/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:16:13,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:16:13,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:16:13,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:16:13,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:16:13,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:16:13,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:16:13,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:16:13,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:16:13,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:16:13,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:16:13,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:16:13,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:16:13,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:16:13,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:16:13,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:16:13,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:16:13,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:16:13,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:16:13,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:16:13,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:16:13,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:16:13,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:16:13,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:16:13,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:16:13,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:16:13,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:16:13,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:16:13,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:16:13,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:16:13,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:16:13,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:16:13,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:16:13,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:16:13,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:16:13,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:16:13,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:16:13,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:16:13,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:16:13,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:16:13,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:16:13,714 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 [2020-10-27 05:16:13,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:16:13,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:16:13,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:16:13,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:16:13,770 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:16:13,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:16:13,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:16:13,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:16:13,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:16:13,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:16:13,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:16:13,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:16:13,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:16:13,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:16:13,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:16:13,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:16:13,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:16:13,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:16:13,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:16:13,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:16:13,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:16:13,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:16:13,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:16:13,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:16:13,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:16:13,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:16:13,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:16:13,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:16:13,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:16:13,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:16:14,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:16:14,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:16:14,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:16:14,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:16:14,251 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:16:14,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:16:14,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eece29ffd/00149957be8b4c54969bcaa8707f5adb/FLAGd44328c0d [2020-10-27 05:16:15,116 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:16:15,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:16:15,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eece29ffd/00149957be8b4c54969bcaa8707f5adb/FLAGd44328c0d [2020-10-27 05:16:15,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eece29ffd/00149957be8b4c54969bcaa8707f5adb [2020-10-27 05:16:15,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:16:15,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:16:15,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:16:15,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:16:15,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:16:15,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aca9a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15, skipping insertion in model container [2020-10-27 05:16:15,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:16:15,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:16:15,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:16:15,770 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:16:15,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:16:15,902 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:16:15,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15 WrapperNode [2020-10-27 05:16:15,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:16:15,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:16:15,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:16:15,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:16:15,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:15,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (1/1) ... [2020-10-27 05:16:16,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:16:16,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:16:16,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:16:16,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:16:16,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (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 [2020-10-27 05:16:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:16:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:16:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:16:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:16:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:16:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:16:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:16:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:16:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:16:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:16:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:16:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:16:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:16:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:16:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:16:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:16:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:16:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:16:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:16:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:16:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:16:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:16:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:16:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:16:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:16:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:16:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:16:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:16:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:16:16,747 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:16:16,747 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:16:16,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:16:16 BoogieIcfgContainer [2020-10-27 05:16:16,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:16:16,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:16:16,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:16:16,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:16:16,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:16:15" (1/3) ... [2020-10-27 05:16:16,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1362acbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:16:16, skipping insertion in model container [2020-10-27 05:16:16,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:16:15" (2/3) ... [2020-10-27 05:16:16,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1362acbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:16:16, skipping insertion in model container [2020-10-27 05:16:16,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:16:16" (3/3) ... [2020-10-27 05:16:16,758 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:16:16,771 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:16:16,776 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:16:16,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:16:16,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:16:16,820 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:16:16,820 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:16:16,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:16:16,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:16:16,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:16:16,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:16:16,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:16:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-10-27 05:16:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:16:16,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:16,851 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] [2020-10-27 05:16:16,851 