/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_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:47:13,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:47:13,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:47:13,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:47:13,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:47:13,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:47:13,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:47:13,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:47:13,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:47:13,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:47:13,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:47:13,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:47:13,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:47:13,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:47:13,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:47:13,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:47:13,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:47:13,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:47:13,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:47:13,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:47:13,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:47:13,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:47:13,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:47:13,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:47:13,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:47:13,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:47:13,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:47:13,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:47:13,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:47:13,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:47:13,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:47:13,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:47:13,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:47:13,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:47:13,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:47:13,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:47:13,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:47:13,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:47:13,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:47:13,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:47:13,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:47:13,888 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 14:47:13,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:47:13,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:47:13,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:47:13,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:47:13,912 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:47:13,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:47:13,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:47:13,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:47:13,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:47:13,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:47:13,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:47:13,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:47:13,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:47:13,914 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:47:13,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:47:13,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:47:13,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:47:13,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:47:13,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:47:13,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:47:13,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:47:13,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:47:13,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:47:13,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:47:13,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:47:13,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:47:13,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:47:13,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:47:13,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:47:13,917 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 14:47:14,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:47:14,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:47:14,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:47:14,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:47:14,250 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:47:14,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:47:14,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/120a75fa0/356c38ab31a54461ae6c8c1f4714c56f/FLAG761537829 [2020-10-13 14:47:14,821 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:47:14,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:47:14,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/120a75fa0/356c38ab31a54461ae6c8c1f4714c56f/FLAG761537829 [2020-10-13 14:47:15,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/120a75fa0/356c38ab31a54461ae6c8c1f4714c56f [2020-10-13 14:47:15,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:47:15,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:47:15,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:47:15,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:47:15,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:47:15,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@372b110e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15, skipping insertion in model container [2020-10-13 14:47:15,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:47:15,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:47:15,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:47:15,527 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:47:15,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:47:15,753 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:47:15,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15 WrapperNode [2020-10-13 14:47:15,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:47:15,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:47:15,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:47:15,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:47:15,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (1/1) ... [2020-10-13 14:47:15,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:47:15,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:47:15,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:47:15,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:47:15,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (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 14:47:15,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:47:15,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:47:15,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:47:15,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:47:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:47:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:47:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:47:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:47:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:47:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:47:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:47:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:47:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:47:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:47:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:47:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:47:16,563 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:47:16,563 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:47:16,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:47:16 BoogieIcfgContainer [2020-10-13 14:47:16,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:47:16,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:47:16,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:47:16,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:47:16,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:47:15" (1/3) ... [2020-10-13 14:47:16,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c7ab81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:47:16, skipping insertion in model container [2020-10-13 14:47:16,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:47:15" (2/3) ... [2020-10-13 14:47:16,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c7ab81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:47:16, skipping insertion in model container [2020-10-13 14:47:16,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:47:16" (3/3) ... [2020-10-13 14:47:16,586 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:47:16,597 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:47:16,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:47:16,620 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:47:16,642 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:47:16,642 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:47:16,642 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:47:16,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:47:16,642 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:47:16,642 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:47:16,643 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:47:16,643 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:47:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-10-13 14:47:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:47:16,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:16,680 