/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:19,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:19,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:19,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:19,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:19,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:19,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:19,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:19,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:19,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:19,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:19,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:19,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:19,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:19,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:19,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:19,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:19,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:19,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:19,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:19,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:19,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:19,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:19,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:19,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:19,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:19,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:19,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:19,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:19,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:19,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:19,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:19,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:19,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:19,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:19,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:19,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:19,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:19,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:19,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:19,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:19,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:38:19,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:19,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:19,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:19,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:19,702 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:19,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:19,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:19,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:19,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:19,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:19,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:19,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:19,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:19,704 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:19,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:19,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:19,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:19,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:19,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:19,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:19,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:19,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:19,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:19,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:19,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:19,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:19,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:19,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:19,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:19,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:38:20,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:20,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:20,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:20,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:20,054 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:20,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-10-13 04:38:20,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab44087ed/e7af829637e34d0392539cc925dda2b8/FLAG779be6260 [2020-10-13 04:38:20,598 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:20,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-10-13 04:38:20,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab44087ed/e7af829637e34d0392539cc925dda2b8/FLAG779be6260 [2020-10-13 04:38:21,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab44087ed/e7af829637e34d0392539cc925dda2b8 [2020-10-13 04:38:21,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:21,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:21,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:21,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:21,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:21,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21, skipping insertion in model container [2020-10-13 04:38:21,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:21,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:21,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:21,267 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:21,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:21,390 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:21,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21 WrapperNode [2020-10-13 04:38:21,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:21,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:21,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:21,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:21,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... [2020-10-13 04:38:21,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:21,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:21,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:21,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:21,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:21,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:21,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:21,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:21,503 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-10-13 04:38:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-10-13 04:38:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:38:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-10-13 04:38:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-10-13 04:38:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:38:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:21,931 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:21,931 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-13 04:38:21,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:21 BoogieIcfgContainer [2020-10-13 04:38:21,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:21,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:21,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:21,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:21,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:21" (1/3) ... [2020-10-13 04:38:21,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a4092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:21, skipping insertion in model container [2020-10-13 04:38:21,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:21" (2/3) ... [2020-10-13 04:38:21,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a4092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:21, skipping insertion in model container [2020-10-13 04:38:21,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:21" (3/3) ... [2020-10-13 04:38:21,945 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-10-13 04:38:21,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:21,963 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:21,978 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:22,002 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:22,002 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:22,002 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:22,002 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:22,003 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:22,003 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:22,003 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:22,003 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-10-13 04:38:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:38:22,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:22,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:22,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-10-13 04:38:22,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:22,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851997932] [2020-10-13 04:38:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:38:22,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:22,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-13 04:38:22,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:22,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:22,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:22,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:38:22,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:22,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:22,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851997932] [2020-10-13 04:38:22,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:22,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:22,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074555027] [2020-10-13 04:38:22,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:22,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:22,552 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-10-13 04:38:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:22,880 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-10-13 04:38:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:22,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 04:38:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:22,895 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:38:22,895 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:38:22,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:38:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-10-13 04:38:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:38:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-10-13 04:38:22,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-10-13 04:38:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:22,962 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-10-13 04:38:22,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-10-13 04:38:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:38:22,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:22,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:22,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:22,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-10-13 04:38:22,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:22,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108012663] [2020-10-13 04:38:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:38:23,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-13 04:38:23,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:23,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:23,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:23,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:38:23,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:23,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:23,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108012663] [2020-10-13 04:38:23,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:23,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:23,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677433604] [2020-10-13 04:38:23,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:23,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:23,305 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-10-13 04:38:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:23,609 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-10-13 04:38:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:23,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 04:38:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:23,612 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:38:23,613 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 04:38:23,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 04:38:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-10-13 04:38:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 04:38:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-10-13 04:38:23,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-10-13 04:38:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:23,628 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-10-13 04:38:23,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-10-13 04:38:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:38:23,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:23,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:23,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:23,630 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-10-13 04:38:23,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:23,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897434984] [2020-10-13 04:38:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:38:23,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:23,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-13 04:38:23,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:38:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:23,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:23,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:23,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:23,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:23,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:23,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:23,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897434984] [2020-10-13 04:38:23,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:23,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:23,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091927468] [2020-10-13 04:38:23,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:23,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:23,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:23,870 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-10-13 04:38:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:24,186 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-10-13 04:38:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:24,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 04:38:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:24,190 INFO L225 Difference]: With dead ends: 203 [2020-10-13 04:38:24,201 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 04:38:24,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 04:38:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-10-13 04:38:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:38:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-13 04:38:24,215 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-10-13 04:38:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:24,215 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-13 04:38:24,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-13 04:38:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:38:24,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:24,217 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:24,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:24,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-10-13 04:38:24,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:24,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964721694] [2020-10-13 04:38:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:24,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:38:24,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-13 04:38:24,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:38:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:24,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:24,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:24,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:24,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:24,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:24,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964721694] [2020-10-13 04:38:24,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:24,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:38:24,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686707648] [2020-10-13 04:38:24,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:38:24,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:38:24,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:24,442 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-10-13 04:38:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:24,796 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-10-13 04:38:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:24,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 04:38:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:24,799 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:38:24,800 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 04:38:24,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 04:38:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-10-13 04:38:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 04:38:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 04:38:24,813 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-10-13 04:38:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:24,813 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 04:38:24,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:38:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 04:38:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:38:24,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:24,814 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:24,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:24,815 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-10-13 