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 15:00:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:08,049 INFO L93 Difference]: Finished difference Result 4707 states and 7794 transitions. [2020-10-13 15:00:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:00:08,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 15:00:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:08,069 INFO L225 Difference]: With dead ends: 4707 [2020-10-13 15:00:08,070 INFO L226 Difference]: Without dead ends: 3562 [2020-10-13 15:00:08,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:00:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2020-10-13 15:00:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 2401. [2020-10-13 15:00:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2401 states. [2020-10-13 15:00:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3955 transitions. [2020-10-13 15:00:08,242 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3955 transitions. Word has length 69 [2020-10-13 15:00:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:08,243 INFO L479 AbstractCegarLoop]: Abstraction has 2401 states and 3955 transitions. [2020-10-13 15:00:08,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3955 transitions. [2020-10-13 15:00:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 15:00:08,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:08,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:08,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:00:08,245 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:08,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2053684873, now seen corresponding path program 1 times [2020-10-13 15:00:08,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:08,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586071390] [2020-10-13 15:00:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:08,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:08,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:08,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:13,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 15:00:13,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:00:13,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 15:00:13,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 15:00:13,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:00:13,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 15:00:13,514 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:13,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:13,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:13,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:13,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 15:00:13,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:13,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:13,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:13,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:13,573 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 15:00:13,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586071390] [2020-10-13 15:00:13,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:13,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:13,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442878400] [2020-10-13 15:00:13,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:13,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:13,576 INFO L87 Difference]: Start difference. First operand 2401 states and 3955 transitions. Second operand 4 states. [2020-10-13 15:00:13,800 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 15:00:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:14,843 INFO L93 Difference]: Finished difference Result 6388 states and 10546 transitions. [2020-10-13 15:00:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:14,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 15:00:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:14,866 INFO L225 Difference]: With dead ends: 6388 [2020-10-13 15:00:14,866 INFO L226 Difference]: Without dead ends: 4064 [2020-10-13 15:00:14,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2020-10-13 15:00:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4062. [2020-10-13 15:00:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4062 states. [2020-10-13 15:00:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6666 transitions. [2020-10-13 15:00:15,132 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6666 transitions. Word has length 70 [2020-10-13 15:00:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:15,134 INFO L479 AbstractCegarLoop]: Abstraction has 4062 states and 6666 transitions. [2020-10-13 15:00:15,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6666 transitions. [2020-10-13 15:00:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 15:00:15,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:15,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:15,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:00:15,136 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -990936345, now seen corresponding path program 1 times [2020-10-13 15:00:15,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:15,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896668602] [2020-10-13 15:00:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:15,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:15,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:15,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:20,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:20,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 15:00:20,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:00:20,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:00:20,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:20,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:20,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 15:00:20,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 15:00:20,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:20,420 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:20,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:20,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:20,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:20,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:20,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:00:20,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:20,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:20,462 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 15:00:20,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896668602] [2020-10-13 15:00:20,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:20,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:20,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926550181] [2020-10-13 15:00:20,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:20,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:20,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:20,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:20,465 INFO L87 Difference]: Start difference. First operand 4062 states and 6666 transitions. Second operand 4 states. [2020-10-13 15:00:20,741 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 15:00:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:21,861 INFO L93 Difference]: Finished difference Result 10751 states and 17644 transitions. [2020-10-13 15:00:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:21,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 15:00:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:21,898 INFO L225 Difference]: With dead ends: 10751 [2020-10-13 15:00:21,898 INFO L226 Difference]: Without dead ends: 6782 [2020-10-13 15:00:21,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6782 states. [2020-10-13 15:00:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6782 to 6780. [2020-10-13 15:00:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6780 states. [2020-10-13 15:00:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6780 states to 6780 states and 11050 transitions. [2020-10-13 15:00:22,292 INFO L78 Accepts]: Start accepts. Automaton has 6780 states and 11050 transitions. Word has length 70 [2020-10-13 15:00:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:22,293 INFO L479 AbstractCegarLoop]: Abstraction has 6780 states and 11050 transitions. [2020-10-13 15:00:22,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6780 states and 11050 transitions. [2020-10-13 15:00:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 15:00:22,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:22,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:22,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:00:22,294 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1998371771, now seen corresponding path program 1 times [2020-10-13 15:00:22,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:22,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200747553] [2020-10-13 