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] [2020-10-13 14:47:16,680 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash 945833182, now seen corresponding path program 1 times [2020-10-13 14:47:16,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:16,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33928849] [2020-10-13 14:47:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:17,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:17,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:17,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:21,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:21,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:47:21,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:47:21,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 14:47:21,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:21,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:47:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:47:22,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 14:47:22,408 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:22,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:22,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:22,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:22,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:22,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:47:22,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:22,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:22,468 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 14:47:22,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33928849] [2020-10-13 14:47:22,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:22,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:47:22,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364535952] [2020-10-13 14:47:22,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:47:22,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:22,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:47:22,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:47:22,499 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 4 states. [2020-10-13 14:47:22,767 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:47:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:23,547 INFO L93 Difference]: Finished difference Result 314 states and 505 transitions. [2020-10-13 14:47:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:47:23,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 14:47:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:23,574 INFO L225 Difference]: With dead ends: 314 [2020-10-13 14:47:23,574 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 14:47:23,579 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 14:47:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 14:47:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 14:47:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 14:47:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 307 transitions. [2020-10-13 14:47:23,650 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 307 transitions. Word has length 64 [2020-10-13 14:47:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:23,651 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 307 transitions. [2020-10-13 14:47:23,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:47:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 307 transitions. [2020-10-13 14:47:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:47:23,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:23,655 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] [2020-10-13 14:47:23,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:47:23,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash 717537107, now seen corresponding path program 1 times [2020-10-13 14:47:23,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:23,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958670119] [2020-10-13 14:47:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:23,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:23,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:27,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:27,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:47:27,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:47:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3351 [2020-10-13 14:47:27,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:47:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:47:27,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:27,239 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:27,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:27,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:27,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:27,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:27,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:47:27,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:27,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:27,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:27,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:27,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:27,273 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 14:47:27,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958670119] [2020-10-13 14:47:27,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:27,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:47:27,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102099761] [2020-10-13 14:47:27,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:47:27,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:47:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:47:27,277 INFO L87 Difference]: Start difference. First operand 207 states and 307 transitions. Second operand 4 states. [2020-10-13 14:47:27,452 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:47:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:28,074 INFO L93 Difference]: Finished difference Result 511 states and 791 transitions. [2020-10-13 14:47:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:47:28,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:47:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:28,079 INFO L225 Difference]: With dead ends: 511 [2020-10-13 14:47:28,079 INFO L226 Difference]: Without dead ends: 343 [2020-10-13 14:47:28,081 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 14:47:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-13 14:47:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2020-10-13 14:47:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-13 14:47:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 520 transitions. [2020-10-13 14:47:28,115 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 520 transitions. Word has length 65 [2020-10-13 14:47:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:28,115 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 520 transitions. [2020-10-13 14:47:28,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:47:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 520 transitions. [2020-10-13 14:47:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:47:28,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:28,118 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 14:47:28,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:47:28,119 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1771752850, now seen corresponding path program 1 times [2020-10-13 14:47:28,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:28,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275388489] [2020-10-13 14:47:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:28,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:28,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:28,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:28,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:29,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:29,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:47:29,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:47:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1522 [2020-10-13 14:47:29,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:29,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:47:29,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:47:29,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:29,932 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:29,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:29,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:29,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:29,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:29,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:47:29,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:29,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:29,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:29,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:29,988 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 14:47:29,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275388489] [2020-10-13 14:47:29,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:29,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:47:29,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975127959] [2020-10-13 14:47:29,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:47:29,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:47:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:47:29,995 INFO L87 Difference]: Start difference. First operand 341 states and 520 transitions. Second operand 4 states. [2020-10-13 14:47:30,241 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:47:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:30,970 INFO L93 Difference]: Finished difference Result 901 states