04:38:24,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:24,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187141052] [2020-10-13 04:38:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:38:25,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:25,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-13 04:38:25,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:38:25,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:25,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:25,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:25,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:25,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:25,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:25,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:25,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:25,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:25,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187141052] [2020-10-13 04:38:25,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:25,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:38:25,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670593899] [2020-10-13 04:38:25,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:38:25,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:25,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:38:25,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:25,093 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 8 states. [2020-10-13 04:38:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:25,484 INFO L93 Difference]: Finished difference Result 269 states and 360 transitions. [2020-10-13 04:38:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:38:25,485 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 04:38:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:25,487 INFO L225 Difference]: With dead ends: 269 [2020-10-13 04:38:25,487 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 04:38:25,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 04:38:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 65. [2020-10-13 04:38:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 04:38:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-13 04:38:25,500 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 22 [2020-10-13 04:38:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:25,500 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-13 04:38:25,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:38:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-13 04:38:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:25,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:25,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:25,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:25,502 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1875478904, now seen corresponding path program 5 times [2020-10-13 04:38:25,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:25,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895850405] [2020-10-13 04:38:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:25,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:25,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-13 04:38:25,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:38:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:25,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:25,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:25,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:25,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:25,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:25,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895850405] [2020-10-13 04:38:25,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:25,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:38:25,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566239717] [2020-10-13 04:38:25,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:38:25,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:38:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:25,827 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-10-13 04:38:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:26,272 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2020-10-13 04:38:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:38:26,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 04:38:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:26,275 INFO L225 Difference]: With dead ends: 302 [2020-10-13 04:38:26,275 INFO L226 Difference]: Without dead ends: 254 [2020-10-13 04:38:26,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-13 04:38:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 67. [2020-10-13 04:38:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:38:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-13 04:38:26,287 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 24 [2020-10-13 04:38:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:26,287 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-13 04:38:26,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:38:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-13 04:38:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:38:26,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:26,288 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:26,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:26,289 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:26,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1964813670, now seen corresponding path program 6 times [2020-10-13 04:38:26,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:26,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420384303] [2020-10-13 04:38:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:38:26,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-13 04:38:26,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:26,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:26,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:26,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:26,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:26,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420384303] [2020-10-13 04:38:26,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:26,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:26,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349865030] [2020-10-13 04:38:26,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:26,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:26,669 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 10 states. [2020-10-13 04:38:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:27,118 INFO L93 Difference]: Finished difference Result 335 states and 452 transitions. [2020-10-13 04:38:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:38:27,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 04:38:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:27,121 INFO L225 Difference]: With dead ends: 335 [2020-10-13 04:38:27,121 INFO L226 Difference]: Without dead ends: 287 [2020-10-13 04:38:27,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-13 04:38:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 69. [2020-10-13 04:38:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 04:38:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-13 04:38:27,132 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 26 [2020-10-13 04:38:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:27,132 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-13 04:38:27,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-13 04:38:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:27,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:27,134 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:27,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:27,134 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1185897276, now seen corresponding path program 7 times [2020-10-13 04:38:27,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:27,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496713578] [2020-10-13 04:38:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:27,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-13 04:38:27,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:38:27,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:27,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:38:27,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:27,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:27,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:27,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:27,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496713578] [2020-10-13 04:38:27,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:27,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:38:27,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554854753] [2020-10-13 04:38:27,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:38:27,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:27,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:38:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:27,510 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 11 states. [2020-10-13 04:38:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:28,058 INFO L93 Difference]: Finished difference Result 368 states and 498 transitions. [2020-10-13 04:38:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:28,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 04:38:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:28,062 INFO L225 Difference]: With dead ends: 368 [2020-10-13 04:38:28,062 INFO L226 Difference]: Without dead ends: 320 [2020-10-13 04:38:28,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-13 04:38:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 71. [2020-10-13 04:38:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:38:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-13 04:38:28,072 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 28 [2020-10-13 04:38:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:28,073 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-13 04:38:28,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:38:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-13 04:38:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:38:28,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:28,074 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:28,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:28,075 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1067172702, now seen corresponding path program 8 times [2020-10-13 04:38:28,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:28,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400273972] [2020-10-13 04:38:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:38:28,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-13 04:38:28,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:38:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:38:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:28,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:28,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:28,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:28,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:28,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:28,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:28,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400273972] [2020-10-13 04:38:28,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:28,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:38:28,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531838527] [2020-10-13 04:38:28,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:38:28,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:38:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:28,539 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 12 states. [2020-10-13 04:38:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:29,137 INFO L93 Difference]: Finished difference Result 401 states and 544 transitions. [2020-10-13 04:38:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:29,138 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 04:38:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:29,140 INFO L225 Difference]: With dead ends: 401 [2020-10-13 04:38:29,141 INFO L226 Difference]: Without dead ends: 353 [2020-10-13 04:38:29,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-13 04:38:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 73. [2020-10-13 04:38:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 04:38:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-13 04:38:29,149 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 30 [2020-10-13 04:38:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:29,150 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-13 04:38:29,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:38:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-13 04:38:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:29,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:29,151 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:29,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:38:29,152 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1357993216, now seen corresponding path program 9 times [2020-10-13 04:38:29,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:29,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379900192] [2020-10-13 04:38:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:29,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:29,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:29,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-13 04:38:29,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:38:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:38:29,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:29,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:29,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:29,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:29,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:29,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:29,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379900192] [2020-10-13 04:38:29,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:29,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:38:29,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107020471] [2020-10-13 04:38:29,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:38:29,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:38:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:38:29,684 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 13 states. [2020-10-13 04:38:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:30,300 INFO L93 Difference]: Finished difference Result 434 states and 590 transitions. [2020-10-13 04:38:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:38:30,301 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 04:38:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:30,304 INFO L225 Difference]: With dead ends: 434 [2020-10-13 04:38:30,305 INFO L226 Difference]: Without dead ends: 386 [2020-10-13 04:38:30,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:38:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-13 04:38:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 75. [2020-10-13 04:38:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:38:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-13 04:38:30,313 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 32 [2020-10-13 04:38:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:30,314 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-13 04:38:30,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:38:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-13 04:38:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:38:30,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:30,316 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:30,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:38:30,316 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash 224801314, now seen corresponding path program 10 times [2020-10-13 04:38:30,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:30,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652287000] [2020-10-13 04:38:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:38:30,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-13 04:38:30,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:38:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:38:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:30,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:30,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:30,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:30,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652287000] [2020-10-13 04:38:30,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:30,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:38:30,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445424873] [2020-10-13 04:38:30,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:38:30,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:38:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:30,965 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 14 states. [2020-10-13 04:38:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:31,741 INFO L93 Difference]: Finished difference Result 467 states and 636 transitions. [2020-10-13 04:38:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:38:31,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-13 04:38:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:31,747 INFO L225 Difference]: With dead ends: 467 [2020-10-13 04:38:31,747 INFO L226 Difference]: Without dead ends: 419 [2020-10-13 04:38:31,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-13 04:38:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 77. [2020-10-13 04:38:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:38:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-13 04:38:31,759 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 34 [2020-10-13 04:38:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:31,760 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-13 04:38:31,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:38:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-13 04:38:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:38:31,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:31,761 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:31,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:38:31,762 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:31,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash 871921860, now seen corresponding