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1579954712, now seen corresponding path program 1 times [2020-10-27 05:16:16,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:16,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300748758] [2020-10-27 05:16:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:17,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:22,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:22,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:16:22,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:16:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:16:22,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:16:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:22,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:16:22,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:16:22,555 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:22,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:22,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:22,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:22,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:22,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 05:16:22,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:22,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:22,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300748758] [2020-10-27 05:16:22,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:22,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:16:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813159984] [2020-10-27 05:16:22,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:16:22,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:22,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:16:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:16:22,694 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 6 states. [2020-10-27 05:16:22,989 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:16:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:23,543 INFO L93 Difference]: Finished difference Result 155 states and 238 transitions. [2020-10-27 05:16:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:16:23,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 05:16:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:23,558 INFO L225 Difference]: With dead ends: 155 [2020-10-27 05:16:23,558 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 05:16:23,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:16:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 05:16:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 05:16:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 05:16:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 112 transitions. [2020-10-27 05:16:23,622 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 112 transitions. Word has length 53 [2020-10-27 05:16:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:23,623 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 112 transitions. [2020-10-27 05:16:23,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:16:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 112 transitions. [2020-10-27 05:16:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:16:23,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:23,626 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] [2020-10-27 05:16:23,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:16:23,626 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1451869405, now seen corresponding path program 1 times [2020-10-27 05:16:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:23,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519291349] [2020-10-27 05:16:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:23,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:25,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:25,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:16:25,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:16:25,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2100 [2020-10-27 05:16:25,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:16:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:16:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:26,047 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:26,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:26,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:26,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:26,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:16:26,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:26,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519291349] [2020-10-27 05:16:26,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:26,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:16:26,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701336824] [2020-10-27 05:16:26,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:26,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:26,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:26,102 INFO L87 Difference]: Start difference. First operand 83 states and 112 transitions. Second operand 7 states. [2020-10-27 05:16:26,332 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:16:26,939 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:16:27,136 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:16:27,286 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:16:27,554 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:16:27,719 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:16:27,908 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:27,971 INFO L93 Difference]: Finished difference Result 507 states and 768 transitions. [2020-10-27 05:16:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:16:27,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 05:16:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:27,978 INFO L225 Difference]: With dead ends: 507 [2020-10-27 05:16:27,978 INFO L226 Difference]: Without dead ends: 454 [2020-10-27 05:16:27,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:16:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-27 05:16:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 133. [2020-10-27 05:16:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 05:16:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 190 transitions. [2020-10-27 05:16:28,020 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 190 transitions. Word has length 53 [2020-10-27 05:16:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:28,021 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 190 transitions. [2020-10-27 05:16:28,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 190 transitions. [2020-10-27 05:16:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:16:28,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:28,023 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] [2020-10-27 05:16:28,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:16:28,024 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1075904142, now seen corresponding path program 1 times [2020-10-27 05:16:28,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439222129] [2020-10-27 05:16:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:28,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:28,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:33,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:33,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:16:33,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:16:33,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:16:33,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:33,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:33,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:16:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:33,476 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:33,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:33,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:33,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:33,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:33,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:33,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 05:16:33,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:33,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:33,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:33,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439222129] [2020-10-27 05:16:33,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:33,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:16:33,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102325258] [2020-10-27 05:16:33,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:33,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:33,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:33,582 INFO L87 Difference]: Start difference. First operand 133 states and 190 transitions. Second operand 7 states. [2020-10-27 05:16:33,819 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:34,414 INFO L93 Difference]: Finished difference Result 390 states and 588 transitions. [2020-10-27 05:16:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:16:34,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 05:16:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:34,420 INFO L225 Difference]: With dead ends: 390 [2020-10-27 05:16:34,420 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 05:16:34,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:16:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 05:16:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2020-10-27 05:16:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 05:16:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 281 transitions. [2020-10-27 05:16:34,458 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 281 transitions. Word has length 55 [2020-10-27 05:16:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:34,458 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 281 transitions. [2020-10-27 05:16:34,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 281 transitions. [2020-10-27 05:16:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:16:34,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:34,460 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] [2020-10-27 05:16:34,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:16:34,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:34,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1305816760, now seen corresponding path program 1 times [2020-10-27 