15:00:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:27,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:27,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 15:00:27,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:00:27,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:00:27,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 15:00:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 15:00:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:27,557 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:27,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:27,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:27,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:27,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:27,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:00:27,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:27,596 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 15:00:27,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200747553] [2020-10-13 15:00:27,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:27,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:27,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469382060] [2020-10-13 15:00:27,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:27,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:27,598 INFO L87 Difference]: Start difference. First operand 6780 states and 11050 transitions. Second operand 4 states. [2020-10-13 15:00:27,808 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 15:00:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:28,937 INFO L93 Difference]: Finished difference Result 17728 states and 28828 transitions. [2020-10-13 15:00:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:28,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 15:00:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:28,989 INFO L225 Difference]: With dead ends: 17728 [2020-10-13 15:00:28,989 INFO L226 Difference]: Without dead ends: 11043 [2020-10-13 15:00:29,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-10-13 15:00:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 11007. [2020-10-13 15:00:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11007 states. [2020-10-13 15:00:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 17744 transitions. [2020-10-13 15:00:29,624 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 17744 transitions. Word has length 70 [2020-10-13 15:00:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:29,624 INFO L479 AbstractCegarLoop]: Abstraction has 11007 states and 17744 transitions. [2020-10-13 15:00:29,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 17744 transitions. [2020-10-13 15:00:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 15:00:29,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:29,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:29,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:00:29,626 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash -807738537, now seen corresponding path program 1 times [2020-10-13 15:00:29,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:29,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402597370] [2020-10-13 15:00:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:30,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:30,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 15:00:30,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:00:30,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-13 15:00:30,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:30,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:30,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 15:00:30,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:00:30,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:30,648 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:30,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:30,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:30,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:30,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:30,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:30,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:00:30,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:30,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:30,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:30,677 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 15:00:30,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402597370] [2020-10-13 15:00:30,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:30,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:30,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064848509] [2020-10-13 15:00:30,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:30,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:30,680 INFO L87 Difference]: Start difference. First operand 11007 states and 17744 transitions. Second operand 4 states. [2020-10-13 15:00:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:31,917 INFO L93 Difference]: Finished difference Result 27971 states and 44706 transitions. [2020-10-13 15:00:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:31,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 15:00:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:31,968 INFO L225 Difference]: With dead ends: 27971 [2020-10-13 15:00:31,969 INFO L226 Difference]: Without dead ends: 17025 [2020-10-13 15:00:31,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17025 states. [2020-10-13 15:00:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17025 to 17023. [2020-10-13 15:00:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17023 states. [2020-10-13 15:00:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17023 states to 17023 states and 26560 transitions. [2020-10-13 15:00:32,758 INFO L78 Accepts]: Start accepts. Automaton has 17023 states and 26560 transitions. Word has length 71 [2020-10-13 15:00:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:32,759 INFO L479 AbstractCegarLoop]: Abstraction has 17023 states and 26560 transitions. [2020-10-13 15:00:32,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 17023 states and 26560 transitions. [2020-10-13 15:00:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 15:00:32,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:32,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:32,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:00:32,760 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash -511424921, now seen corresponding path program 1 times [2020-10-13 15:00:32,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:32,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805616453] [2020-10-13 15:00:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:32,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:33,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 15:00:33,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:00:33,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-13 15:00:33,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:33,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:33,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 15:00:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:00:33,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:33,394 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:33,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:33,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:33,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:00:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:33,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:33,422 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 15:00:33,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805616453] [2020-10-13 15:00:33,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:33,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:33,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807740216] [2020-10-13 15:00:33,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:33,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:33,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:33,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:33,424 INFO L87 Difference]: Start difference. First operand 17023 states and 26560 transitions. Second operand 4 states. [2020-10-13 15:00:33,771 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 15:00:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:34,859 INFO L93 Difference]: Finished difference Result 36733 states and 57476 transitions. [2020-10-13 15:00:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:34,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 15:00:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:34,913 INFO L225 Difference]: With dead ends: 36733 [2020-10-13 15:00:34,913 INFO L226 Difference]: Without dead ends: 19771 [2020-10-13 15:00:34,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19771 states. [2020-10-13 15:00:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19771 to 19769. [2020-10-13 15:00:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19769 states. [2020-10-13 15:00:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19769 states to 19769 states and 30806 transitions. [2020-10-13 15:00:36,549 INFO L78 Accepts]: Start accepts. Automaton has 19769 states and 30806 transitions. Word has length 72 [2020-10-13 15:00:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:36,549 INFO L479 AbstractCegarLoop]: Abstraction has 19769 states and 30806 transitions. [2020-10-13 15:00:36,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 19769 states and 30806 transitions. [2020-10-13 15:00:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 15:00:36,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:36,550 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] [2020-10-13 15:00:36,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:00:36,551 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash 903278326, now seen corresponding path program 1 times [2020-10-13 15:00:36,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:36,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089935354] [2020-10-13 15:00:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:36,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2502 [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 15:00:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 15:00:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:39,274 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:39,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:39,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:39,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:00:39,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:39,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:39,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:39,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:39,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:39,296 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 15:00:39,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089935354] [2020-10-13 15:00:39,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:39,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:39,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700848846] [2020-10-13 15:00:39,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:39,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:39,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:39,299 INFO L87 Difference]: Start difference. First operand 19769 states and 30806 transitions. Second operand 4 states. [2020-10-13 15:00:39,504 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 15:00:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:40,862 INFO L93 Difference]: Finished difference Result 44608 states and 69544 transitions. [2020-10-13 15:00:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:40,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 15:00:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:40,910 INFO L225 Difference]: With dead ends: 44608 [2020-10-13 15:00:40,911 INFO L226 Difference]: Without dead ends: 24902 [2020-10-13 15:00:40,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24902 states. [2020-10-13 15:00:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24902 to 24900. [2020-10-13 15:00:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24900 states. [2020-10-13 15:00:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 38712 transitions. [2020-10-13 15:00:41,973 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 38712 transitions. Word has length 73 [2020-10-13 15:00:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:41,973 INFO L479 AbstractCegarLoop]: Abstraction has 24900 states and 38712 transitions. [2020-10-13 15:00:41,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 38712 transitions. [2020-10-13 15:00:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 15:00:41,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:41,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:41,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:00:41,975 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:41,976 INFO L82 PathProgramCache]: Analyzing trace with hash 268409429, now seen corresponding path program 1 times [2020-10-13 15:00:41,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:41,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063072469] [2020-10-13 15:00:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:42,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:42,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:43,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:46,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 15:00:46,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:00:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4531 [2020-10-13 15:00:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:00:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 15:00:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:00:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:46,790 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:46,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:46,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:46,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:00:46,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:46,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:46,821 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 15:00:46,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063072469] [2020-10-13 15:00:46,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:46,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:00:46,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142897860] [2020-10-13 15:00:46,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:00:46,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:00:46,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:46,824 INFO L87 Difference]: Start difference. First operand 24900 states and 38712 transitions. Second operand 6 states. [2020-10-13 15:00:47,198 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 15:00:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:49,705 INFO L93 Difference]: Finished difference Result 71985 states and 112086 transitions. [2020-10-13 15:00:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:00:49,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-13 15:00:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:49,777 INFO L225 Difference]: With dead ends: 71985 [2020-10-13 15:00:49,777 INFO L226 Difference]: Without dead ends: 47164 [2020-10-13 15:00:49,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:00:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47164 states. [2020-10-13 15:00:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47164 to 24900. [2020-10-13 15:00:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24900 states. [2020-10-13 15:00:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 38598 transitions. [2020-10-13 15:00:51,023 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 38598 transitions. Word has length 75 [2020-10-13 15:00:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:51,023 INFO L479 AbstractCegarLoop]: Abstraction has 24900 states and 38598 transitions. [2020-10-13 15:00:51,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:00:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 38598 transitions. [2020-10-13 15:00:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 15:00:51,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:51,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:51,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:00:51,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1201667880, now seen corresponding path program 1 times [2020-10-13 15:00:51,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:51,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034121784] [2020-10-13 15:00:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:51,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:51,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:51,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:51,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:53,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:56,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 15:00:56,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:00:56,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:00:56,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:00:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 15:00:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:00:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:56,290 