path program 11 times [2020-10-13 04:38:31,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:31,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508592551] [2020-10-13 04:38:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:38:32,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:32,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-13 04:38:32,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:38:32,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:32,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:38:32,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:32,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:32,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:32,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:32,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:32,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:32,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:32,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:32,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508592551] [2020-10-13 04:38:32,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:32,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:38:32,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442260645] [2020-10-13 04:38:32,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:38:32,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:38:32,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:38:32,555 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 15 states. [2020-10-13 04:38:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:33,364 INFO L93 Difference]: Finished difference Result 500 states and 682 transitions. [2020-10-13 04:38:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:38:33,364 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-13 04:38:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:33,367 INFO L225 Difference]: With dead ends: 500 [2020-10-13 04:38:33,368 INFO L226 Difference]: Without dead ends: 452 [2020-10-13 04:38:33,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:38:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-13 04:38:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 79. [2020-10-13 04:38:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 04:38:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-10-13 04:38:33,377 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 36 [2020-10-13 04:38:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:33,377 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-10-13 04:38:33,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:38:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-10-13 04:38:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:38:33,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:33,379 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:33,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:38:33,379 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash -15491354, now seen corresponding path program 12 times [2020-10-13 04:38:33,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:33,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60415755] [2020-10-13 04:38:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:33,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:34,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:34,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:38:34,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:34,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-13 04:38:34,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:34,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:38:34,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:34,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:38:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:34,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:34,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:34,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:34,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:34,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:34,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:34,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:34,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:34,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:34,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:34,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60415755] [2020-10-13 04:38:34,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:34,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:38:34,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548633068] [2020-10-13 04:38:34,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:38:34,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:34,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:38:34,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:38:34,250 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 16 states. [2020-10-13 04:38:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:35,096 INFO L93 Difference]: Finished difference Result 533 states and 728 transitions. [2020-10-13 04:38:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:38:35,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-13 04:38:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:35,100 INFO L225 Difference]: With dead ends: 533 [2020-10-13 04:38:35,100 INFO L226 Difference]: Without dead ends: 485 [2020-10-13 04:38:35,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:38:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-13 04:38:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 81. [2020-10-13 04:38:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 04:38:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-10-13 04:38:35,112 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 38 [2020-10-13 04:38:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:35,112 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-10-13 04:38:35,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:38:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-10-13 04:38:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:38:35,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:35,113 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:35,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:38:35,114 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:35,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1878901896, now seen corresponding path program 13 times [2020-10-13 04:38:35,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:35,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854269959] [2020-10-13 04:38:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:35,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:38:35,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:35,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-13 04:38:35,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:38:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:38:35,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:36,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:36,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:36,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:36,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:36,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:36,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:36,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:36,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:36,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:36,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854269959] [2020-10-13 04:38:36,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:36,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:38:36,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328333225] [2020-10-13 04:38:36,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:38:36,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:38:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:36,028 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 17 states. [2020-10-13 04:38:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:36,969 INFO L93 Difference]: Finished difference Result 566 states and 774 transitions. [2020-10-13 04:38:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:38:36,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 04:38:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:36,973 INFO L225 Difference]: With dead ends: 566 [2020-10-13 04:38:36,974 INFO L226 Difference]: Without dead ends: 518 [2020-10-13 04:38:36,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-10-13 04:38:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 83. [2020-10-13 04:38:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:38:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-13 04:38:36,984 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 40 [2020-10-13 04:38:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:36,985 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-13 04:38:36,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:38:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-13 04:38:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:38:36,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:36,988 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:36,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:38:36,989 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1324681642, now seen corresponding path program 14 times [2020-10-13 04:38:36,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:36,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518822959] [2020-10-13 04:38:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:37,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:38:37,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:37,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-13 04:38:37,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:38:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:38:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:37,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:37,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:37,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:37,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:37,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:37,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518822959] [2020-10-13 04:38:37,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:38:37,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209453392] [2020-10-13 04:38:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:38:37,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:38:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:38:37,951 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 18 states. [2020-10-13 04:38:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:38,816 INFO L93 Difference]: Finished difference Result 599 states and 820 transitions. [2020-10-13 04:38:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:38:38,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-13 04:38:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:38,821 INFO L225 Difference]: With dead ends: 599 [2020-10-13 04:38:38,821 INFO L226 Difference]: Without dead ends: 551 [2020-10-13 04:38:38,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:38:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2020-10-13 04:38:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 85. [2020-10-13 04:38:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:38:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-13 04:38:38,832 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 42 [2020-10-13 04:38:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:38,833 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-13 04:38:38,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:38:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-13 04:38:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:38:38,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:38,834 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:38,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:38:38,834 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1294962252, now seen corresponding path program 15 times [2020-10-13 04:38:38,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:38,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119723733] [2020-10-13 04:38:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:38,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:38:39,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 04:38:39,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:38:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:38:39,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:39,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:39,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:39,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:39,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119723733] [2020-10-13 04:38:39,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:39,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:38:39,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245516860] [2020-10-13 04:38:39,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:38:39,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:38:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:38:39,891 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 19 states. [2020-10-13 04:38:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:40,949 INFO L93 Difference]: Finished difference Result 632 states and 866 transitions. [2020-10-13 04:38:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:38:40,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-13 04:38:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:40,953 INFO L225 Difference]: With dead ends: 632 [2020-10-13 04:38:40,953 INFO L226 Difference]: Without dead ends: 584 [2020-10-13 04:38:40,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:38:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-10-13 04:38:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 87. [2020-10-13 04:38:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:38:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-13 04:38:40,969 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 44 [2020-10-13 04:38:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:40,969 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-13 04:38:40,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:38:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-13 04:38:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:38:40,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:40,970 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:40,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:38:40,970 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1495567762, now seen corresponding path program 16 times [2020-10-13 04:38:40,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:40,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110868061] [2020-10-13 04:38:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:40,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:41,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:38:41,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:41,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-13 04:38:41,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:38:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:38:41,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:42,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:42,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:42,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:42,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:42,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:42,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:42,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:42,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:42,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:42,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110868061] [2020-10-13 04:38:42,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:42,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:38:42,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357165806] [2020-10-13 04:38:42,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:38:42,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:38:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:38:42,070 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 20 states. [2020-10-13 04:38:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:43,424 INFO L93 Difference]: Finished difference Result 665 states and 912 transitions. [2020-10-13 04:38:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:38:43,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-13 04:38:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:43,429 INFO L225 Difference]: With dead ends: 665 [2020-10-13 04:38:43,429 INFO L226 Difference]: Without dead ends: 617 [2020-10-13 04:38:43,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:38:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-10-13 04:38:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 89. [2020-10-13 04:38:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 04:38:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2020-10-13 04:38:43,442 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 46 [2020-10-13 04:38:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:43,442 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2020-10-13 04:38:43,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:38:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2020-10-13 04:38:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:38:43,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:43,443 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:43,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:38:43,443 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1159648784, now seen corresponding path program 17 times [2020-10-13 04:38:43,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:43,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760784024] [2020-10-13 04:38:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:38:44,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:44,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-13 