05:16:34,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:34,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445179143] [2020-10-27 05:16:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:34,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:34,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:36,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:36,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:16:36,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:16:36,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1600 [2020-10-27 05:16:36,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:16:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:16:36,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:36,278 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:36,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:36,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:36,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:36,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:36,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:36,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:16:36,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:36,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:36,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:36,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:36,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:36,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445179143] [2020-10-27 05:16:36,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:36,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:16:36,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190633382] [2020-10-27 05:16:36,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:16:36,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:36,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:16:36,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:16:36,334 INFO L87 Difference]: Start difference. First operand 192 states and 281 transitions. Second operand 4 states. [2020-10-27 05:16:36,544 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:16:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:36,884 INFO L93 Difference]: Finished difference Result 476 states and 720 transitions. [2020-10-27 05:16:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:16:36,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 05:16:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:36,889 INFO L225 Difference]: With dead ends: 476 [2020-10-27 05:16:36,889 INFO L226 Difference]: Without dead ends: 321 [2020-10-27 05:16:36,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:16:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-27 05:16:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-10-27 05:16:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-27 05:16:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 469 transitions. [2020-10-27 05:16:36,960 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 469 transitions. Word has length 55 [2020-10-27 05:16:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:36,963 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 469 transitions. [2020-10-27 05:16:36,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:16:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 469 transitions. [2020-10-27 05:16:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:16:36,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:36,973 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] [2020-10-27 05:16:36,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:16:36,973 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash -684287127, now seen corresponding path program 1 times [2020-10-27 05:16:36,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:36,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450467285] [2020-10-27 05:16:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:37,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:37,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:38,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:38,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:16:38,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:16:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1669 [2020-10-27 05:16:38,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:38,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:16:38,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:16:38,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:38,947 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:38,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:38,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:38,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:38,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:38,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:38,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:16:38,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:38,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:38,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:38,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:38,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:38,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450467285] [2020-10-27 05:16:38,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:38,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:16:38,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345838896] [2020-10-27 05:16:39,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:39,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:39,002 INFO L87 Difference]: Start difference. First operand 316 states and 469 transitions. Second operand 7 states. [2020-10-27 05:16:39,229 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:16:39,761 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:16:39,906 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:16:40,140 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:16:40,297 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:16:40,451 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:16:40,705 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:16:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:40,724 INFO L93 Difference]: Finished difference Result 1023 states and 1544 transitions. [2020-10-27 05:16:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:16:40,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 05:16:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:40,730 INFO L225 Difference]: With dead ends: 1023 [2020-10-27 05:16:40,730 INFO L226 Difference]: Without dead ends: 833 [2020-10-27 05:16:40,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:16:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2020-10-27 05:16:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 316. [2020-10-27 05:16:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-27 05:16:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 467 transitions. [2020-10-27 05:16:40,776 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 467 transitions. Word has length 55 [2020-10-27 05:16:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:40,776 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 467 transitions. [2020-10-27 05:16:40,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 467 transitions. [2020-10-27 05:16:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:16:40,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:40,778 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] [2020-10-27 05:16:40,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:16:40,778 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1812006024, now seen corresponding path program 1 times [2020-10-27 05:16:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:40,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529299763] [2020-10-27 05:16:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:40,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:40,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:40,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:41,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:44,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:44,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:16:44,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:16:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4041 [2020-10-27 05:16:44,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:16:44,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:45,089 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:45,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:45,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:45,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:45,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:45,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:16:45,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:45,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:45,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:45,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:45,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529299763] [2020-10-27 05:16:45,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:45,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:16:45,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907685887] [2020-10-27 05:16:45,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:45,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:45,175 INFO L87 Difference]: Start difference. First operand 316 states and 467 transitions. Second operand 7 states. [2020-10-27 05:16:45,351 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:45,894 INFO L93 Difference]: Finished difference Result 722 states and 1078 transitions. [2020-10-27 05:16:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:16:45,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 05:16:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:45,899 INFO L225 Difference]: With dead ends: 722 [2020-10-27 05:16:45,899 INFO L226 Difference]: Without dead ends: 508 [2020-10-27 05:16:45,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:16:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-27 05:16:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 308. [2020-10-27 05:16:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-27 05:16:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 447 transitions. [2020-10-27 05:16:45,944 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 447 transitions. Word has length 