/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:41:27,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:41:27,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:41:27,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:41:27,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:41:27,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:41:27,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:41:27,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:41:27,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:41:27,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:41:27,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:41:27,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:41:27,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:41:27,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:41:27,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:41:27,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:41:27,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:41:27,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:41:27,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:41:27,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:41:27,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:41:27,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:41:27,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:41:27,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:41:27,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:41:27,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:41:27,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:41:27,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:41:27,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:41:27,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:41:27,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:41:27,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:41:27,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:41:27,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:41:27,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:41:27,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:41:27,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:41:27,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:41:27,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:41:27,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:41:27,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:41:27,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:41:27,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:41:27,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:41:27,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:41:27,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:41:27,714 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:41:27,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:41:27,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:41:27,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:41:27,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:41:27,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:41:27,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:41:27,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:41:27,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:41:27,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:41:27,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:41:27,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:41:27,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:41:27,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:41:27,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:41:27,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:41:27,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:41:27,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:41:27,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:41:27,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:41:27,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:41:27,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:41:27,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:41:27,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:41:27,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:41:27,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:41:28,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:41:28,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:41:28,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:41:28,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:41:28,047 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:41:28,047 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:41:28,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f68de73b1/308b4dfdb043487b8eff6a80963d217d/FLAG8f816e054 [2020-10-13 14:41:28,587 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:41:28,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:41:28,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f68de73b1/308b4dfdb043487b8eff6a80963d217d/FLAG8f816e054 [2020-10-13 14:41:28,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f68de73b1/308b4dfdb043487b8eff6a80963d217d [2020-10-13 14:41:28,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:41:28,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:41:28,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:41:28,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:41:28,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:41:28,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:41:28" (1/1) ... [2020-10-13 14:41:28,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248aaf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:28, skipping insertion in model container [2020-10-13 14:41:28,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:41:28" (1/1) ... [2020-10-13 14:41:28,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:41:29,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:41:29,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:41:29,270 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:41:29,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:41:29,442 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:41:29,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29 WrapperNode [2020-10-13 14:41:29,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:41:29,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:41:29,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:41:29,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:41:29,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... [2020-10-13 14:41:29,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:41:29,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:41:29,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:41:29,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:41:29,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:41:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:41:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:41:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:41:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:41:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:41:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:41:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:41:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:41:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:41:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:41:30,228 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:41:30,228 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:41:30,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:41:30 BoogieIcfgContainer [2020-10-13 14:41:30,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:41:30,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:41:30,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:41:30,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:41:30,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:41:28" (1/3) ... [2020-10-13 14:41:30,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e9514a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:41:30, skipping insertion in model container [2020-10-13 14:41:30,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:41:29" (2/3) ... [2020-10-13 14:41:30,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e9514a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:41:30, skipping insertion in model container [2020-10-13 14:41:30,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:41:30" (3/3) ... [2020-10-13 14:41:30,242 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:41:30,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:41:30,261 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:41:30,274 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:41:30,295 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:41:30,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:41:30,296 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:41:30,296 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:41:30,296 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:41:30,296 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:41:30,297 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:41:30,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:41:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-10-13 14:41:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:41:30,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:30,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:30,327 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash 794325759, now