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:56,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:56,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:56,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:00:56,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:56,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:56,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:56,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:56,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:56,318 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 15:00:56,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034121784] [2020-10-13 15:00:56,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:56,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:00:56,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286330254] [2020-10-13 15:00:56,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:00:56,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:00:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:56,321 INFO L87 Difference]: Start difference. First operand 24900 states and 38598 transitions. Second operand 6 states. [2020-10-13 15:00:56,570 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 15:01:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:01,364 INFO L93 Difference]: Finished difference Result 112693 states and 175182 transitions. [2020-10-13 15:01:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:01:01,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 15:01:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:01,485 INFO L225 Difference]: With dead ends: 112693 [2020-10-13 15:01:01,485 INFO L226 Difference]: Without dead ends: 87872 [2020-10-13 15:01:01,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:01:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87872 states. [2020-10-13 15:01:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87872 to 46088. [2020-10-13 15:01:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46088 states. [2020-10-13 15:01:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46088 states to 46088 states and 71228 transitions. [2020-10-13 15:01:04,242 INFO L78 Accepts]: Start accepts. Automaton has 46088 states and 71228 transitions. Word has length 78 [2020-10-13 15:01:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:04,242 INFO L479 AbstractCegarLoop]: Abstraction has 46088 states and 71228 transitions. [2020-10-13 15:01:04,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:01:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 46088 states and 71228 transitions. [2020-10-13 15:01:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 15:01:04,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:04,245 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] [2020-10-13 15:01:04,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:01:04,245 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1404910670, now seen corresponding path program 1 times [2020-10-13 15:01:04,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:04,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370204385] [2020-10-13 15:01:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:04,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:05,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:08,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 15:01:08,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:01:08,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4157 [2020-10-13 15:01:08,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:08,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 15:01:08,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 15:01:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:08,634 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:01:08,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:08,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:08,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:08,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:01:08,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:08,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:08,657 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 15:01:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370204385] [2020-10-13 15:01:08,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:08,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:08,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669705019] [2020-10-13 15:01:08,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:08,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:08,659 INFO L87 Difference]: Start difference. First operand 46088 states and 71228 transitions. Second operand 5 states. [2020-10-13 15:01:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:13,098 INFO L93 Difference]: Finished difference Result 64043 states and 98063 transitions. [2020-10-13 15:01:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:01:13,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 15:01:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:13,187 INFO L225 Difference]: With dead ends: 64043 [2020-10-13 15:01:13,187 INFO L226 Difference]: Without dead ends: 64041 [2020-10-13 15:01:13,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64041 states. [2020-10-13 15:01:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64041 to 46496. [2020-10-13 15:01:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46496 states. [2020-10-13 15:01:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46496 states to 46496 states and 71606 transitions. [2020-10-13 15:01:15,723 INFO L78 Accepts]: Start accepts. Automaton has 46496 states and 71606 transitions. Word has length 79 [2020-10-13 15:01:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:15,723 INFO L479 AbstractCegarLoop]: Abstraction has 46496 states and 71606 transitions. [2020-10-13 15:01:15,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 46496 states and 71606 transitions. [2020-10-13 15:01:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 15:01:15,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:15,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:15,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:01:15,727 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1075390058, now seen corresponding path program 1 times [2020-10-13 15:01:15,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:15,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458610309] [2020-10-13 15:01:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:15,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:16,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:18,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:18,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:20,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:01:20,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:20,975 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:01:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:20,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:20,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:20,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:20,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:01:20,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:20,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:21,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458610309] [2020-10-13 15:01:21,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:21,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:21,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153752119] [2020-10-13 15:01:21,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:21,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:21,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:21,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:21,007 INFO L87 Difference]: Start difference. First operand 46496 states and 71606 transitions. Second operand 4 states. [2020-10-13 15:01:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:23,781 INFO L93 Difference]: Finished difference Result 83505 states and 128737 transitions. [2020-10-13 15:01:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:23,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 15:01:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:23,831 INFO L225 Difference]: With dead ends: 83505 [2020-10-13 15:01:23,831 INFO L226 Difference]: Without dead ends: 37088 [2020-10-13 15:01:23,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37088 states. [2020-10-13 15:01:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37088 to 37010. [2020-10-13 15:01:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37010 states. [2020-10-13 15:01:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37010 states to 37010 states and 56721 transitions. [2020-10-13 15:01:25,772 INFO L78 Accepts]: Start accepts. Automaton has 37010 states and 56721 transitions. Word