55 [2020-10-27 05:16:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:45,945 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 447 transitions. [2020-10-27 05:16:45,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 447 transitions. [2020-10-27 05:16:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:16:45,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:45,946 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] [2020-10-27 05:16:45,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:16:45,947 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -475406850, now seen corresponding path program 1 times [2020-10-27 05:16:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:45,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096349066] [2020-10-27 05:16:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:46,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:49,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:49,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:16:49,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:16:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3758 [2020-10-27 05:16:49,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:16:49,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:50,029 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:50,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:50,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:50,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:50,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:50,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:50,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:16:50,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:50,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:50,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:50,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:50,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:50,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096349066] [2020-10-27 05:16:50,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:50,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:16:50,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53779677] [2020-10-27 05:16:50,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:50,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:50,117 INFO L87 Difference]: Start difference. First operand 308 states and 447 transitions. Second operand 7 states. [2020-10-27 05:16:50,354 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:50,868 INFO L93 Difference]: Finished difference Result 774 states and 1150 transitions. [2020-10-27 05:16:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:16:50,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 05:16:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:50,871 INFO L225 Difference]: With dead ends: 774 [2020-10-27 05:16:50,871 INFO L226 Difference]: Without dead ends: 530 [2020-10-27 05:16:50,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:16:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-27 05:16:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 290. [2020-10-27 05:16:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 05:16:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 416 transitions. [2020-10-27 05:16:50,948 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 416 transitions. Word has length 55 [2020-10-27 05:16:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:50,950 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 416 transitions. [2020-10-27 05:16:50,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 416 transitions. [2020-10-27 05:16:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:16:50,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:50,951 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] [2020-10-27 05:16:50,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:16:50,951 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash 752482481, now seen corresponding path program 1 times [2020-10-27 05:16:50,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:50,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661910604] [2020-10-27 05:16:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:50,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:51,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:55,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:55,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:16:55,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:16:55,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:16:55,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:55,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:16:55,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:55,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:16:55,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:56,244 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:56,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:56,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:56,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:56,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:56,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:56,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:16:56,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:56,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:56,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:56,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:56,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:16:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:56,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661910604] [2020-10-27 05:16:56,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:56,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:16:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805174780] [2020-10-27 05:16:56,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:16:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:16:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:16:56,321 INFO L87 Difference]: Start difference. First operand 290 states and 416 transitions. Second operand 7 states. [2020-10-27 05:16:56,513 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:57,047 INFO L93 Difference]: Finished difference Result 562 states and 834 transitions. [2020-10-27 05:16:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:16:57,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 05:16:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:57,051 INFO L225 Difference]: With dead ends: 562 [2020-10-27 05:16:57,051 INFO L226 Difference]: Without dead ends: 417 [2020-10-27 05:16:57,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:16:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-27 05:16:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 268. [2020-10-27 05:16:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-27 05:16:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 384 transitions. [2020-10-27 05:16:57,099 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 384 transitions. Word has length 56 [2020-10-27 05:16:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:57,100 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 384 transitions. [2020-10-27 05:16:57,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:16:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 384 transitions. [2020-10-27 05:16:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:16:57,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:57,101 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] [2020-10-27 05:16:57,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:16:57,101 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -924376843, now seen corresponding path program 1 times [2020-10-27 05:16:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:57,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398593975] [2020-10-27 05:16:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:57,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:58,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:59,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:59,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2398 [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:16:59,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:59,732 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:16:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:59,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:59,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:59,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:59,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:16:59,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:16:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:16:59,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398593975] [2020-10-27 05:16:59,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:59,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:16:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32651317] [2020-10-27 05:16:59,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:16:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:16:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:16:59,777 INFO L87 Difference]: Start difference. First operand 268 states and 384 transitions. Second operand 5 states. [2020-10-27 05:16:59,989 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:00,473 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:17:00,655 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:17:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:00,849 INFO L93 Difference]: Finished difference Result 476 states and 701 transitions. [2020-10-27 05:17:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:17:00,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-27 05:17:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:00,852 INFO L225 Difference]: With dead ends: 476 [2020-10-27 05:17:00,852 INFO L226 Difference]: Without dead ends: 373 [2020-10-27 05:17:00,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-27 05:17:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 365. [2020-10-27 05:17:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 05:17:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 531 transitions. [2020-10-27 05:17:00,907 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 531 transitions. Word has length 56 [2020-10-27 05:17:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:00,907 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 