and 1410 transitions. [2020-10-13 14:47:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:47:30,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:47:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:30,977 INFO L225 Difference]: With dead ends: 901 [2020-10-13 14:47:30,978 INFO L226 Difference]: Without dead ends: 599 [2020-10-13 14:47:30,983 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 14:47:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-13 14:47:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2020-10-13 14:47:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-13 14:47:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 924 transitions. [2020-10-13 14:47:31,036 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 924 transitions. Word has length 66 [2020-10-13 14:47:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:31,037 INFO L479 AbstractCegarLoop]: Abstraction has 597 states and 924 transitions. [2020-10-13 14:47:31,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:47:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 924 transitions. [2020-10-13 14:47:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:47:31,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:31,047 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 14:47:31,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:47:31,048 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1999258147, now seen corresponding path program 1 times [2020-10-13 14:47:31,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:31,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533327521] [2020-10-13 14:47:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:31,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:32,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:32,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:47:32,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:47:32,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-13 14:47:32,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:47:32,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 14:47:32,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:32,276 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:32,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:32,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:32,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:32,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:32,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 14:47:32,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:32,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:32,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:32,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:32,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:32,343 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 14:47:32,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533327521] [2020-10-13 14:47:32,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:32,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:47:32,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894041535] [2020-10-13 14:47:32,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:47:32,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:47:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:47:32,349 INFO L87 Difference]: Start difference. First operand 597 states and 924 transitions. Second operand 4 states. [2020-10-13 14:47:32,562 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:47:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:33,259 INFO L93 Difference]: Finished difference Result 1585 states and 2486 transitions. [2020-10-13 14:47:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:47:33,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:47:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:33,269 INFO L225 Difference]: With dead ends: 1585 [2020-10-13 14:47:33,269 INFO L226 Difference]: Without dead ends: 1027 [2020-10-13 14:47:33,271 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 14:47:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2020-10-13 14:47:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1025. [2020-10-13 14:47:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2020-10-13 14:47:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1592 transitions. [2020-10-13 14:47:33,340 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1592 transitions. Word has length 66 [2020-10-13 14:47:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:33,342 INFO L479 AbstractCegarLoop]: Abstraction has 1025 states and 1592 transitions. [2020-10-13 14:47:33,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:47:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1592 transitions. [2020-10-13 14:47:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:47:33,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:33,348 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 14:47:33,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:47:33,349 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1675204179, now seen corresponding path program 1 times [2020-10-13 14:47:33,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:33,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226233317] [2020-10-13 14:47:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:33,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:33,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:33,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:33,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:47:33,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:33,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-13 14:47:33,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:47:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:47:33,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:34,009 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:34,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:34,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:34,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:34,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:34,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:47:34,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:34,041 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 14:47:34,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226233317] [2020-10-13 14:47:34,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:34,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:47:34,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727805951] [2020-10-13 14:47:34,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:47:34,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:34,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:47:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:47:34,044 INFO L87 Difference]: Start difference. First operand 1025 states and 1592 transitions. Second operand 4 states. [2020-10-13 14:47:34,244 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:47:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:34,878 INFO L93 Difference]: Finished difference Result 2741 states and 4282 transitions. [2020-10-13 14:47:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:47:34,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:47:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:34,889 INFO L225 Difference]: With dead ends: 2741 [2020-10-13 14:47:34,889 INFO L226 Difference]: Without dead ends: 1755 [2020-10-13 14:47:34,891 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 14:47:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2020-10-13 14:47:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1753. [2020-10-13 14:47:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1753 states. [2020-10-13 14:47:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2712 transitions. [2020-10-13 14:47:34,988 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2712 transitions. Word has length 67 [2020-10-13 14:47:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:34,988 INFO L479 AbstractCegarLoop]: Abstraction has 1753 states and 2712 transitions. [2020-10-13 14:47:34,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:47:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2712 transitions. [2020-10-13 14:47:34,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:47:34,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:34,990 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 14:47:34,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:47:34,991 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1043573223, now seen corresponding path program 1 times [2020-10-13 14:47:34,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:34,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899229848] [2020-10-13 14:47:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:35,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:36,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:36,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:47:36,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-13 14:47:36,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:47:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:47:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:47:36,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:36,359 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:36,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:36,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:36,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:36,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:36,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:47:36,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:36,413 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 