has length 101 [2020-10-13 15:01:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:25,772 INFO L479 AbstractCegarLoop]: Abstraction has 37010 states and 56721 transitions. [2020-10-13 15:01:25,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 37010 states and 56721 transitions. [2020-10-13 15:01:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 15:01:25,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:25,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:25,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:01:25,774 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:25,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1793966216, now seen corresponding path program 1 times [2020-10-13 15:01:25,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:25,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710523790] [2020-10-13 15:01:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:27,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:28,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:28,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:31,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:31,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 15:01:31,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5990 [2020-10-13 15:01:31,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 15:01:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 15:01:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:31,995 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:01:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:32,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:32,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:32,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:32,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:32,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:32,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710523790] [2020-10-13 15:01:32,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:32,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:32,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303046555] [2020-10-13 15:01:32,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:32,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:32,020 INFO L87 Difference]: Start difference. First operand 37010 states and 56721 transitions. Second operand 4 states. [2020-10-13 15:01:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:33,573 INFO L93 Difference]: Finished difference Result 53082 states and 81385 transitions. [2020-10-13 15:01:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:33,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 15:01:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:33,595 INFO L225 Difference]: With dead ends: 53082 [2020-10-13 15:01:33,596 INFO L226 Difference]: Without dead ends: 16152 [2020-10-13 15:01:33,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16152 states. [2020-10-13 15:01:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16152 to 15738. [2020-10-13 15:01:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15738 states. [2020-10-13 15:01:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15738 states to 15738 states and 24048 transitions. [2020-10-13 15:01:34,485 INFO L78 Accepts]: Start accepts. Automaton has 15738 states and 24048 transitions. Word has length 101 [2020-10-13 15:01:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:34,485 INFO L479 AbstractCegarLoop]: Abstraction has 15738 states and 24048 transitions. [2020-10-13 15:01:34,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 15738 states and 24048 transitions. [2020-10-13 15:01:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 15:01:34,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:34,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:34,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 15:01:34,488 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -780411721, now seen corresponding path program 1 times [2020-10-13 15:01:34,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:34,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242200913] [2020-10-13 15:01:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:39,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:39,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 15:01:39,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:01:39,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:01:39,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:39,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:39,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 15:01:39,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 15:01:39,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:39,692 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:01:39,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:39,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 15:01:39,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242200913] [2020-10-13 15:01:39,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:39,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:39,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793037392] [2020-10-13 15:01:39,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:39,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:39,717 INFO L87 Difference]: Start difference. First operand 15738 states and 24048 transitions. Second operand 4 states. [2020-10-13 15:01:39,909 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 15:01:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:41,481 INFO L93 Difference]: Finished difference Result 35558 states and 54369 transitions. [2020-10-13 15:01:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:41,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-10-13 15:01:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:41,508 INFO L225 Difference]: With dead ends: 35558 [2020-10-13 15:01:41,508 INFO L226 Difference]: Without dead ends: 19928 [2020-10-13 15:01:41,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19928 states. [2020-10-13 15:01:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19928 to 19926. [2020-10-13 15:01:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19926 states. [2020-10-13 15:01:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19926 states to 19926 states and 30382 transitions. [2020-10-13 15:01:42,557 INFO L78 Accepts]: Start accepts. Automaton has 19926 states and 30382 transitions. Word has length 102 [2020-10-13 15:01:42,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:42,558 INFO L479 AbstractCegarLoop]: Abstraction has 19926 states and 30382 transitions. [2020-10-13 15:01:42,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 19926 states and 30382 transitions. [2020-10-13 15:01:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 15:01:42,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:42,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:42,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 15:01:42,560 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash -854832967, now seen corresponding path program 1 times [2020-10-13 15:01:42,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:42,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269342432] [2020-10-13 15:01:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:45,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:47,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:47,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 15:01:47,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:01:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:01:47,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:01:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:01:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:47,828 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:01:47,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:47,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:47,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:47,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:47,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:47,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:01:47,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269342432] [2020-10-13 15:01:47,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:47,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:47,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140855741] [2020-10-13 15:01:47,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:47,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:47,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:47,860 INFO L87 Difference]: Start difference. First operand 19926 states and 30382 transitions. Second operand 5 states. [2020-10-13 15:01:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:51,332 INFO L93 Difference]: Finished difference Result 58904 states and 89677 