531 transitions. [2020-10-27 05:17:00,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:17:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 531 transitions. [2020-10-27 05:17:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:17:00,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:00,908 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] [2020-10-27 05:17:00,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:17:00,909 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 202603403, now seen corresponding path program 1 times [2020-10-27 05:17:00,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:00,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832795013] [2020-10-27 05:17:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:01,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:01,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:17:01,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:17:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-27 05:17:01,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:17:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:17:01,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:01,770 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:01,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:01,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:01,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:01,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:01,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:01,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:17:01,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:01,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:01,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832795013] [2020-10-27 05:17:01,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:01,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:17:01,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489423720] [2020-10-27 05:17:01,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:17:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:17:01,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:17:01,805 INFO L87 Difference]: Start difference. First operand 365 states and 531 transitions. Second operand 4 states. [2020-10-27 05:17:01,969 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:17:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:02,415 INFO L93 Difference]: Finished difference Result 913 states and 1357 transitions. [2020-10-27 05:17:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:17:02,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 05:17:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:02,420 INFO L225 Difference]: With dead ends: 913 [2020-10-27 05:17:02,420 INFO L226 Difference]: Without dead ends: 600 [2020-10-27 05:17:02,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:17:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-10-27 05:17:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 597. [2020-10-27 05:17:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-27 05:17:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 876 transitions. [2020-10-27 05:17:02,508 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 876 transitions. Word has length 56 [2020-10-27 05:17:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:02,508 INFO L481 AbstractCegarLoop]: Abstraction has 597 states and 876 transitions. [2020-10-27 05:17:02,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:17:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 876 transitions. [2020-10-27 05:17:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:17:02,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:02,509 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] [2020-10-27 05:17:02,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:17:02,510 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1181658993, now seen corresponding path program 1 times [2020-10-27 05:17:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521853673] [2020-10-27 05:17:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:02,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:02,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:02,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:17:02,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:17:02,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-27 05:17:02,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:17:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 05:17:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:17:03,051 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:03,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:03,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:03,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:03,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:03,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:17:03,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:03,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521853673] [2020-10-27 05:17:03,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:03,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:17:03,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805657262] [2020-10-27 05:17:03,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:17:03,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:03,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:17:03,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:17:03,092 INFO L87 Difference]: Start difference. First operand 597 states and 876 transitions. Second operand 4 states. [2020-10-27 05:17:03,260 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:17:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:03,799 INFO L93 Difference]: Finished difference Result 1553 states and 2304 transitions. [2020-10-27 05:17:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:17:03,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-27 05:17:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:03,808 INFO L225 Difference]: With dead ends: 1553 [2020-10-27 05:17:03,809 INFO L226 Difference]: Without dead ends: 1020 [2020-10-27 05:17:03,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:17:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-10-27 05:17:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1017. [2020-10-27 05:17:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-10-27 05:17:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1488 transitions. [2020-10-27 05:17:03,981 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1488 transitions. Word has length 57 [2020-10-27 05:17:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:03,981 INFO L481 AbstractCegarLoop]: Abstraction has 1017 states and 1488 transitions. [2020-10-27 05:17:03,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:17:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1488 transitions. [2020-10-27 05:17:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:17:03,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:03,982 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] [2020-10-27 05:17:03,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:17:03,983 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash 770309747, now seen corresponding path program 1 times [2020-10-27 05:17:03,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:03,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509933046] [2020-10-27 05:17:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:04,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:04,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:04,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:04,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:17:04,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:17:04,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-27 05:17:04,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:17:04,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:04,741 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:04,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:04,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:04,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:17:04,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:04,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:04,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509933046] [2020-10-27 05:17:04,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:04,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:04,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366925764] [2020-10-27 05:17:04,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:04,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:04,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:04,786 INFO L87 Difference]: Start difference. First operand 1017 states and 1488 transitions. Second operand 6 states. [2020-10-27 05:17:04,995 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:17:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:05,430 INFO L93 Difference]: Finished difference Result 1974 states and 2906 transitions. [2020-10-27 05:17:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:17:05,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-27 05:17:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:05,437 INFO L225 Difference]: With dead ends: 1974 [2020-10-27 05:17:05,437 INFO L226 Difference]: Without dead ends: 1017 [2020-10-27 05:17:05,440 INFO L677 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 [2020-10-27 05:17:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2020-10-27 05:17:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1017. [2020-10-27 05:17:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-10-27 05:17:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1474 transitions. [2020-10-27 05:17:05,592 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1474 transitions. Word has length 58 [2020-10-27 05:17:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:05,592 INFO L481 AbstractCegarLoop]: Abstraction has 1017 states and 1474 transitions. [2020-10-27 05:17:05,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1474 transitions. [2020-10-27 05:17:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:17:05,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:05,593 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] [2020-10-27 05:17:05,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:17:05,593 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1635842136, now seen corresponding path program 1 times [2020-10-27 05:17:05,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:05,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347385210] [2020-10-27 05:17:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:05,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:05,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:17:05,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:17:05,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 05:17:05,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:17:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 05:17:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:05,985 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:05,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:05,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:05,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:05,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:05,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:05,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:17:05,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:06,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:06,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:06,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347385210] [2020-10-27 05:17:06,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:06,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:17:06,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999741104] [2020-10-27 05:17:06,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:17:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:17:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:17:06,013 INFO L87 Difference]: Start difference. First operand 1017 states and 1474 transitions. Second operand 4 states. [2020-10-27 05:17:06,188 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:17:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:06,788 INFO L93 Difference]: Finished difference Result 2719 states and 3950 transitions. [2020-10-27 05:17:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:17:06,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-27 05:17:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:06,797 INFO L225 Difference]: With dead ends: 2719 [2020-10-27 05:17:06,797 INFO L226 Difference]: Without dead ends: 1770 [2020-10-27 05:17:06,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:17:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2020-10-27 05:17:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1734. [2020-10-27 05:17:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2020-10-27 05:17:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2486 transitions. [2020-10-27 05:17:07,033 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2486 transitions. Word has length 58 [2020-10-27 05:17:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:07,033 INFO L481 AbstractCegarLoop]: Abstraction has 1734 states and 2486 transitions. [2020-10-27 05:17:07,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:17:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2486 transitions. [2020-10-27 05:17:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:17:07,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:07,034 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] [2020-10-27 05:17:07,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:17:07,035 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:07,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1965916165, now seen corresponding path program 1 times [2020-10-27 05:17:07,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:07,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867615970] [2020-10-27 05:17:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:07,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:07,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:07,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:17:07,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:17:07,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 05:17:07,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:07,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:07,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:17:07,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:07,508 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:07,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:07,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:07,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867615970] [2020-10-27 05:17:07,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:07,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:07,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145144966] [2020-10-27 05:17:07,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:07,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:07,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:07,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:07,545 INFO L87 Difference]: Start difference. First operand 1734 states and 2486 transitions. Second operand 6 states. [2020-10-27 05:17:07,741 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:08,306 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:17:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:08,592 INFO L93 Difference]: Finished difference Result 5108 states and 7338 transitions. [2020-10-27 05:17:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:17:08,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-27 05:17:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:08,608 INFO L225 Difference]: With dead ends: 5108 [2020-10-27 05:17:08,608 INFO L226 Difference]: Without dead ends: 3409 [2020-10-27 05:17:08,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2020-10-27 05:17:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3406. [2020-10-27 05:17:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3406 states. [2020-10-27 05:17:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 4862 transitions. [2020-10-27 05:17:09,194 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 4862 transitions. Word has length 59 [2020-10-27 05:17:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:09,194 INFO L481 AbstractCegarLoop]: Abstraction has 3406 states and 4862 transitions. [2020-10-27 05:17:09,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 4862 transitions. [2020-10-27 05:17:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:17:09,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:09,195 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] [2020-10-27 05:17:09,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:17:09,195 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1557187478, now seen corresponding path program 1 times [2020-10-27 05:17:09,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:09,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261885977] [2020-10-27 05:17:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:09,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:17:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 05:17:09,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:17:09,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:09,490 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:09,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:09,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:09,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:17:09,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:09,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261885977] [2020-10-27 05:17:09,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:09,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:09,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089532784] [2020-10-27 05:17:09,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:17:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:17:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:17:09,512 INFO L87 Difference]: Start difference. First operand 3406 states and 4862 transitions. Second operand 5 states. [2020-10-27 05:17:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:10,533 INFO L93 Difference]: Finished difference Result 5375 states and 7669 transitions. [2020-10-27 05:17:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:17:10,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 05:17:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:10,554 INFO L225 Difference]: With dead ends: 5375 [2020-10-27 05:17:10,555 INFO L226 Difference]: Without dead ends: 5372 [2020-10-27 05:17:10,557 INFO L677 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 [2020-10-27 05:17:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5372 states. [2020-10-27 05:17:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5372 to 3470. [2020-10-27 05:17:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2020-10-27 05:17:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 4894 transitions. [2020-10-27 05:17:11,182 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 4894 transitions. Word has length 59 [2020-10-27 05:17:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:11,183 INFO L481 AbstractCegarLoop]: Abstraction has 3470 states and 4894 transitions. [2020-10-27 05:17:11,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:17:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 4894 transitions. [2020-10-27 05:17:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:17:11,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:11,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:11,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:17:11,186 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2063567525, now seen corresponding path program 1 times [2020-10-27 05:17:11,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:11,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124863203] [2020-10-27 05:17:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:11,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:12,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:16,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:17:16,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:17:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:17:16,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:17:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:17:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:16,533 