04:38:44,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:38:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:38:44,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:44,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:44,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:44,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:44,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:44,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:44,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760784024] [2020-10-13 04:38:44,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:44,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:38:44,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173971290] [2020-10-13 04:38:44,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:38:44,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:38:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:38:44,592 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 21 states. [2020-10-13 04:38:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:45,957 INFO L93 Difference]: Finished difference Result 698 states and 958 transitions. [2020-10-13 04:38:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:38:45,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-13 04:38:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:45,962 INFO L225 Difference]: With dead ends: 698 [2020-10-13 04:38:45,962 INFO L226 Difference]: Without dead ends: 650 [2020-10-13 04:38:45,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:38:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-10-13 04:38:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 91. [2020-10-13 04:38:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 04:38:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-10-13 04:38:45,976 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 48 [2020-10-13 04:38:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:45,976 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-10-13 04:38:45,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:38:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-10-13 04:38:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:38:45,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:45,977 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:45,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:38:45,977 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1612175666, now seen corresponding path program 18 times [2020-10-13 04:38:45,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:45,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379675680] [2020-10-13 04:38:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:45,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:46,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:47,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:38:47,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:47,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-13 04:38:47,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:38:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:38:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:47,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:47,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:47,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:47,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:47,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379675680] [2020-10-13 04:38:47,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:47,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:38:47,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083138542] [2020-10-13 04:38:47,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:38:47,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:47,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:38:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:38:47,767 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 22 states. [2020-10-13 04:38:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:49,350 INFO L93 Difference]: Finished difference Result 731 states and 1004 transitions. [2020-10-13 04:38:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:38:49,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 04:38:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:49,355 INFO L225 Difference]: With dead ends: 731 [2020-10-13 04:38:49,355 INFO L226 Difference]: Without dead ends: 683 [2020-10-13 04:38:49,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:38:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-13 04:38:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 93. [2020-10-13 04:38:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 04:38:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2020-10-13 04:38:49,378 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 50 [2020-10-13 04:38:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:49,380 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2020-10-13 04:38:49,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:38:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2020-10-13 04:38:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:38:49,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:49,381 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:49,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:38:49,382 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1596154924, now seen corresponding path program 19 times [2020-10-13 04:38:49,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:49,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292920655] [2020-10-13 04:38:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:49,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:38:50,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-13 04:38:50,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:38:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:38:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:50,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292920655] [2020-10-13 04:38:50,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:50,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:38:50,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103834330] [2020-10-13 04:38:50,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:38:50,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:38:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:50,892 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 23 states. [2020-10-13 04:38:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:52,266 INFO L93 Difference]: Finished difference Result 764 states and 1050 transitions. [2020-10-13 04:38:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:38:52,266 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 04:38:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:52,271 INFO L225 Difference]: With dead ends: 764 [2020-10-13 04:38:52,271 INFO L226 Difference]: Without dead ends: 716 [2020-10-13 04:38:52,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-13 04:38:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 95. [2020-10-13 04:38:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:38:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2020-10-13 04:38:52,286 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 52 [2020-10-13 04:38:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:52,287 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2020-10-13 04:38:52,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:38:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2020-10-13 04:38:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:38:52,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:52,288 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:52,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:38:52,288 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1015333386, now seen corresponding path program 20 times [2020-10-13 04:38:52,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:52,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633211998] [2020-10-13 04:38:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:53,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:38:53,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-13 04:38:53,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:38:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:38:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:53,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:53,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:53,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:53,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:53,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:53,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:53,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:53,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633211998] [2020-10-13 04:38:53,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:53,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:38:53,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498819093] [2020-10-13 04:38:53,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:38:53,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:53,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:38:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:38:53,633 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 24 states. [2020-10-13 04:38:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:55,107 INFO L93 Difference]: Finished difference Result 797 states and 1096 transitions. [2020-10-13 04:38:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:38:55,108 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-13 04:38:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:55,114 INFO L225 Difference]: With dead ends: 797 [2020-10-13 04:38:55,114 INFO L226 Difference]: Without dead ends: 749 [2020-10-13 04:38:55,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:38:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-10-13 04:38:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 97. [2020-10-13 04:38:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:38:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-10-13 04:38:55,127 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 54 [2020-10-13 04:38:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:55,127 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-10-13 04:38:55,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:38:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-10-13 04:38:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:38:55,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:55,128 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:55,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:38:55,128 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:55,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1191583848, now seen corresponding path program 21 times [2020-10-13 04:38:55,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:55,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772823324] [2020-10-13 04:38:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:55,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:56,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:56,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:38:56,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-13 04:38:56,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:38:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:38:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:56,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:56,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:56,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:56,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:56,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:56,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:56,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772823324] [2020-10-13 04:38:56,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:56,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:38:56,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840174806] [2020-10-13 04:38:56,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:38:56,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:38:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:38:56,699 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 25 states. [2020-10-13 04:38:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:58,446 INFO L93 Difference]: Finished difference Result 830 states and 1142 transitions. [2020-10-13 04:38:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:38:58,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 04:38:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:58,461 INFO L225 Difference]: With dead ends: 830 [2020-10-13 04:38:58,461 INFO L226 Difference]: Without dead ends: 782 [2020-10-13 04:38:58,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:38:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-10-13 04:38:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 99. [2020-10-13 04:38:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 04:38:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-10-13 04:38:58,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 56 [2020-10-13 04:38:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:58,484 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-10-13 04:38:58,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:38:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-10-13 04:38:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:38:58,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:58,485 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:58,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:38:58,486 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:58,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1230414010, now seen corresponding path program 22 times [2020-10-13 04:38:58,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:58,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415158731] [2020-10-13 04:38:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:58,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:59,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:38:59,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:59,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-13 04:38:59,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:59,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:38:59,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:59,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:38:59,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:59,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:59,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:59,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:59,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:59,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:59,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:59,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:59,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415158731] [2020-10-13 04:38:59,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:59,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:38:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115713429] [2020-10-13 04:38:59,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:38:59,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:59,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:38:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:38:59,953 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 26 states. [2020-10-13 04:39:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:01,944 INFO L93 Difference]: Finished difference Result 863 states and 1188 transitions. [2020-10-13 04:39:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:39:01,944 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 04:39:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:01,950 INFO L225 Difference]: With dead ends: 863 [2020-10-13 04:39:01,950 INFO L226 Difference]: Without dead ends: 815 [2020-10-13 04:39:01,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:39:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-13 04:39:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 101. [2020-10-13 04:39:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 04:39:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2020-10-13 04:39:01,966 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 58 [2020-10-13 04:39:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:01,966 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2020-10-13 04:39:01,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:39:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2020-10-13 04:39:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:39:01,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:01,967 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:01,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:39:01,968 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash 898081116, now seen corresponding path program 23 times [2020-10-13 04:39:01,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:01,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374898836] [2020-10-13 04:39:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:03,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:39:03,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:03,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-13 04:39:03,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:03,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:39:03,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:03,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:39:03,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:03,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:03,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:03,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:03,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:03,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:03,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:03,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:03,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:03,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374898836] [2020-10-13 04:39:03,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:03,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:39:03,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023047919] [2020-10-13 04:39:03,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:39:03,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:39:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:39:03,530 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand 27 states. [2020-10-13 04:39:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:05,507 INFO L93 Difference]: Finished