seen corresponding path program 1 times [2020-10-13 14:41:30,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:30,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108994344] [2020-10-13 14:41:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:30,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:31,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:32,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:32,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:41:32,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:41:32,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1748 [2020-10-13 14:41:32,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:41:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:41:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:41:32,582 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:32,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:32,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:32,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:32,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:32,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:41:32,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:32,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108994344] [2020-10-13 14:41:32,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:32,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:32,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428652395] [2020-10-13 14:41:32,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:32,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:32,649 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 4 states. [2020-10-13 14:41:32,898 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:41:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:33,503 INFO L93 Difference]: Finished difference Result 258 states and 408 transitions. [2020-10-13 14:41:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:33,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:41:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:33,519 INFO L225 Difference]: With dead ends: 258 [2020-10-13 14:41:33,519 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 14:41:33,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 14:41:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-13 14:41:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 14:41:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2020-10-13 14:41:33,580 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 52 [2020-10-13 14:41:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:33,581 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2020-10-13 14:41:33,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2020-10-13 14:41:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:41:33,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:33,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:33,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:41:33,584 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 936453422, now seen corresponding path program 1 times [2020-10-13 14:41:33,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:33,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183489440] [2020-10-13 14:41:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:33,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:33,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:34,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:34,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:41:34,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:41:34,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-13 14:41:34,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:41:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:41:34,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:34,332 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:34,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:34,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:34,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:34,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:34,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:34,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:41:34,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:34,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:34,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183489440] [2020-10-13 14:41:34,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:34,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:34,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375213093] [2020-10-13 14:41:34,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:34,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:34,362 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand 4 states. [2020-10-13 14:41:34,488 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:41:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:34,929 INFO L93 Difference]: Finished difference Result 407 states and 627 transitions. [2020-10-13 14:41:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:34,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:41:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:34,933 INFO L225 Difference]: With dead ends: 407 [2020-10-13 14:41:34,933 INFO L226 Difference]: Without dead ends: 271 [2020-10-13 14:41:34,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-13 14:41:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-10-13 14:41:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-13 14:41:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 408 transitions. [2020-10-13 14:41:34,962 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 408 transitions. Word has length 53 [2020-10-13 14:41:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:34,963 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 408 transitions. [2020-10-13 14:41:34,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 408 transitions. [2020-10-13 14:41:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:41:34,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:34,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:34,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:41:34,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:34,966 INFO L82 PathProgramCache]: Analyzing trace with hash 426764510, now seen corresponding path program 1 times [2020-10-13 14:41:34,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:34,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461479854] [2020-10-13 14:41:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:35,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:35,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:41:35,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:35,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 14:41:35,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:35,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:35,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:41:35,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:41:35,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:35,421 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:35,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:35,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:35,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:35,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:35,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:41:35,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:35,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:35,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461479854] [2020-10-13 14:41:35,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:35,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:35,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998352722] [2020-10-13 14:41:35,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:35,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:35,452 INFO L87 Difference]: Start difference. First operand 269 states and 408 transitions. Second operand 4 states. [2020-10-13 14:41:35,643 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:41:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:36,032 INFO L93 Difference]: Finished difference Result 681 states and 1058 transitions. [2020-10-13 14:41:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:36,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:41:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:36,035 INFO L225 Difference]: With dead ends: 681 [2020-10-13 14:41:36,036 INFO L226 Difference]: Without dead ends: 443 [2020-10-13 14:41:36,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-13 14:41:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2020-10-13 14:41:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-13 14:41:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 676 transitions. [2020-10-13 14:41:36,070 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 676 transitions. Word has length 54 [2020-10-13 14:41:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:36,071 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 676 transitions. [2020-10-13 14:41:36,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 676 transitions. [2020-10-13 14:41:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:41:36,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:36,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:36,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:41:36,073 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 996649111, now