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:16,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:16,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:16,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:16,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 05:17:16,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:16,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:16,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124863203] [2020-10-27 05:17:16,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:17:16,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:17:16,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161751340] [2020-10-27 05:17:16,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:17:16,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:17:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:17:16,644 INFO L87 Difference]: Start difference. First operand 3470 states and 4894 transitions. Second operand 11 states. [2020-10-27 05:17:16,915 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:17:18,683 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:17:18,948 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:17:19,122 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:21,068 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:17:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:22,175 INFO L93 Difference]: Finished difference Result 25456 states and 35548 transitions. [2020-10-27 05:17:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:17:22,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-27 05:17:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:22,246 INFO L225 Difference]: With dead ends: 25456 [2020-10-27 05:17:22,246 INFO L226 Difference]: Without dead ends: 22021 [2020-10-27 05:17:22,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:17:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22021 states. [2020-10-27 05:17:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22021 to 8264. [2020-10-27 05:17:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8264 states. [2020-10-27 05:17:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 11552 transitions. [2020-10-27 05:17:23,776 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 11552 transitions. Word has length 82 [2020-10-27 05:17:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:23,776 INFO L481 AbstractCegarLoop]: Abstraction has 8264 states and 11552 transitions. [2020-10-27 05:17:23,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:17:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 11552 transitions. [2020-10-27 05:17:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:17:23,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:23,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:23,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:17:23,780 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1327465643, now seen corresponding path program 1 times [2020-10-27 05:17:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:23,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486117450] [2020-10-27 05:17:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:23,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:23,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:23,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:24,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:28,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:28,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:17:28,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:17:28,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:17:28,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:28,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:17:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:17:28,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:29,088 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:29,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:29,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:29,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:29,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:29,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:29,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:17:29,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:29,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:29,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:29,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:29,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:29,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486117450] [2020-10-27 05:17:29,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:17:29,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:17:29,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341077074] [2020-10-27 05:17:29,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:17:29,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:17:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:17:29,132 INFO L87 Difference]: Start difference. First operand 8264 states and 11552 transitions. Second operand 11 states. [2020-10-27 05:17:29,357 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:17:31,765 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:17:32,014 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:32,286 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:17:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:39,163 INFO L93 Difference]: Finished difference Result 59324 states and 82377 transitions. [2020-10-27 05:17:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:17:39,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-27 05:17:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:39,289 INFO L225 Difference]: With dead ends: 59324 [2020-10-27 05:17:39,289 INFO L226 Difference]: Without dead ends: 51095 [2020-10-27 05:17:39,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:17:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51095 states. [2020-10-27 05:17:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51095 to 19762. [2020-10-27 05:17:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19762 states. [2020-10-27 05:17:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19762 states to 19762 states and 27330 transitions. [2020-10-27 05:17:43,115 INFO L78 Accepts]: Start accepts. Automaton has 19762 states and 27330 transitions. Word has length 82 [2020-10-27 05:17:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:43,115 INFO L481 AbstractCegarLoop]: Abstraction has 19762 states and 27330 transitions. [2020-10-27 05:17:43,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:17:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19762 states and 27330 transitions. [2020-10-27 05:17:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:17:43,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:43,123 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:17:43,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:17:43,123 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:43,124 INFO L82 PathProgramCache]: Analyzing trace with hash 560713950, now seen corresponding path program 1 times [2020-10-27 05:17:43,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:43,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529472731] [2020-10-27 05:17:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:43,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:43,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:43,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:48,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:17:48,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:48,619 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:17:48,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:48,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:48,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:48,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:17:48,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:48,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:48,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529472731] [2020-10-27 05:17:48,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:17:48,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 05:17:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737555645] [2020-10-27 05:17:48,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:17:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:48,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:17:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:17:48,676 INFO L87 Difference]: Start difference. First operand 19762 states and 27330 transitions. Second operand 16 states. [2020-10-27 05:17:49,203 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 162 [2020-10-27 05:17:49,983 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 05:17:51,951 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 05:17:54,315 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 150 [2020-10-27 05:17:54,529 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:54,874 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:17:55,310 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2020-10-27 05:17:58,767 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-27 05:18:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:03,421 INFO L93 Difference]: Finished difference Result 70715 states and 96891 transitions. [2020-10-27 05:18:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 05:18:03,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2020-10-27 05:18:03,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:03,534 INFO L225 Difference]: With dead ends: 70715 [2020-10-27 05:18:03,534 INFO L226 Difference]: Without dead ends: 50988 [2020-10-27 05:18:03,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=587, Invalid=2383, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 05:18:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50988 states. [2020-10-27 05:18:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50988 to 33300. [2020-10-27 05:18:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33300 states. [2020-10-27 05:18:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33300 states to 33300 states and 45932 transitions. [2020-10-27 05:18:09,423 INFO L78 Accepts]: Start accepts. Automaton has 33300 states and 45932 transitions. Word has length 83 [2020-10-27 05:18:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:09,424 INFO L481 AbstractCegarLoop]: Abstraction has 33300 states and 45932 transitions. [2020-10-27 05:18:09,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:18:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 