14:47:36,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899229848] [2020-10-13 14:47:36,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:36,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:47:36,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651941914] [2020-10-13 14:47:36,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:47:36,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:47:36,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:47:36,417 INFO L87 Difference]: Start difference. First operand 1753 states and 2712 transitions. Second operand 8 states. [2020-10-13 14:47:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:38,217 INFO L93 Difference]: Finished difference Result 9043 states and 13965 transitions. [2020-10-13 14:47:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:47:38,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-13 14:47:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:38,258 INFO L225 Difference]: With dead ends: 9043 [2020-10-13 14:47:38,258 INFO L226 Difference]: Without dead ends: 7329 [2020-10-13 14:47:38,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:47:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2020-10-13 14:47:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 7321. [2020-10-13 14:47:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7321 states. [2020-10-13 14:47:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 11256 transitions. [2020-10-13 14:47:38,709 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 11256 transitions. Word has length 68 [2020-10-13 14:47:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:38,710 INFO L479 AbstractCegarLoop]: Abstraction has 7321 states and 11256 transitions. [2020-10-13 14:47:38,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:47:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 11256 transitions. [2020-10-13 14:47:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:47:38,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:38,711 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 14:47:38,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:47:38,712 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1920602480, now seen corresponding path program 1 times [2020-10-13 14:47:38,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:38,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700294375] [2020-10-13 14:47:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:38,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:38,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:39,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:39,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:47:39,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:39,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-13 14:47:39,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:47:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:47:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:47:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:39,702 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:39,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:39,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:39,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:39,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:47:39,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:47:39,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:39,763 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 14:47:39,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700294375] [2020-10-13 14:47:39,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:39,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:39,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583589138] [2020-10-13 14:47:39,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:47:39,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:39,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:47:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:39,767 INFO L87 Difference]: Start difference. First operand 7321 states and 11256 transitions. Second operand 6 states. [2020-10-13 14:47:39,982 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-13 14:47:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:41,318 INFO L93 Difference]: Finished difference Result 21757 states and 33434 transitions. [2020-10-13 14:47:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:47:41,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-13 14:47:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:41,389 INFO L225 Difference]: With dead ends: 21757 [2020-10-13 14:47:41,390 INFO L226 Difference]: Without dead ends: 14475 [2020-10-13 14:47:41,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:47:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14475 states. [2020-10-13 14:47:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14475 to 14473. [2020-10-13 14:47:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14473 states. [2020-10-13 14:47:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 22088 transitions. [2020-10-13 14:47:42,271 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 22088 transitions. Word has length 70 [2020-10-13 14:47:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:42,271 INFO L479 AbstractCegarLoop]: Abstraction has 14473 states and 22088 transitions. [2020-10-13 14:47:42,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:47:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 22088 transitions. [2020-10-13 14:47:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:47:42,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:42,273 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 14:47:42,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:47:42,273 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1423509013, now seen corresponding path program 1 times [2020-10-13 14:47:42,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:42,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414427472] [2020-10-13 14:47:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:42,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:42,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:42,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:47:42,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:42,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-13 14:47:42,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:47:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:47:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:47:42,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:42,737 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:42,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:42,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:42,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:42,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:42,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:42,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:47:42,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:42,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:42,779 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 14:47:42,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414427472] [2020-10-13 14:47:42,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:42,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:47:42,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810529551] [2020-10-13 14:47:42,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:47:42,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:42,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:47:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:47:42,785 INFO L87 Difference]: Start difference. First operand 14473 states and 22088 transitions. Second operand 8 states. [2020-10-13 14:47:42,998 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:47:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:46,415 INFO L93 Difference]: Finished difference Result 73765 states and 112702 transitions. [2020-10-13 14:47:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:47:46,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-13 14:47:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:46,570 INFO L225 Difference]: With dead ends: 73765 [2020-10-13 14:47:46,570 INFO L226 Difference]: Without dead ends: 59331 [2020-10-13 14:47:46,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:47:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59331 states. [2020-10-13 14:47:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59331 to 28905. [2020-10-13 14:47:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28905 states. [2020-10-13 14:47:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28905 states to 28905 states and 43496 transitions. [2020-10-13 14:47:48,372 INFO L78 Accepts]: Start accepts. Automaton has 28905 states and 43496 transitions. Word has length 70 [2020-10-13 14:47:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:48,372 INFO L479 AbstractCegarLoop]: Abstraction has 28905 states and 43496 transitions. [2020-10-13 14:47:48,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:47:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 28905 states and 43496 transitions. [2020-10-13 14:47:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:47:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:48,374 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 14:47:48,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:47:48,374 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1160573730, now seen corresponding path program 1 times [2020-10-13 14:47:48,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:48,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553720764] [2020-10-13 