seen corresponding path program 1 times [2020-10-13 14:41:36,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:36,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13332311] [2020-10-13 14:41:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:36,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:36,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:41:36,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:36,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-13 14:41:36,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:41:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:41:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:41:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:37,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:37,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:37,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:37,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:37,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:41:37,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:37,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:37,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:37,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:37,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:37,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13332311] [2020-10-13 14:41:37,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:37,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:41:37,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984405586] [2020-10-13 14:41:37,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:41:37,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:41:37,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:41:37,106 INFO L87 Difference]: Start difference. First operand 441 states and 676 transitions. Second operand 7 states. [2020-10-13 14:41:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:38,117 INFO L93 Difference]: Finished difference Result 1877 states and 2920 transitions. [2020-10-13 14:41:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:38,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:41:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:38,126 INFO L225 Difference]: With dead ends: 1877 [2020-10-13 14:41:38,126 INFO L226 Difference]: Without dead ends: 1467 [2020-10-13 14:41:38,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:41:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2020-10-13 14:41:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1461. [2020-10-13 14:41:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-10-13 14:41:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2264 transitions. [2020-10-13 14:41:38,214 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2264 transitions. Word has length 55 [2020-10-13 14:41:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:38,214 INFO L479 AbstractCegarLoop]: Abstraction has 1461 states and 2264 transitions. [2020-10-13 14:41:38,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:41:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2264 transitions. [2020-10-13 14:41:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:41:38,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:38,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:38,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:41:38,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1151388711, now seen corresponding path program 1 times [2020-10-13 14:41:38,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:38,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145638040] [2020-10-13 14:41:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:38,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:38,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:38,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:38,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:41:38,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:41:38,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-13 14:41:38,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:38,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:41:38,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:41:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:38,939 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:38,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:38,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:38,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:38,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:38,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:41:38,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:38,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:38,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145638040] [2020-10-13 14:41:38,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:38,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:38,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118971833] [2020-10-13 14:41:38,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:38,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:38,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:38,967 INFO L87 Difference]: Start difference. First operand 1461 states and 2264 transitions. Second operand 4 states. [2020-10-13 14:41:39,143 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:41:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:39,838 INFO L93 Difference]: Finished difference Result 3905 states and 6058 transitions. [2020-10-13 14:41:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:39,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:41:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:39,855 INFO L225 Difference]: With dead ends: 3905 [2020-10-13 14:41:39,856 INFO L226 Difference]: Without dead ends: 2475 [2020-10-13 14:41:39,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2020-10-13 14:41:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2020-10-13 14:41:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2473 states. [2020-10-13 14:41:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3792 transitions. [2020-10-13 14:41:40,079 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3792 transitions. Word has length 57 [2020-10-13 14:41:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:40,079 INFO L479 AbstractCegarLoop]: Abstraction has 2473 states and 3792 transitions. [2020-10-13 14:41:40,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3792 transitions. [2020-10-13 14:41:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:41:40,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:40,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:40,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:41:40,082 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1200842706, now seen corresponding path program 1 times [2020-10-13 14:41:40,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:40,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627162914] [2020-10-13 14:41:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:40,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:40,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:40,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:41:40,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:40,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-13 14:41:40,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:41:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:41:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:41:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:40,867 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:40,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:40,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:40,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:40,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:40,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:41:40,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:41:40,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:40,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627162914] [2020-10-13 14:41:40,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:40,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:40,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023263964] [2020-10-13 14:41:40,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:41:40,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:41:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:40,909 INFO L87 Difference]: Start difference. First operand 2473 states and 3792 transitions. Second operand 6 states. [2020-10-13 14:41:41,070 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 14:41:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:41,840 INFO L93 Difference]: Finished difference Result 7309 states and 11218 transitions. [2020-10-13 14:41:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:41,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 14:41:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:41,872 INFO L225 Difference]: With dead ends: 7309 [2020-10-13 14:41:41,872 INFO L226 Difference]: Without dead ends: 4867 [2020-10-13 14:41:41,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:41:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2020-10-13 14:41:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 4865. [2020-10-13 14:41:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4865 states. [2020-10-13 14:41:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 7408 transitions. [2020-10-13 14:41:42,289 