difference Result 896 states and 1234 transitions. [2020-10-13 04:39:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:39:05,507 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 04:39:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:05,511 INFO L225 Difference]: With dead ends: 896 [2020-10-13 04:39:05,511 INFO L226 Difference]: Without dead ends: 848 [2020-10-13 04:39:05,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:39:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-10-13 04:39:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 103. [2020-10-13 04:39:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 04:39:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2020-10-13 04:39:05,529 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 60 [2020-10-13 04:39:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:05,529 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2020-10-13 04:39:05,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:39:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2020-10-13 04:39:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:39:05,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:05,530 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:05,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:39:05,530 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash -646250114, now seen corresponding path program 24 times [2020-10-13 04:39:05,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:05,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120214411] [2020-10-13 04:39:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:05,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:06,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:06,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:39:06,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:06,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:06,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:06,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:06,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:06,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:06,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:06,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120214411] [2020-10-13 04:39:06,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:06,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:39:06,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427190915] [2020-10-13 04:39:06,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:39:06,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:39:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:39:06,887 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 28 states. [2020-10-13 04:39:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:09,026 INFO L93 Difference]: Finished difference Result 929 states and 1280 transitions. [2020-10-13 04:39:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:39:09,026 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 04:39:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:09,030 INFO L225 Difference]: With dead ends: 929 [2020-10-13 04:39:09,030 INFO L226 Difference]: Without dead ends: 881 [2020-10-13 04:39:09,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:39:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-13 04:39:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 105. [2020-10-13 04:39:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 04:39:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2020-10-13 04:39:09,044 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 62 [2020-10-13 04:39:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:09,044 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2020-10-13 04:39:09,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:39:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2020-10-13 04:39:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:39:09,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:09,045 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:09,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:39:09,045 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1310122272, now seen corresponding path program 25 times [2020-10-13 04:39:09,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:09,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420212731] [2020-10-13 04:39:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:09,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:10,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:10,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:39:10,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-13 04:39:10,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:39:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:39:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:10,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:10,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:10,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:10,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:10,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420212731] [2020-10-13 04:39:10,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:10,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:39:10,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071471624] [2020-10-13 04:39:10,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:39:10,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:10,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:39:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:39:10,629 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand 29 states. [2020-10-13 04:39:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:13,003 INFO L93 Difference]: Finished difference Result 962 states and 1326 transitions. [2020-10-13 04:39:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:39:13,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-13 04:39:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:13,007 INFO L225 Difference]: With dead ends: 962 [2020-10-13 04:39:13,007 INFO L226 Difference]: Without dead ends: 914 [2020-10-13 04:39:13,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:39:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2020-10-13 04:39:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 107. [2020-10-13 04:39:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 04:39:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2020-10-13 04:39:13,022 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 64 [2020-10-13 04:39:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:13,023 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2020-10-13 04:39:13,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:39:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2020-10-13 04:39:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:39:13,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:13,023 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:13,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:39:13,024 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 188309570, now seen corresponding path program 26 times [2020-10-13 04:39:13,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:13,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629974463] [2020-10-13 04:39:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:13,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:14,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:39:14,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:14,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:14,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:14,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:14,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:14,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:14,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:14,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:14,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629974463] [2020-10-13 04:39:14,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:14,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:39:14,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715717682] [2020-10-13 04:39:14,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:39:14,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:39:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:39:14,731 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand 30 states. [2020-10-13 04:39:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:16,633 INFO L93 Difference]: Finished difference Result 995 states and 1372 transitions. [2020-10-13 04:39:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:39:16,633 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 04:39:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:16,637 INFO L225 Difference]: With dead ends: 995 [2020-10-13 04:39:16,637 INFO L226 Difference]: Without dead ends: 947 [2020-10-13 04:39:16,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:39:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2020-10-13 04:39:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 109. [2020-10-13 04:39:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:39:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2020-10-13 04:39:16,653 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 66 [2020-10-13 04:39:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:16,653 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2020-10-13 04:39:16,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:39:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2020-10-13 04:39:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:39:16,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:16,654 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:16,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:39:16,654 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash 163094244, now seen corresponding path program 27 times [2020-10-13 04:39:16,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:16,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347931570] [2020-10-13 04:39:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:17,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:17,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:39:17,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:17,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1317 [2020-10-13 04:39:17,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:17,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:39:17,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:17,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:39:17,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:18,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:18,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:18,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347931570] [2020-10-13 04:39:18,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:39:18,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939518921] [2020-10-13 04:39:18,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:39:18,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:39:18,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:39:18,491 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 31 states. [2020-10-13 04:39:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:20,553 INFO L93 Difference]: Finished difference Result 1028 states and 1418 transitions. [2020-10-13 04:39:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:39:20,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-13 04:39:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:20,558 INFO L225 Difference]: With dead ends: 1028 [2020-10-13 04:39:20,558 INFO L226 Difference]: Without dead ends: 980 [2020-10-13 04:39:20,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:39:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-10-13 04:39:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 111. [2020-10-13 04:39:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:39:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2020-10-13 04:39:20,572 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 68 [2020-10-13 04:39:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:20,573 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2020-10-13 04:39:20,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:39:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2020-10-13 04:39:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:39:20,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:20,574 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:20,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:39:20,574 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1700969734, now seen corresponding path program 28 times [2020-10-13 04:39:20,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:20,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939387915] [2020-10-13 04:39:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:39:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:22,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:22,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:22,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939387915] [2020-10-13 04:39:22,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:22,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:39:22,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248872842] [2020-10-13 04:39:22,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:39:22,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:22,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:39:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:39:22,628 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 32 states. [2020-10-13 04:39:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:24,848 INFO L93 Difference]: Finished difference Result 1061 states and 1464 transitions. [2020-10-13 04:39:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:39:24,848 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-13 04:39:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:24,853 INFO L225 Difference]: With dead ends: 1061 [2020-10-13 04:39:24,853 INFO L226 Difference]: Without dead ends: 1013 [2020-10-13 04:39:24,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:39:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-13 04:39:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 113. [2020-10-13 04:39:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 04:39:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2020-10-13 04:39:24,866 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 70 [2020-10-13 04:39:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:24,867 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2020-10-13 04:39:24,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:39:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2020-10-13 04:39:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:39:24,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:24,868 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:24,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:39:24,868 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2130565800, now seen corresponding path program 29 times [2020-10-13 04:39:24,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:24,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071075443] [2020-10-13 04:39:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:24,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:25,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:39:25,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:26,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:26,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:26,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:26,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:26,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071075443] [2020-10-13 04:39:26,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:26,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:39:26,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469684102] [2020-10-13 04:39:26,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:39:26,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:39:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:39:26,530 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand 33 states. [2020-10-13 04:39:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:29,431 INFO L93 Difference]: Finished difference Result 1094 states and 1510 transitions. [2020-10-13 04:39:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:39:29,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-13 04:39:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:29,436 INFO L225 Difference]: With dead ends: 1094 [2020-10-13 04:39:29,436 INFO L226 Difference]: Without dead ends: 1046 [2020-10-13 04:39:29,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:39:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2020-10-13 04:39:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 115. [2020-10-13 04:39:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 04:39:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2020-10-13 04:39:29,450 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 72 [2020-10-13 04:39:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:29,450 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2020-10-13 04:39:29,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:39:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2020-10-13 04:39:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:39:29,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:29,451 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:29,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:39:29,452 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1639442486, now seen corresponding path program 30 times [2020-10-13 04:39:29,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:29,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642565355] [2020-10-13 04:39:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:30,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:30,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:39:30,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:30,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1198 [2020-10-13 04:39:30,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:39:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:39:30,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:31,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:31,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:31,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:31,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:31,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642565355] [2020-10-13 