33300 states and 45932 transitions. [2020-10-27 05:18:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:18:09,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:09,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:09,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:18:09,434 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1425794622, now seen corresponding path program 1 times [2020-10-27 05:18:09,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:09,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983555314] [2020-10-27 05:18:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:12,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:12,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:12,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:14,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:18:14,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:18:14,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:18:14,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:18:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:18:14,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:14,794 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:18:14,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:14,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:14,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:14,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:14,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983555314] [2020-10-27 05:18:14,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:18:14,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:18:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946375487] [2020-10-27 05:18:14,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:18:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:18:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:18:14,843 INFO L87 Difference]: Start difference. First operand 33300 states and 45932 transitions. Second operand 11 states. [2020-10-27 05:18:15,152 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:18:18,299 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:18:18,491 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:18:18,708 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:18:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:34,729 INFO L93 Difference]: Finished difference Result 128506 states and 176003 transitions. [2020-10-27 05:18:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:18:34,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-27 05:18:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:34,895 INFO L225 Difference]: With dead ends: 128506 [2020-10-27 05:18:34,896 INFO L226 Difference]: Without dead ends: 95241 [2020-10-27 05:18:34,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 05:18:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95241 states. [2020-10-27 05:18:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95241 to 47692. [2020-10-27 05:18:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47692 states. [2020-10-27 05:18:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47692 states to 47692 states and 65704 transitions. [2020-10-27 05:18:44,563 INFO L78 Accepts]: Start accepts. Automaton has 47692 states and 65704 transitions. Word has length 83 [2020-10-27 05:18:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:44,563 INFO L481 AbstractCegarLoop]: Abstraction has 47692 states and 65704 transitions. [2020-10-27 05:18:44,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:18:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 47692 states and 65704 transitions. [2020-10-27 05:18:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:18:44,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:44,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:44,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:18:44,577 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:44,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2023040391, now seen corresponding path program 1 times [2020-10-27 05:18:44,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:44,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632413801] [2020-10-27 05:18:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:44,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:44,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:45,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:45,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:48,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:48,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:18:48,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:18:48,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3414 [2020-10-27 05:18:48,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:48,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:18:48,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:18:48,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:18:48,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:48,429 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:18:48,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:48,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:48,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:48,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:18:48,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:18:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:18:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:48,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632413801] [2020-10-27 05:18:48,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:18:48,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:18:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713591094] [2020-10-27 05:18:48,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:18:48,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:48,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:18:48,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:18:48,465 INFO L87 Difference]: Start difference. First operand 47692 states and 65704 transitions. Second operand 10 states. [2020-10-27 05:18:48,651 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:18:51,717 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:18:52,141 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:19:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:10,014 INFO L93 Difference]: Finished difference Result 142602 states and 195327 transitions. [2020-10-27 05:19:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:19:10,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-27 05:19:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:10,128 INFO L225 Difference]: With dead ends: 142602 [2020-10-27 05:19:10,128 INFO L226 Difference]: Without dead ends: 94945 [2020-10-27 05:19:10,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:19:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94945 states. [2020-10-27 05:19:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94945 to 48380. [2020-10-27 05:19:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48380 states. [2020-10-27 05:19:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48380 states to 48380 states and 66736 transitions. [2020-10-27 05:19:20,715 INFO L78 Accepts]: Start accepts. Automaton has 48380 states and 66736 transitions. Word has length 84 [2020-10-27 05:19:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:20,716 INFO L481 AbstractCegarLoop]: Abstraction has 48380 states and 66736 transitions. [2020-10-27 05:19:20,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:19:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48380 states and 66736 transitions. [2020-10-27 05:19:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:19:20,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:20,727 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:19:20,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:19:20,727 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1538288004, now seen corresponding path program 1 times [2020-10-27 05:19:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:20,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917480293] [2020-10-27 05:19:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:20,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:19:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:19:23,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:19:23,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:23,641 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 05:19:23,846 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:19:23,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:23,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:23,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:23,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:23,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:19:23,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:19:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:19:23,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917480293] [2020-10-27 05:19:23,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:19:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:19:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716665743] [2020-10-27 05:19:23,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:19:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:19:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:19:23,882 INFO L87 Difference]: Start difference. First operand 48380 states and 66736 transitions. Second operand 10 states. [2020-10-27 05:19:24,094 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:19:26,850 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-27 05:19:28,365 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:19:29,000 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:19:29,201 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:19:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:48,289 INFO L93 Difference]: Finished difference Result 141506 states and 194187 transitions. [2020-10-27 05:19:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:19:48,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-27 05:19:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:48,444 INFO L225 Difference]: With dead ends: 141506 [2020-10-27 05:19:48,444 INFO L226 Difference]: Without dead ends: 93161 [2020-10-27 05:19:48,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:19:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93161 states.