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 7408 transitions. Word has length 57 [2020-10-13 14:41:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:42,289 INFO L479 AbstractCegarLoop]: Abstraction has 4865 states and 7408 transitions. [2020-10-13 14:41:42,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:41:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 7408 transitions. [2020-10-13 14:41:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:41:42,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:42,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:42,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:41:42,292 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 574001257, now seen corresponding path program 1 times [2020-10-13 14:41:42,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:42,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974790157] [2020-10-13 14:41:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:42,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:42,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:41:42,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:42,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-13 14:41:42,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:42,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:41:42,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:41:42,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:41:42,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:42,795 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:42,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:42,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:42,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:42,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:42,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:42,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:41:42,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:42,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:42,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:42,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:42,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:42,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974790157] [2020-10-13 14:41:42,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:42,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:41:42,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133787211] [2020-10-13 14:41:42,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:41:42,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:42,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:41:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:41:42,838 INFO L87 Difference]: Start difference. First operand 4865 states and 7408 transitions. Second operand 7 states. [2020-10-13 14:41:43,017 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 14:41:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:44,367 INFO L93 Difference]: Finished difference Result 22131 states and 33741 transitions. [2020-10-13 14:41:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:41:44,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-13 14:41:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:44,464 INFO L225 Difference]: With dead ends: 22131 [2020-10-13 14:41:44,464 INFO L226 Difference]: Without dead ends: 17297 [2020-10-13 14:41:44,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:41:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17297 states. [2020-10-13 14:41:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17297 to 9697. [2020-10-13 14:41:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9697 states. [2020-10-13 14:41:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 14528 transitions. [2020-10-13 14:41:45,319 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 14528 transitions. Word has length 57 [2020-10-13 14:41:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:45,320 INFO L479 AbstractCegarLoop]: Abstraction has 9697 states and 14528 transitions. [2020-10-13 14:41:45,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:41:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 14528 transitions. [2020-10-13 14:41:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:41:45,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:45,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:45,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:41:45,322 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash 595637033, now seen corresponding path program 1 times [2020-10-13 14:41:45,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:45,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542761586] [2020-10-13 14:41:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:45,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:45,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:41:45,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:45,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-13 14:41:45,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:45,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:41:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:41:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:41:45,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:45,708 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:45,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:45,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:45,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:45,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:45,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:45,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:41:45,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:45,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:45,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542761586] [2020-10-13 14:41:45,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:45,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:45,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598344684] [2020-10-13 14:41:45,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:41:45,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:41:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:45,743 INFO L87 Difference]: Start difference. First operand 9697 states and 14528 transitions. Second operand 5 states. [2020-10-13 14:41:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:47,476 INFO L93 Difference]: Finished difference Result 19875 states and 29537 transitions. [2020-10-13 14:41:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:41:47,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:41:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:47,520 INFO L225 Difference]: With dead ends: 19875 [2020-10-13 14:41:47,520 INFO L226 Difference]: Without dead ends: 19873 [2020-10-13 14:41:47,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19873 states. [2020-10-13 14:41:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19873 to 10209. [2020-10-13 14:41:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10209 states. [2020-10-13 14:41:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 15040 transitions. [2020-10-13 14:41:48,308 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 15040 transitions. Word has length 58 [2020-10-13 14:41:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:48,308 INFO L479 AbstractCegarLoop]: Abstraction has 10209 states and 15040 transitions. [2020-10-13 14:41:48,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:41:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 15040 transitions. [2020-10-13 14:41:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:41:48,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:48,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:48,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:41:48,310 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:48,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1294498584, now seen corresponding path program 1 times [2020-10-13 14:41:48,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:48,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637222744] [2020-10-13 14:41:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:48,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:48,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:41:48,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:48,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 14:41:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:41:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:41:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:48,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:48,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:48,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:48,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:48,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:41:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:48,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637222744] [2020-10-13 14:41:48,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:48,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:48,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620109057] [2020-10-13 14:41:48,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:48,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:48,570 INFO L87 Difference]: Start difference. First operand 10209 states and 15040 transitions. Second operand 4 states. [2020-10-13 14:41:48,693 