14:47:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:48,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:48,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:47:48,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:48,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-13 14:47:48,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:47:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 14:47:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:47:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:48,719 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:48,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:48,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:48,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:48,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:48,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:48,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:47:48,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:48,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:48,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:48,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:48,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:48,878 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 14:47:48,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553720764] [2020-10-13 14:47:48,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:48,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:48,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548096519] [2020-10-13 14:47:48,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:47:48,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:47:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:47:48,880 INFO L87 Difference]: Start difference. First operand 28905 states and 43496 transitions. Second operand 5 states. [2020-10-13 14:47:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:52,042 INFO L93 Difference]: Finished difference Result 59051 states and 88233 transitions. [2020-10-13 14:47:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:47:52,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-13 14:47:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:52,220 INFO L225 Difference]: With dead ends: 59051 [2020-10-13 14:47:52,220 INFO L226 Difference]: Without dead ends: 59049 [2020-10-13 14:47:52,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 14:47:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59049 states. [2020-10-13 14:47:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59049 to 30185. [2020-10-13 14:47:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30185 states. [2020-10-13 14:47:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30185 states to 30185 states and 44776 transitions. [2020-10-13 14:47:54,153 INFO L78 Accepts]: Start accepts. Automaton has 30185 states and 44776 transitions. Word has length 71 [2020-10-13 14:47:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:54,154 INFO L479 AbstractCegarLoop]: Abstraction has 30185 states and 44776 transitions. [2020-10-13 14:47:54,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:47:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 30185 states and 44776 transitions. [2020-10-13 14:47:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:47:54,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:54,155 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 14:47:54,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:47:54,155 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1627667044, now seen corresponding path program 1 times [2020-10-13 14:47:54,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:54,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440667128] [2020-10-13 14:47:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:54,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:54,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:47:54,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:54,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 14:47:54,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:47:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:47:54,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:54,466 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:54,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:54,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:54,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:54,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:47:54,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:54,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:54,497 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 14:47:54,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440667128] [2020-10-13 14:47:54,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:54,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:47:54,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787033969] [2020-10-13 14:47:54,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:47:54,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:47:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:47:54,499 INFO L87 Difference]: Start difference. First operand 30185 states and 44776 transitions. Second operand 4 states. [2020-10-13 14:47:54,654 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-13 14:47:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:57,805 INFO L93 Difference]: Finished difference Result 73559 states and 109060 transitions. [2020-10-13 14:47:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:47:57,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:47:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:57,895 INFO L225 Difference]: With dead ends: 73559 [2020-10-13 14:47:57,895 INFO L226 Difference]: Without dead ends: 43413 [2020-10-13 14:47:57,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:47:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43413 states. [2020-10-13 14:48:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43413 to 43411. [2020-10-13 14:48:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43411 states. [2020-10-13 14:48:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43411 states to 43411 states and 64034 transitions. [2020-10-13 14:48:00,280 INFO L78 Accepts]: Start accepts. Automaton has 43411 states and 64034 transitions. Word has length 72 [2020-10-13 14:48:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:00,281 INFO L479 AbstractCegarLoop]: Abstraction has 43411 states and 64034 transitions. [2020-10-13 14:48:00,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 43411 states and 64034 transitions. [2020-10-13 14:48:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:48:00,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:00,299 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] [2020-10-13 14:48:00,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:48:00,299 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash -753977685, now seen corresponding path program 1 times [2020-10-13 14:48:00,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:00,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148908405] [2020-10-13 14:48:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:00,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:03,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:03,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:48:03,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2791 [2020-10-13 14:48:03,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 14:48:03,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:03,620 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:48:03,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:03,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:48:03,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:03,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:03,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:03,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148908405] [2020-10-13 14:48:03,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:48:03,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:48:03,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178045963] [2020-10-13 14:48:03,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:03,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:03,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:03,676 INFO L87 Difference]: Start difference. First operand 43411 states and 64034 transitions. Second operand 9 states. [2020-10-13 14:48:03,878 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:48:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:23,127 INFO L93 Difference]: Finished difference Result 250367 states and 366386 transitions. [2020-10-13 14:48:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:48:23,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2020-10-13 14:48:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:23,471 INFO L225 Difference]: With dead ends: 250367 [2020-10-13 14:48:23,471 INFO L226 Difference]: Without dead ends: 213837 [2020-10-13 14:48:23,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:48:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213837 states. [2020-10-13 14:48:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213837 to 72723. [2020-10-13 14:48:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72723 states. [2020-10-13 14:48:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72723 states to 72723 states and 106738 transitions. [2020-10-13 14:48:29,662 INFO L78 Accepts]: Start accepts. Automaton has 72723 states and 106738 transitions. Word has length 97 [2020-10-13 14:48:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:29,662 INFO L479 AbstractCegarLoop]: Abstraction has 72723 states and 106738 transitions. [2020-10-13 14:48:29,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:48:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 72723 states and 106738 transitions. [2020-10-13 14:48:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:48:29,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:29,684 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] [2020-10-13 14:48:29,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:48:29,684 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash 810644738, now seen corresponding path program 1 times [2020-10-13 14:48:29,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:29,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561607382] [2020-10-13 14:48:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:29,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:30,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:30,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:48:30,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:30,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-13 14:48:30,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:30,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:30,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:30,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 14:48:30,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:30,388 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:48:30,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:30,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:30,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:30,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:30,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:30,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:48:30,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:30,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 14:48:30,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561607382] [2020-10-13 14:48:30,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:30,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:30,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823606600] [2020-10-13 14:48:30,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:30,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:30,446 INFO L87 Difference]: Start difference. First operand 72723 states and 106738 transitions. Second operand 6 states. [2020-10-13 14:48:30,622 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:48:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:42,400 INFO L93 Difference]: Finished difference Result 218087 states and 320132 transitions. [2020-10-13 14:48:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:42,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-13 14:48:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:42,583 INFO L225 Difference]: With dead ends: 218087 [2020-10-13 14:48:42,583 INFO L226 Difference]: Without dead ends: 145405 [2020-10-13 14:48:42,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145405 states. [2020-10-13 14:48:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145405 to 145403. [2020-10-13 14:48:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145403 states. [2020-10-13 14:48:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145403 states to 145403 states and 212306 transitions. [2020-10-13 14:48:56,240 INFO L78 Accepts]: Start accepts. Automaton has 145403 states and 212306 transitions. Word has length 97 [2020-10-13 14:48:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:56,240 INFO L479 AbstractCegarLoop]: Abstraction has 145403 states and 212306 transitions. [2020-10-13 14:48:56,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 145403 states and 212306 transitions. [2020-10-13 14:48:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:48:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:56,267 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] [2020-10-13 14:48:56,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:48:56,268 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash -264687641, now seen corresponding path program 1 times [2020-10-13 14:48:56,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:56,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827558014] [2020-10-13 14:48:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:56,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:58,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:58,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:48:58,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:58,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-13 14:48:58,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:58,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:58,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:58,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 14:48:58,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:58,434 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:48:58,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:58,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:58,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:58,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:58,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:58,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:48:58,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:58,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:58,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:48:58,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827558014] [2020-10-13 14:48:58,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:48:58,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:48:58,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40594017] [2020-10-13 14:48:58,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:58,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:58,506 INFO L87 Difference]: Start difference. First operand 145403 states and 212306 transitions. Second operand 9 states. [2020-10-13 14:48:58,820 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:50:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:03,329 INFO L93 Difference]: Finished difference Result 715789 states and 1032118 transitions. [2020-10-13 14:50:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:50:03,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2020-10-13 14:50:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:04,215 INFO L225 Difference]: With dead ends: 715789 [2020-10-13 14:50:04,216 INFO L226 Difference]: Without dead ends: 634451 [2020-10-13 14:50:04,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:50:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634451 states. [2020-10-13 14:50:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634451 to 238801. [2020-10-13 14:50:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238801 states. [2020-10-13 14:50:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238801 states to 238801 states and 346848 transitions. [2020-10-13 14:50:35,510 INFO L78 Accepts]: Start accepts. Automaton has 238801 states and 346848 transitions. Word has length 97 [2020-10-13 14:50:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:35,511 INFO L479 AbstractCegarLoop]: Abstraction has 238801 states and 346848 transitions. [2020-10-13 14:50:35,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:50:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 238801 states and 346848 transitions. [2020-10-13 14:50:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:50:35,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:35,537 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] [2020-10-13 14:50:35,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:50:35,538 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash 718417008, now seen corresponding path program 1 times [2020-10-13 14:50:35,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:35,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190477977] [2020-10-13 14:50:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:35,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:36,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:36,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:50:36,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:36,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-13 14:50:36,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:36,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:50:36,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:36,265 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:36,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:36,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:36,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:36,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:36,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 14:50:36,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:36,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:36,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 14:50:36,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190477977] [2020-10-13 14:50:36,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:36,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:36,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277447645] [2020-10-13 14:50:36,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:36,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:36,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:36,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:36,354 INFO L87 Difference]: Start difference. First operand 238801 states and 346848 transitions. Second operand 6 states. [2020-10-13 14:50:37,448 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 153