04:39:31,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:31,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:39:31,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825071617] [2020-10-13 04:39:31,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:39:31,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:31,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:39:31,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:39:31,276 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand 34 states. [2020-10-13 04:39:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:33,582 INFO L93 Difference]: Finished difference Result 1127 states and 1556 transitions. [2020-10-13 04:39:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:39:33,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-13 04:39:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:33,589 INFO L225 Difference]: With dead ends: 1127 [2020-10-13 04:39:33,589 INFO L226 Difference]: Without dead ends: 1079 [2020-10-13 04:39:33,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:39:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-10-13 04:39:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 117. [2020-10-13 04:39:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 04:39:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2020-10-13 04:39:33,604 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 74 [2020-10-13 04:39:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:33,605 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2020-10-13 04:39:33,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:39:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2020-10-13 04:39:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:39:33,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:33,606 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:33,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:39:33,606 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash 334992492, now seen corresponding path program 31 times [2020-10-13 04:39:33,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:33,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014195778] [2020-10-13 04:39:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:33,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:34,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:39:34,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:34,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-13 04:39:34,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:34,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:39:34,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:34,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:39:34,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:35,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:35,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:35,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:35,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:39:35,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:35,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:35,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:35,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:35,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014195778] [2020-10-13 04:39:35,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:35,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:39:35,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378712023] [2020-10-13 04:39:35,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:39:35,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:39:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:39:35,562 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 35 states. [2020-10-13 04:39:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:38,898 INFO L93 Difference]: Finished difference Result 1160 states and 1602 transitions. [2020-10-13 04:39:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:39:38,898 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-13 04:39:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:38,902 INFO L225 Difference]: With dead ends: 1160 [2020-10-13 04:39:38,902 INFO L226 Difference]: Without dead ends: 1112 [2020-10-13 04:39:38,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:39:38,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2020-10-13 04:39:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 119. [2020-10-13 04:39:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:39:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2020-10-13 04:39:38,917 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 76 [2020-10-13 04:39:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:38,918 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2020-10-13 04:39:38,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:39:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2020-10-13 04:39:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:39:38,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:38,919 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:38,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:39:38,919 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -608538482, now seen corresponding path program 32 times [2020-10-13 04:39:38,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:38,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119563055] [2020-10-13 04:39:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:38,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:40,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:39:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:41,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:41,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:41,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:41,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:41,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:41,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:41,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:41,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:41,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:41,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:41,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:41,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119563055] [2020-10-13 04:39:41,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:41,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:39:41,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635040062] [2020-10-13 04:39:41,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:39:41,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:39:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:39:41,073 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 36 states. [2020-10-13 04:39:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:44,587 INFO L93 Difference]: Finished difference Result 1193 states and 1648 transitions. [2020-10-13 04:39:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:39:44,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-13 04:39:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:44,592 INFO L225 Difference]: With dead ends: 1193 [2020-10-13 04:39:44,592 INFO L226 Difference]: Without dead ends: 1145 [2020-10-13 04:39:44,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:39:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-10-13 04:39:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 121. [2020-10-13 04:39:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:39:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-10-13 04:39:44,607 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 78 [2020-10-13 04:39:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:44,608 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-10-13 04:39:44,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:39:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-10-13 04:39:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:39:44,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:44,609 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:44,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:39:44,609 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1103705040, now seen corresponding path program 33 times [2020-10-13 04:39:44,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:44,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274342300] [2020-10-13 04:39:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:44,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:46,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:46,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:39:46,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:46,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1464 [2020-10-13 04:39:46,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:46,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:39:46,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:39:46,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:46,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274342300] [2020-10-13 04:39:46,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:46,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:39:46,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117213915] [2020-10-13 04:39:46,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:39:46,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:39:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:39:46,812 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 37 states. [2020-10-13 04:39:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:49,738 INFO L93 Difference]: Finished difference Result 1226 states and 1694 transitions. [2020-10-13 04:39:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:39:49,739 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-13 04:39:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:49,744 INFO L225 Difference]: With dead ends: 1226 [2020-10-13 04:39:49,744 INFO L226 Difference]: Without dead ends: 1178 [2020-10-13 04:39:49,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:39:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-10-13 04:39:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 123. [2020-10-13 04:39:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:39:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-10-13 04:39:49,759 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 80 [2020-10-13 04:39:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:49,759 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-10-13 04:39:49,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:39:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-10-13 04:39:49,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:39:49,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:49,760 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:49,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:39:49,761 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash -217397422, now seen corresponding path program 34 times [2020-10-13 04:39:49,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:49,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614152240] [2020-10-13 04:39:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:49,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:51,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:39:51,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:51,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1597 [2020-10-13 04:39:51,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:39:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:39:51,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:52,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:52,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:52,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:52,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614152240] [2020-10-13 04:39:52,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:52,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:39:52,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231986669] [2020-10-13 04:39:52,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:39:52,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:39:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:39:52,130 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 38 states. [2020-10-13 04:39:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:55,658 INFO L93 Difference]: Finished difference Result 1259 states and 1740 transitions. [2020-10-13 04:39:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:39:55,659 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-13 04:39:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:55,663 INFO L225 Difference]: With dead ends: 1259 [2020-10-13 04:39:55,664 INFO L226 Difference]: Without dead ends: 1211 [2020-10-13 04:39:55,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:39:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2020-10-13 04:39:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 125. [2020-10-13 04:39:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 04:39:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-10-13 04:39:55,675 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 82 [2020-10-13 04:39:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:55,675 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-10-13 04:39:55,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:39:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-10-13 04:39:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:55,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:55,677 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:55,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:39:55,677 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1120698868, now seen corresponding path program 35 times [2020-10-13 04:39:55,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:55,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43273069] [2020-10-13 04:39:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:57,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:39:57,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:58,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:58,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:58,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:58,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:58,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:58,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:58,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:58,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43273069] [2020-10-13 04:39:58,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:58,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:39:58,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018852888] [2020-10-13 04:39:58,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:39:58,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:39:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:39:58,236 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 39 states. [2020-10-13 04:40:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:01,699 INFO L93 Difference]: Finished difference Result 1292 states and 1786 transitions. [2020-10-13 04:40:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:40:01,700 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-13 04:40:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:01,706 INFO L225 Difference]: With dead ends: 1292 [2020-10-13 04:40:01,706 INFO L226 Difference]: Without dead ends: 1244 [2020-10-13 04:40:01,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:40:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2020-10-13 04:40:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 127. [2020-10-13 04:40:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 04:40:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-10-13 04:40:01,722 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 84 [2020-10-13 04:40:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:01,722 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-10-13 04:40:01,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:40:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-10-13 04:40:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:40:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:01,723 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:01,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:40:01,724 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1458955242, now seen corresponding path program 36 times [2020-10-13 04:40:01,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:01,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719766606] [2020-10-13 04:40:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:01,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:01,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:03,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:40:03,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-13 04:40:03,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:40:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:40:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:04,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:04,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:04,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:04,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:04,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:04,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:04,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:04,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:04,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719766606] [2020-10-13 04:40:04,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:04,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:40:04,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162059474] [2020-10-13 04:40:04,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:40:04,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:40:04,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:40:04,608 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 40 states. [2020-10-13 04:40:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:08,922 INFO L93 Difference]: Finished difference Result 1325 states and 1832 transitions. [2020-10-13 04:40:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:40:08,923 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-13 04:40:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:08,930 