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:41:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:49,826 INFO L93 Difference]: Finished difference Result 24811 states and 36536 transitions. [2020-10-13 14:41:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:49,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 14:41:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:49,856 INFO L225 Difference]: With dead ends: 24811 [2020-10-13 14:41:49,856 INFO L226 Difference]: Without dead ends: 14633 [2020-10-13 14:41:49,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14633 states. [2020-10-13 14:41:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14633 to 14519. [2020-10-13 14:41:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14519 states. [2020-10-13 14:41:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 21190 transitions. [2020-10-13 14:41:50,771 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 21190 transitions. Word has length 59 [2020-10-13 14:41:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:50,771 INFO L479 AbstractCegarLoop]: Abstraction has 14519 states and 21190 transitions. [2020-10-13 14:41:50,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 21190 transitions. [2020-10-13 14:41:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:41:50,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:50,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:50,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:41:50,779 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:50,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2112491066, now seen corresponding path program 1 times [2020-10-13 14:41:50,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:50,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292042792] [2020-10-13 14:41:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:50,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:50,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:51,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:51,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:54,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:55,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:55,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:41:55,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:41:55,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:41:55,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:41:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:41:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:55,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:55,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:55,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:55,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:55,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:41:55,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:55,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:55,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292042792] [2020-10-13 14:41:55,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:55,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:55,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29628429] [2020-10-13 14:41:55,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:55,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:55,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:55,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:55,980 INFO L87 Difference]: Start difference. First operand 14519 states and 21190 transitions. Second operand 4 states. [2020-10-13 14:41:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:56,907 INFO L93 Difference]: Finished difference Result 24828 states and 36371 transitions. [2020-10-13 14:41:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:41:56,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:41:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:56,933 INFO L225 Difference]: With dead ends: 24828 [2020-10-13 14:41:56,933 INFO L226 Difference]: Without dead ends: 10342 [2020-10-13 14:41:56,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-10-13 14:41:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 10340. [2020-10-13 14:41:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10340 states. [2020-10-13 14:41:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10340 states to 10340 states and 15081 transitions. [2020-10-13 14:41:57,839 INFO L78 Accepts]: Start accepts. Automaton has 10340 states and 15081 transitions. Word has length 81 [2020-10-13 14:41:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:57,839 INFO L479 AbstractCegarLoop]: Abstraction has 10340 states and 15081 transitions. [2020-10-13 14:41:57,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10340 states and 15081 transitions. [2020-10-13 14:41:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:41:57,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:57,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:57,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:41:57,843 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -694088643, now seen corresponding path program 1 times [2020-10-13 14:41:57,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:57,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14062636] [2020-10-13 14:41:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:59,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:59,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:41:59,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:41:59,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1573 [2020-10-13 14:41:59,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:41:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:41:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:41:59,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:59,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:59,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:59,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:59,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:41:59,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:59,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:59,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14062636] [2020-10-13 14:41:59,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:41:59,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:41:59,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167053803] [2020-10-13 14:41:59,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:41:59,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:41:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:59,936 INFO L87 Difference]: Start difference. First operand 10340 states and 15081 transitions. Second operand 9 states. [2020-10-13 14:42:00,087 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:42:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:05,770 INFO L93 Difference]: Finished difference Result 54464 states and 78725 transitions. [2020-10-13 14:42:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:42:05,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:42:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:05,871 INFO L225 Difference]: With dead ends: 54464 [2020-10-13 14:42:05,871 INFO L226 Difference]: Without dead ends: 46670 [2020-10-13 14:42:05,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:42:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2020-10-13 14:42:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 17219. [2020-10-13 14:42:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17219 states. [2020-10-13 14:42:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17219 states to 17219 states and 25000 transitions. [2020-10-13 14:42:07,616 INFO L78 Accepts]: Start accepts. Automaton has 17219 states and 25000 transitions. Word has length 82 [2020-10-13 14:42:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:07,616 INFO L479 AbstractCegarLoop]: Abstraction has 17219 states and 25000 transitions. [2020-10-13 14:42:07,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:42:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17219 states and 25000 transitions. [2020-10-13 14:42:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:42:07,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:07,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:07,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:42:07,622 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash -214853882, now seen corresponding path program 1 times [2020-10-13 14:42:07,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:07,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814049102] [2020-10-13 14:42:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:07,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:07,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:07,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:42:07,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-13 14:42:07,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:07,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:42:07,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:42:07,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:42:07,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:08,085 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:42:08,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:08,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:08,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:08,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:42:08,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:42:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:42:08,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 