transitions. [2020-10-13 15:01:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:51,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-13 15:01:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:51,391 INFO L225 Difference]: With dead ends: 58904 [2020-10-13 15:01:51,391 INFO L226 Difference]: Without dead ends: 39007 [2020-10-13 15:01:51,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39007 states. [2020-10-13 15:01:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39007 to 39005. [2020-10-13 15:01:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39005 states. [2020-10-13 15:01:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39005 states to 39005 states and 59029 transitions. [2020-10-13 15:01:54,185 INFO L78 Accepts]: Start accepts. Automaton has 39005 states and 59029 transitions. Word has length 106 [2020-10-13 15:01:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:54,185 INFO L479 AbstractCegarLoop]: Abstraction has 39005 states and 59029 transitions. [2020-10-13 15:01:54,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39005 states and 59029 transitions. [2020-10-13 15:01:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 15:01:54,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:54,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:54,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 15:01:54,188 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1915617473, now seen corresponding path program 1 times [2020-10-13 15:01:54,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:54,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852011342] [2020-10-13 15:01:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:54,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:54,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:54,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:54,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:54,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:59,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:59,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:59,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 15:01:59,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:01:59,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:01:59,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:59,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:59,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 15:01:59,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 15:01:59,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:59,401 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:01:59,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:59,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:01:59,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852011342] [2020-10-13 15:01:59,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:59,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:59,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115233345] [2020-10-13 15:01:59,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:59,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:59,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:59,425 INFO L87 Difference]: Start difference. First operand 39005 states and 59029 transitions. Second operand 4 states. [2020-10-13 15:02:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:05,509 INFO L93 Difference]: Finished difference Result 116969 states and 177015 transitions. [2020-10-13 15:02:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:02:05,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-13 15:02:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:05,613 INFO L225 Difference]: With dead ends: 116969 [2020-10-13 15:02:05,613 INFO L226 Difference]: Without dead ends: 77996 [2020-10-13 15:02:05,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77996 states. [2020-10-13 15:02:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77996 to 39007. [2020-10-13 15:02:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39007 states. [2020-10-13 15:02:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39007 states to 39007 states and 59031 transitions. [2020-10-13 15:02:08,835 INFO L78 Accepts]: Start accepts. Automaton has 39007 states and 59031 transitions. Word has length 107 [2020-10-13 15:02:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:08,835 INFO L479 AbstractCegarLoop]: Abstraction has 39007 states and 59031 transitions. [2020-10-13 15:02:08,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:02:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39007 states and 59031 transitions. [2020-10-13 15:02:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 15:02:08,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:08,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:02:08,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 15:02:08,839 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -725902086, now seen corresponding path program 1 times [2020-10-13 15:02:08,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:08,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988139284] [2020-10-13 15:02:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:08,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:09,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:09,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:09,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:13,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:13,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 15:02:13,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:02:13,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 15:02:13,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:13,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:13,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 15:02:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:02:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:14,093 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:02:14,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:14,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:14,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:14,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:02:14,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988139284] [2020-10-13 15:02:14,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:14,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:14,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025176353] [2020-10-13 15:02:14,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:14,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:14,120 INFO L87 Difference]: Start difference. First operand 39007 states and 59031 transitions. Second operand 5 states. [2020-10-13 15:02:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:17,370 INFO L93 Difference]: Finished difference Result 77996 states and 118036 transitions. [2020-10-13 15:02:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:17,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 15:02:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:17,419 INFO L225 Difference]: With dead ends: 77996 [2020-10-13 15:02:17,419 INFO L226 Difference]: Without dead ends: 39007 [2020-10-13 15:02:17,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39007 states. [2020-10-13 15:02:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39007 to 39006. [2020-10-13 15:02:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39006 states. [2020-10-13 15:02:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39006 states to 39006 states and 59027 transitions. [2020-10-13 15:02:20,281 INFO L78 Accepts]: Start accepts. Automaton has 39006 states and 59027 transitions. Word has length 108 [2020-10-13 15:02:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:20,282 INFO L479 AbstractCegarLoop]: Abstraction has 39006 states and 59027 transitions. [2020-10-13 15:02:20,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 39006 states and 59027 transitions. [2020-10-13 15:02:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 15:02:20,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:20,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:02:20,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:02:20,285 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash 643682407, now seen corresponding path program 1 times [2020-10-13 15:02:20,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:20,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836421955] [2020-10-13 15:02:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:20,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:25,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:02:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:25,526 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:02:25,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:25,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:25,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:25,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:25,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:02:25,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:25,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:25,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:02:25,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836421955] [2020-10-13 15:02:25,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:25,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:25,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498653269] [2020-10-13 15:02:25,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:25,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:25,551 INFO L87 Difference]: Start difference. First operand 39006 states and 59027 transitions. Second operand 5 states. [2020-10-13 15:02:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:31,884 INFO L93 Difference]: Finished difference Result 113950 states and 172033 transitions. [2020-10-13 15:02:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:31,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 15:02:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:31,988 INFO L225 Difference]: With dead ends: 113950 [2020-10-13 15:02:31,988 INFO L226 Difference]: Without dead ends: 74983 [2020-10-13 15:02:32,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74983 states. [2020-10-13 15:02:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74983 to 74981. [2020-10-13 15:02:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74981 states. [2020-10-13 15:02:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74981 states to 74981 states and 112171 transitions. [2020-10-13 15:02:39,400 INFO L78 Accepts]: Start accepts. Automaton has 74981 states and 112171 transitions. Word has length 108 [2020-10-13 15:02:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:39,400 INFO L479 AbstractCegarLoop]: Abstraction has 74981 states and 112171 transitions. [2020-10-13 15:02:39,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74981 states and 112171 transitions. [2020-10-13 15:02:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 15:02:39,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:39,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:02:39,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 15:02:39,406 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash -55079094, now seen corresponding path program 1 times [2020-10-13 15:02:39,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:39,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274156868] [2020-10-13 15:02:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:39,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:44,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:44,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 15:02:44,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:02:44,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-13 15:02:44,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:02:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 15:02:44,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:44,785 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:02:44,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:44,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:44,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:44,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:44,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:02:44,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:02:44,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274156868] [2020-10-13 15:02:44,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:44,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:44,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502845895] [2020-10-13 15:02:44,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:44,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:44,824 INFO L87 Difference]: Start difference. First operand 74981 states and 112171 transitions. Second operand 5 states. [2020-10-13 15:02:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:55,179 INFO L93 Difference]: Finished difference Result 186554 states and 278612 transitions. [2020-10-13 15:02:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:55,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 15:02:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:55,361 INFO L225 Difference]: With dead ends: 186554 [2020-10-13 15:02:55,361 INFO L226 Difference]: Without dead ends: 111626 [2020-10-13 15:02:55,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111626 states. [2020-10-13 15:03:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111626 to 111624. [2020-10-13 15:03:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111624 states. [2020-10-13 15:03:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111624 states to 111624 states and 165291 transitions. [2020-10-13 15:03:07,598 INFO L78 Accepts]: Start accepts. Automaton has 111624 states and 165291 transitions. Word has length 108 [2020-10-13 15:03:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:03:07,598 INFO L479 AbstractCegarLoop]: Abstraction has 111624 states and 165291 transitions. [2020-10-13 15:03:07,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:03:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 111624 states and 165291 transitions. [2020-10-13 15:03:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 15:03:07,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:03:07,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:03:07,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 15:03:07,605 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:03:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:03:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1933625183, now seen corresponding path program 1 times [2020-10-13 15:03:07,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:03:07,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18354414] [2020-10-13 15:03:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:03:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:08,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:08,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:09,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:09,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:12,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:12,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 15:03:12,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:03:12,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 15:03:12,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:12,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:03:12,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 15:03:12,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:03:12,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:12,833 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:03:12,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:03:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:12,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:12,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:03:12,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:03:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:03:12,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:12,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:03:12,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:03:12,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:03:12,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:03:12,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18354414] [2020-10-13 15:03:12,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:03:12,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:03:12,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938284665] [2020-10-13 15:03:12,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:03:12,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:03:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:03:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:03:12,857 INFO L87 Difference]: Start difference. First operand 111624 states and 165291 transitions. Second operand 4 states. [2020-10-13 15:03:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:03:29,124 INFO L93 Difference]: Finished difference Result 260521 states and 387168 transitions. [2020-10-13 15:03:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:03:29,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-13 15:03:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:03:29,356 INFO L225 Difference]: With dead ends: 260521 [2020-10-13 15:03:29,357 INFO L226 Difference]: Without dead ends: 149244 [2020-10-13 15:03:29,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:03:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149244 states.