INFO L225 Difference]: With dead ends: 1325 [2020-10-13 04:40:08,930 INFO L226 Difference]: Without dead ends: 1277 [2020-10-13 04:40:08,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:40:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2020-10-13 04:40:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 129. [2020-10-13 04:40:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 04:40:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2020-10-13 04:40:08,944 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 86 [2020-10-13 04:40:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:08,944 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2020-10-13 04:40:08,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:40:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2020-10-13 04:40:08,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 04:40:08,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:08,946 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:08,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:40:08,946 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:08,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1984542136, now seen corresponding path program 37 times [2020-10-13 04:40:08,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:08,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703472979] [2020-10-13 04:40:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:11,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2087 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:40:11,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:11,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:11,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:11,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:11,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:11,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:11,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:11,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:11,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:11,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:11,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:11,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703472979] [2020-10-13 04:40:11,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:11,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:40:11,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140823564] [2020-10-13 04:40:11,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:40:11,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:11,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:40:11,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:40:11,991 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand 41 states. [2020-10-13 04:40:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:16,569 INFO L93 Difference]: Finished difference Result 1358 states and 1878 transitions. [2020-10-13 04:40:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:40:16,569 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-13 04:40:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:16,576 INFO L225 Difference]: With dead ends: 1358 [2020-10-13 04:40:16,576 INFO L226 Difference]: Without dead ends: 1310 [2020-10-13 04:40:16,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:40:16,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-10-13 04:40:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 131. [2020-10-13 04:40:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 04:40:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-10-13 04:40:16,590 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 88 [2020-10-13 04:40:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:16,590 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-10-13 04:40:16,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:40:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-10-13 04:40:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:40:16,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:16,592 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:16,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:40:16,592 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash -234262822, now seen corresponding path program 38 times [2020-10-13 04:40:16,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:16,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212094231] [2020-10-13 04:40:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:16,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:18,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:18,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:40:18,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2220 [2020-10-13 04:40:18,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:40:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:40:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:19,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:19,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:19,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:19,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:19,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:19,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:19,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212094231] [2020-10-13 04:40:19,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:19,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:40:19,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955913165] [2020-10-13 04:40:19,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:40:19,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:40:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:40:19,811 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 42 states. [2020-10-13 04:40:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:24,461 INFO L93 Difference]: Finished difference Result 1391 states and 1924 transitions. [2020-10-13 04:40:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:40:24,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-13 04:40:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:24,468 INFO L225 Difference]: With dead ends: 1391 [2020-10-13 04:40:24,468 INFO L226 Difference]: Without dead ends: 1343 [2020-10-13 04:40:24,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:40:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2020-10-13 04:40:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 133. [2020-10-13 04:40:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:40:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2020-10-13 04:40:24,486 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 90 [2020-10-13 04:40:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:24,486 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2020-10-13 04:40:24,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:40:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2020-10-13 04:40:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:40:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:24,489 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:24,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:40:24,489 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2092918652, now seen corresponding path program 39 times [2020-10-13 04:40:24,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:24,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005104688] [2020-10-13 04:40:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:24,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:26,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:26,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:40:26,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:26,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-13 04:40:26,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:40:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:40:26,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:27,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:27,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:27,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:27,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:27,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:27,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:27,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:27,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005104688] [2020-10-13 04:40:27,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:27,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:40:27,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786956244] [2020-10-13 04:40:27,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:40:27,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:27,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:40:27,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:40:27,989 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand 43 states. [2020-10-13 04:40:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:32,152 INFO L93 Difference]: Finished difference Result 1424 states and 1970 transitions. [2020-10-13 04:40:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:40:32,152 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-13 04:40:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:32,158 INFO L225 Difference]: With dead ends: 1424 [2020-10-13 04:40:32,158 INFO L226 Difference]: Without dead ends: 1376 [2020-10-13 04:40:32,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:40:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2020-10-13 04:40:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 135. [2020-10-13 04:40:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 04:40:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2020-10-13 04:40:32,178 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 92 [2020-10-13 04:40:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:32,179 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2020-10-13 04:40:32,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:40:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2020-10-13 04:40:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:40:32,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:32,180 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:32,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:40:32,180 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:32,180 INFO L82 PathProgramCache]: Analyzing trace with hash 836353950, now seen corresponding path program 40 times [2020-10-13 04:40:32,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:32,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167133352] [2020-10-13 04:40:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:32,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:32,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:40:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:40:34,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:35,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:35,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:35,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:35,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:35,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167133352] [2020-10-13 04:40:35,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:35,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:40:35,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692417079] [2020-10-13 04:40:35,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:40:35,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:40:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:40:35,833 INFO L87 Difference]: Start difference. First operand 135 states and 148 transitions. Second operand 44 states. [2020-10-13 04:40:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:41,057 INFO L93 Difference]: Finished difference Result 1457 states and 2016 transitions. [2020-10-13 04:40:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:40:41,058 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-13 04:40:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:41,064 INFO L225 Difference]: With dead ends: 1457 [2020-10-13 04:40:41,064 INFO L226 Difference]: Without dead ends: 1409 [2020-10-13 04:40:41,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:40:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2020-10-13 04:40:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 137. [2020-10-13 04:40:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:40:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2020-10-13 04:40:41,081 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 94 [2020-10-13 04:40:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:41,082 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2020-10-13 04:40:41,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:40:41,082 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2020-10-13 04:40:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:40:41,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:41,083 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:41,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:40:41,083 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash 163485504, now seen corresponding path program 41 times [2020-10-13 04:40:41,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:41,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835116158] [2020-10-13 04:40:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:41,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:41,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:43,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:43,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:40:43,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:43,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2556 [2020-10-13 04:40:43,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:43,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:40:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:40:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:44,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:44,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:44,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:44,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:44,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:44,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:44,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:44,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:44,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835116158] [2020-10-13 04:40:44,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:44,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:40:44,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188699959] [2020-10-13 04:40:44,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:40:44,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:44,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:40:44,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:40:44,780 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand 45 states. [2020-10-13 04:40:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:50,408 INFO L93 Difference]: Finished difference Result 1490 states and 2062 transitions. [2020-10-13 04:40:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:40:50,409 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-13 04:40:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:50,412 INFO L225 Difference]: With dead ends: 1490 [2020-10-13 04:40:50,412 INFO L226 Difference]: Without dead ends: 1442 [2020-10-13 04:40:50,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:40:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2020-10-13 04:40:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 139. [2020-10-13 04:40:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 04:40:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 152 transitions. [2020-10-13 04:40:50,431 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 152 transitions. Word has length 96 [2020-10-13 04:40:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:50,431 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 152 transitions. [2020-10-13 04:40:50,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:40:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 152 transitions. [2020-10-13 04:40:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:40:50,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:50,433 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:50,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:40:50,433 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:50,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2076970594, now seen corresponding path program 42 times [2020-10-13 04:40:50,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:50,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602762986] [2020-10-13 04:40:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:50,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:53,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:53,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:40:53,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:53,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2968 [2020-10-13 04:40:53,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:53,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:40:53,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:53,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:40:53,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:54,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:54,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:54,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:54,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:54,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602762986] [2020-10-13 04:40:54,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:54,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:40:54,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412251418] [2020-10-13 04:40:54,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:40:54,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:40:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:40:54,593 INFO L87 Difference]: Start difference. First operand 139 states and 152 transitions. Second operand 46 states. [2020-10-13 04:41:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:00,359 INFO L93 Difference]: Finished difference Result 1523 states and 2108 transitions. [2020-10-13 04:41:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:41:00,359 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-13 04:41:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:00,363 