14:42:08,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814049102] [2020-10-13 14:42:08,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:08,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:42:08,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863951681] [2020-10-13 14:42:08,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:42:08,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:08,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:42:08,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:42:08,131 INFO L87 Difference]: Start difference. First operand 17219 states and 25000 transitions. Second operand 6 states. [2020-10-13 14:42:08,273 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 14:42:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:11,374 INFO L93 Difference]: Finished difference Result 51067 states and 74054 transitions. [2020-10-13 14:42:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:42:11,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-13 14:42:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:11,437 INFO L225 Difference]: With dead ends: 51067 [2020-10-13 14:42:11,438 INFO L226 Difference]: Without dead ends: 33941 [2020-10-13 14:42:11,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33941 states. [2020-10-13 14:42:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33941 to 33939. [2020-10-13 14:42:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33939 states. [2020-10-13 14:42:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33939 states to 33939 states and 48898 transitions. [2020-10-13 14:42:13,896 INFO L78 Accepts]: Start accepts. Automaton has 33939 states and 48898 transitions. Word has length 82 [2020-10-13 14:42:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:13,897 INFO L479 AbstractCegarLoop]: Abstraction has 33939 states and 48898 transitions. [2020-10-13 14:42:13,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:42:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 33939 states and 48898 transitions. [2020-10-13 14:42:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:42:13,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:13,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:13,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:42:13,903 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1282399295, now seen corresponding path program 1 times [2020-10-13 14:42:13,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:13,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586986923] [2020-10-13 14:42:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:13,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:14,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:14,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:42:14,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:42:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-13 14:42:14,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:42:14,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:42:14,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 14:42:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:15,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:15,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:15,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:15,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:15,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:15,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:42:15,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:15,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:15,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:42:15,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586986923] [2020-10-13 14:42:15,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:42:15,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:42:15,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010677553] [2020-10-13 14:42:15,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:42:15,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:15,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:42:15,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:15,185 INFO L87 Difference]: Start difference. First operand 33939 states and 48898 transitions. Second operand 9 states. [2020-10-13 14:42:15,342 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:42:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:28,640 INFO L93 Difference]: Finished difference Result 148007 states and 211150 transitions. [2020-10-13 14:42:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:42:28,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:42:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:28,781 INFO L225 Difference]: With dead ends: 148007 [2020-10-13 14:42:28,782 INFO L226 Difference]: Without dead ends: 129669 [2020-10-13 14:42:28,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:42:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129669 states. [2020-10-13 14:42:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129669 to 55023. [2020-10-13 14:42:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55023 states. [2020-10-13 14:42:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55023 states to 55023 states and 79010 transitions. [2020-10-13 14:42:35,345 INFO L78 Accepts]: Start accepts. Automaton has 55023 states and 79010 transitions. Word has length 82 [2020-10-13 14:42:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:35,345 INFO L479 AbstractCegarLoop]: Abstraction has 55023 states and 79010 transitions. [2020-10-13 14:42:35,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:42:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 55023 states and 79010 transitions. [2020-10-13 14:42:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:42:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:35,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:35,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:42:35,353 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1741984280, now seen corresponding path program 1 times [2020-10-13 14:42:35,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:35,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93764031] [2020-10-13 14:42:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:35,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:35,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:42:35,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-13 14:42:35,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:42:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:42:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:42:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:35,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:35,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:35,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:35,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:35,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:42:35,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:35,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:42:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:42:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:42:35,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93764031] [2020-10-13 14:42:35,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:35,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:42:35,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769276266] [2020-10-13 14:42:35,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:42:35,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:35,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:42:35,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:42:35,880 INFO L87 Difference]: Start difference. First operand 55023 states and 79010 transitions. Second operand 6 states. [2020-10-13 14:42:36,011 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 14:42:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:45,493 INFO L93 Difference]: Finished difference Result 163944 states and 235117 transitions. [2020-10-13 14:42:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:42:45,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-13 14:42:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:45,620 INFO L225 Difference]: With dead ends: 163944 [2020-10-13 14:42:45,621 INFO L226 Difference]: Without dead ends: 109089 [2020-10-13 14:42:45,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109089 states. [2020-10-13 14:42:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109089 to 109087. [2020-10-13 14:42:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109087 states. [2020-10-13 14:42:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109087 states to 109087 states and 155655 transitions. [2020-10-13 14:42:56,624 INFO L78 Accepts]: Start accepts. Automaton has 109087 states and 155655 transitions. Word has length 82 [2020-10-13 14:42:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:56,624 INFO L479 AbstractCegarLoop]: Abstraction has 109087 states and 155655 transitions. [2020-10-13 14:42:56,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:42:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 109087 states and 155655 transitions. [2020-10-13 14:42:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:42:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:56,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:56,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:42:56,630 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1585036413, now seen corresponding path program 1 times [2020-10-13 14:42:56,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:56,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182037048] [2020-10-13 14:42:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:56,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:56,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:57,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:57,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:42:57,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:42:57,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-13 14:42:57,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:42:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:42:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:42:57,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:58,017 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:42:58,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:58,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:58,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:58,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:58,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:42:58,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:58,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:58,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:58,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:42:58,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182037048] [2020-10-13 14:42:58,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:42:58,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:42:58,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872362193] [2020-10-13 14:42:58,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:42:58,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:42:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:58,072 INFO L87 Difference]: Start difference. First operand 109087 states and 155655 transitions. Second operand 9 states. [2020-10-13 14:42:58,305 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:43:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:32,168 INFO L93 Difference]: Finished difference Result 360651 states and 509171 transitions. [2020-10-13 14:43:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 14:43:32,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:43:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:32,598 INFO L225 Difference]: With dead ends: 360651 [2020-10-13 14:43:32,598 INFO L226 Difference]: Without dead ends: 328165 [2020-10-13 14:43:32,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-13 14:43:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328165 states. [2020-10-13 14:43:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328165 to 165239. [2020-10-13 14:43:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165239 states. [2020-10-13 14:43:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165239 states to 165239 states and 235435 transitions. [2020-10-13 14:43:53,000 INFO L78 Accepts]: Start accepts. Automaton has 165239 states and 235435 transitions. Word has length 82 [2020-10-13 14:43:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:53,000 INFO L479 AbstractCegarLoop]: Abstraction has 165239 states and 235435 transitions. [2020-10-13 14:43:53,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:43:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 165239 states and 235435 transitions. [2020-10-13 14:43:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:43:53,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:53,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:53,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:43:53,007 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1715574317, now seen corresponding path program 1 times [2020-10-13 14:43:53,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:53,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418502115] [2020-10-13 14:43:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:53,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:53,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:53,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:43:53,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:43:53,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-13 14:43:53,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:43:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:43:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:43:53,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:53,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:53,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:53,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:53,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:53,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:43:53,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:43:53,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 14:43:53,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418502115] [2020-10-13 14:43:53,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:53,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:43:53,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45612851] [2020-10-13 14:43:53,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:43:53,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:43:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:43:53,492 INFO L87 Difference]: Start difference. First operand 165239 states and 235435 transitions. Second operand 6 states. [2020-10-13 14:43:53,665 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 14:44:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:44:28,125 INFO L93 Difference]: Finished difference Result 493410 states and 702020 transitions. [2020-10-13 14:44:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:44:28,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-13 14:44:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:44:28,543 INFO L225 Difference]: With dead ends: 493410 [2020-10-13 14:44:28,543 INFO L226 Difference]: Without dead ends: 328229 [2020-10-13 14:44:28,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:44:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328229 states. [2020-10-13 14:45:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328229 to 328227. [2020-10-13 14:45:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328227 states. [2020-10-13 14:45:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328227 states to 328227 states and 464730 transitions. [2020-10-13 14:45:11,325 INFO L78 Accepts]: Start accepts. Automaton has 328227 states and 464730 transitions. Word has length 83 [2020-10-13 14:45:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:45:11,325 INFO L479 AbstractCegarLoop]: Abstraction has 328227 states and 464730 transitions. [2020-10-13 14:45:11,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:45:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 328227 states and 464730 transitions. [2020-10-13 14:45:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:45:11,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:45:11,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:45:11,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:45:11,336 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:45:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:45:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash -781416242, now seen corresponding path program 1 times [2020-10-13 14:45:11,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:45:11,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294081567] [2020-10-13 14:45:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:45:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:12,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:12,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:45:12,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:45:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-13 14:45:12,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:45:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:45:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:45:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:12,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:45:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:12,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:12,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:12,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:45:12,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:45:12,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:45:12,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:45:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:45:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:45:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:45:12,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294081567] [2020-10-13 14:45:12,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:45:12,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:45:12,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177314497] [2020-10-13 14:45:12,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:45:12,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:45:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:45:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:45:12,558 INFO L87 Difference]: Start difference. First operand 328227 states and 464730 transitions. Second operand 9 states.