INFO L225 Difference]: With dead ends: 1523 [2020-10-13 04:41:00,364 INFO L226 Difference]: Without dead ends: 1475 [2020-10-13 04:41:00,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:41:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2020-10-13 04:41:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 141. [2020-10-13 04:41:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 04:41:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2020-10-13 04:41:00,387 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 98 [2020-10-13 04:41:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:00,387 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2020-10-13 04:41:00,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:41:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2020-10-13 04:41:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:41:00,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:00,388 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:00,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:41:00,389 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1604827900, now seen corresponding path program 43 times [2020-10-13 04:41:00,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:00,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885402678] [2020-10-13 04:41:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:03,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3510 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:41:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:05,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:05,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:05,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:05,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:05,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:05,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:05,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:05,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:05,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885402678] [2020-10-13 04:41:05,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:05,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:41:05,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341743574] [2020-10-13 04:41:05,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:41:05,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:41:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:41:05,197 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand 47 states. [2020-10-13 04:41:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:11,243 INFO L93 Difference]: Finished difference Result 1556 states and 2154 transitions. [2020-10-13 04:41:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:41:11,244 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-13 04:41:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:11,250 INFO L225 Difference]: With dead ends: 1556 [2020-10-13 04:41:11,250 INFO L226 Difference]: Without dead ends: 1508 [2020-10-13 04:41:11,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:41:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2020-10-13 04:41:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 143. [2020-10-13 04:41:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 04:41:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2020-10-13 04:41:11,277 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 100 [2020-10-13 04:41:11,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:11,278 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2020-10-13 04:41:11,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:41:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2020-10-13 04:41:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:41:11,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:11,280 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:11,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:41:11,280 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:11,281 INFO L82 PathProgramCache]: Analyzing trace with hash -760128730, now seen corresponding path program 44 times [2020-10-13 04:41:11,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:11,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173045234] [2020-10-13 04:41:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:15,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3847 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:41:15,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:16,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:16,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:16,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:16,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:16,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:16,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:16,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:16,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:16,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173045234] [2020-10-13 04:41:16,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:16,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:41:16,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196004480] [2020-10-13 04:41:16,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:41:16,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:41:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:41:16,534 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand 48 states. [2020-10-13 04:41:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:21,806 INFO L93 Difference]: Finished difference Result 1589 states and 2200 transitions. [2020-10-13 04:41:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:41:21,807 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-13 04:41:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:21,811 INFO L225 Difference]: With dead ends: 1589 [2020-10-13 04:41:21,812 INFO L226 Difference]: Without dead ends: 1541 [2020-10-13 04:41:21,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:41:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2020-10-13 04:41:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 145. [2020-10-13 04:41:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:41:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-10-13 04:41:21,835 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 102 [2020-10-13 04:41:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:21,835 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-10-13 04:41:21,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:41:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-10-13 04:41:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:41:21,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:21,837 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:21,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:41:21,838 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash -753045304, now seen corresponding path program 45 times [2020-10-13 04:41:21,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:21,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952941318] [2020-10-13 04:41:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:22,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:26,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4209 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 04:41:26,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:27,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:27,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:27,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:27,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952941318] [2020-10-13 04:41:27,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:27,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 04:41:27,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906758545] [2020-10-13 04:41:27,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 04:41:27,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:27,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 04:41:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:41:27,535 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 49 states. [2020-10-13 04:41:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:34,164 INFO L93 Difference]: Finished difference Result 1622 states and 2246 transitions. [2020-10-13 04:41:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:41:34,164 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-13 04:41:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:34,168 INFO L225 Difference]: With dead ends: 1622 [2020-10-13 04:41:34,168 INFO L226 Difference]: Without dead ends: 1574 [2020-10-13 04:41:34,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:41:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2020-10-13 04:41:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 147. [2020-10-13 04:41:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:41:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2020-10-13 04:41:34,190 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 104 [2020-10-13 04:41:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:34,191 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2020-10-13 04:41:34,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 04:41:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2020-10-13 04:41:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:41:34,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:34,192 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:34,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:41:34,192 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1759159786, now seen corresponding path program 46 times [2020-10-13 04:41:34,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:34,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059826338] [2020-10-13 04:41:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:34,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:38,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:38,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:41:38,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:38,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4292 [2020-10-13 04:41:38,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:38,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:41:38,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:38,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 04:41:38,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:40,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:40,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:40,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:40,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:40,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:40,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:40,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:40,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059826338] [2020-10-13 04:41:40,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:40,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 04:41:40,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466390157] [2020-10-13 04:41:40,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 04:41:40,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 04:41:40,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:41:40,064 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand 50 states. [2020-10-13 04:41:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:46,564 INFO L93 Difference]: Finished difference Result 1655 states and 2292 transitions. [2020-10-13 04:41:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 04:41:46,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-13 04:41:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:46,567 INFO L225 Difference]: With dead ends: 1655 [2020-10-13 04:41:46,567 INFO L226 Difference]: Without dead ends: 1607 [2020-10-13 04:41:46,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:41:46,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2020-10-13 04:41:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 149. [2020-10-13 04:41:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 04:41:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2020-10-13 04:41:46,581 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 106 [2020-10-13 04:41:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:46,581 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2020-10-13 04:41:46,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 04:41:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2020-10-13 04:41:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 04:41:46,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:46,582 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:46,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:41:46,582 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2078336372, now seen corresponding path program 47 times [2020-10-13 04:41:46,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:46,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492215691] [2020-10-13 04:41:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:46,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:51,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4449 [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:51,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 04:41:51,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:52,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:52,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:52,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:52,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:52,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:41:52,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:52,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:52,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492215691] [2020-10-13 04:41:52,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:52,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 04:41:52,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567487104] [2020-10-13 04:41:52,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 04:41:52,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:52,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 04:41:52,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:41:52,819 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 51 states. [2020-10-13 04:41:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:59,398 INFO L93 Difference]: Finished difference Result 1688 states and 2338 transitions. [2020-10-13 04:41:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 04:41:59,399 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-13 04:41:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:59,404 INFO L225 Difference]: With dead ends: 1688 [2020-10-13 04:41:59,404 INFO L226 Difference]: Without dead ends: 1640 [2020-10-13 04:41:59,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:41:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-10-13 04:41:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 151. [2020-10-13 04:41:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 04:41:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2020-10-13 04:41:59,424 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 108 [2020-10-13 04:41:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:59,425 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2020-10-13 04:41:59,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 04:41:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2020-10-13 04:41:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:41:59,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:59,426 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:59,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:41:59,426 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash -535236946, now seen corresponding path program 48 times [2020-10-13 04:41:59,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:59,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183254961] [2020-10-13 04:41:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:59,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4190 [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 04:42:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:05,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183254961] [2020-10-13 04:42:05,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:05,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 04:42:05,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447890712] [2020-10-13 04:42:05,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 04:42:05,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 04:42:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:42:05,208 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand 52 states. [2020-10-13 04:42:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:10,550 INFO L93 Difference]: Finished difference Result 1721 states and 2384 transitions. [2020-10-13 04:42:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 04:42:10,551 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-13 04:42:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:10,553 INFO L225 Difference]: With dead ends: 1721 [2020-10-13 04:42:10,553 INFO L226 Difference]: Without dead ends: 1673 [2020-10-13 04:42:10,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:42:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2020-10-13 04:42:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 153. [2020-10-13 04:42:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 04:42:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2020-10-13 04:42:10,574 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 110 [2020-10-13 04:42:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:10,574 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2020-10-13 04:42:10,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 04:42:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2020-10-13 04:42:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:42:10,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:10,575 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:10,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:42:10,575 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash 619594320, now seen corresponding path program 49 times [2020-10-13 04:42:10,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:10,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963445812] [2020-10-13 04:42:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:10,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking...