/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=BIGGEST --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_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:13:56,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:13:56,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:13:56,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:13:56,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:13:56,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:13:56,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:13:56,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:13:56,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:13:56,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:13:56,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:13:56,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:13:56,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:13:56,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:13:56,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:13:56,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:13:56,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:13:56,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:13:56,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:13:56,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:13:56,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:13:56,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:13:56,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:13:56,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:13:56,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:13:56,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:13:56,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:13:56,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:13:56,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:13:56,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:13:56,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:13:56,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:13:56,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:13:56,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:13:56,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:13:56,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:13:56,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:13:56,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:13:56,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:13:56,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:13:56,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:13:56,695 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 [2020-10-12 19:13:56,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:13:56,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:13:56,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:13:56,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:13:56,718 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:13:56,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:13:56,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:13:56,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:13:56,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:13:56,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:13:56,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:13:56,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:13:56,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:13:56,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:13:56,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:13:56,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:13:56,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:13:56,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:13:56,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:13:56,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:13:56,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:13:56,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:13:56,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:13:56,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:13:56,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:13:56,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:13:56,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:13:56,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:13:56,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:13:56,723 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:13:57,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:13:57,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:13:57,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:13:57,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:13:57,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:13:57,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:13:57,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6553af7d2/26af0abe22b7443485f03f58da9a591c/FLAG7b1cca3cd [2020-10-12 19:13:57,619 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:13:57,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:13:57,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6553af7d2/26af0abe22b7443485f03f58da9a591c/FLAG7b1cca3cd [2020-10-12 19:13:57,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6553af7d2/26af0abe22b7443485f03f58da9a591c [2020-10-12 19:13:57,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:13:57,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:13:57,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:13:57,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:13:57,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:13:57,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:13:57" (1/1) ... [2020-10-12 19:13:57,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:57, skipping insertion in model container [2020-10-12 19:13:57,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:13:57" (1/1) ... [2020-10-12 19:13:57,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:13:58,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:13:58,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:13:58,362 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:13:58,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:13:58,573 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:13:58,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58 WrapperNode [2020-10-12 19:13:58,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:13:58,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:13:58,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:13:58,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:13:58,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (1/1) ... [2020-10-12 19:13:58,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:13:58,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:13:58,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:13:58,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:13:58,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (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 [2020-10-12 19:13:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:13:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:13:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:13:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:13:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:13:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:13:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:13:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:13:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:13:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:13:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:13:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:13:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:13:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:13:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:13:59,429 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:13:59,430 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:13:59,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:13:59 BoogieIcfgContainer [2020-10-12 19:13:59,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:13:59,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:13:59,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:13:59,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:13:59,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:13:57" (1/3) ... [2020-10-12 19:13:59,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a0e7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:13:59, skipping insertion in model container [2020-10-12 19:13:59,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:13:58" (2/3) ... [2020-10-12 19:13:59,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a0e7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:13:59, skipping insertion in model container [2020-10-12 19:13:59,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:13:59" (3/3) ... [2020-10-12 19:13:59,443 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:13:59,454 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:13:59,463 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:13:59,477 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:13:59,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:13:59,500 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:13:59,500 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:13:59,500 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:13:59,500 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:13:59,500 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:13:59,501 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:13:59,501 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:13:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-12 19:13:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:13:59,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:59,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:59,533 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-12 19:13:59,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:59,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117296635] [2020-10-12 19:13:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:00,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:00,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:02,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:02,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:14:02,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:14:02,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-12 19:14:02,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:02,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:14:02,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:14:02,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:14:02,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:14:02,502 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:02,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:02,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:02,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:02,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:02,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:02,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 19:14:02,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:02,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:02,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:02,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:14:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:02,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117296635] [2020-10-12 19:14:02,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:02,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:14:02,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922431151] [2020-10-12 19:14:02,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:14:02,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:14:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:14:02,630 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 6 states. [2020-10-12 19:14:03,090 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-12 19:14:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:04,138 INFO L93 Difference]: Finished difference Result 659 states and 1106 transitions. [2020-10-12 19:14:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:14:04,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 19:14:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:04,160 INFO L225 Difference]: With dead ends: 659 [2020-10-12 19:14:04,160 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 19:14:04,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:14:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 19:14:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 222. [2020-10-12 19:14:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 19:14:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 353 transitions. [2020-10-12 19:14:04,236 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 353 transitions. Word has length 60 [2020-10-12 19:14:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:04,237 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 353 transitions. [2020-10-12 19:14:04,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:14:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 353 transitions. [2020-10-12 19:14:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:14:04,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:04,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:04,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:14:04,241 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1643393529, now seen corresponding path program 1 times [2020-10-12 19:14:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:04,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328613507] [2020-10-12 19:14:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:04,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:04,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:04,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:06,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:06,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:14:06,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:14:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2614 [2020-10-12 19:14:06,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:14:06,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:14:06,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:14:06,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:14:07,191 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:07,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:07,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:07,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:07,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:07,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:07,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:14:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:07,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:07,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:14:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:07,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328613507] [2020-10-12 19:14:07,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:07,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:14:07,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503147854] [2020-10-12 19:14:07,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:14:07,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:14:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:14:07,262 INFO L87 Difference]: Start difference. First operand 222 states and 353 transitions. Second operand 7 states. [2020-10-12 19:14:07,497 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:14:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:09,075 INFO L93 Difference]: Finished difference Result 1378 states and 2286 transitions. [2020-10-12 19:14:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:09,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-12 19:14:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:09,087 INFO L225 Difference]: With dead ends: 1378 [2020-10-12 19:14:09,088 INFO L226 Difference]: Without dead ends: 1214 [2020-10-12 19:14:09,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2020-10-12 19:14:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 645. [2020-10-12 19:14:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-12 19:14:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1062 transitions. [2020-10-12 19:14:09,230 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1062 transitions. Word has length 61 [2020-10-12 19:14:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:09,231 INFO L479 AbstractCegarLoop]: Abstraction has 645 states and 1062 transitions. [2020-10-12 19:14:09,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:14:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1062 transitions. [2020-10-12 19:14:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:14:09,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:09,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:09,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:14:09,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:09,246 INFO L82 PathProgramCache]: Analyzing trace with hash 537355724, now seen corresponding path program 1 times [2020-10-12 19:14:09,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:09,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013149756] [2020-10-12 19:14:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:09,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:10,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:11,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:11,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:14:11,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:14:11,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2230 [2020-10-12 19:14:11,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:14:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:14:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 19:14:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:11,829 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:11,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:11,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:11,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:11,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:14:11,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:11,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:11,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:11,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:14:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:11,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013149756] [2020-10-12 19:14:11,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:11,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:14:11,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160541898] [2020-10-12 19:14:11,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:14:11,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:11,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:14:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:14:11,907 INFO L87 Difference]: Start difference. First operand 645 states and 1062 transitions. Second operand 7 states. [2020-10-12 19:14:12,296 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:14:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:13,707 INFO L93 Difference]: Finished difference Result 3961 states and 6593 transitions. [2020-10-12 19:14:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:13,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-12 19:14:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:13,731 INFO L225 Difference]: With dead ends: 3961 [2020-10-12 19:14:13,732 INFO L226 Difference]: Without dead ends: 3426 [2020-10-12 19:14:13,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2020-10-12 19:14:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1851. [2020-10-12 19:14:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1851 states. [2020-10-12 19:14:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3069 transitions. [2020-10-12 19:14:13,922 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3069 transitions. Word has length 62 [2020-10-12 19:14:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:13,923 INFO L479 AbstractCegarLoop]: Abstraction has 1851 states and 3069 transitions. [2020-10-12 19:14:13,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:14:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3069 transitions. [2020-10-12 19:14:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:14:13,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:13,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:13,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:14:13,926 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:13,926 INFO L82 PathProgramCache]: Analyzing trace with hash -574336146, now seen corresponding path program 1 times [2020-10-12 19:14:13,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:13,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306541133] [2020-10-12 19:14:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:14,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:14,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:16,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:16,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:14:16,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:14:16,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2070 [2020-10-12 19:14:16,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:14:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:14:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:14:16,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:16,266 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:16,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:16,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:16,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:16,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:16,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:14:16,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:16,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:16,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306541133] [2020-10-12 19:14:16,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:16,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:14:16,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075621681] [2020-10-12 19:14:16,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:14:16,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:16,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:14:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:14:16,301 INFO L87 Difference]: Start difference. First operand 1851 states and 3069 transitions. Second operand 7 states. [2020-10-12 19:14:16,596 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:14:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:18,283 INFO L93 Difference]: Finished difference Result 11254 states and 18688 transitions. [2020-10-12 19:14:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:18,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-12 19:14:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:18,332 INFO L225 Difference]: With dead ends: 11254 [2020-10-12 19:14:18,333 INFO L226 Difference]: Without dead ends: 9555 [2020-10-12 19:14:18,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2020-10-12 19:14:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 5170. [2020-10-12 19:14:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5170 states. [2020-10-12 19:14:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 8561 transitions. [2020-10-12 19:14:18,795 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 8561 transitions. Word has length 63 [2020-10-12 19:14:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:18,795 INFO L479 AbstractCegarLoop]: Abstraction has 5170 states and 8561 transitions. [2020-10-12 19:14:18,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:14:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 8561 transitions. [2020-10-12 19:14:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:14:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:18,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:18,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:14:18,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash 224317013, now seen corresponding path program 1 times [2020-10-12 19:14:18,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:18,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522876057] [2020-10-12 19:14:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:18,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:18,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:19,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:21,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:23,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:23,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:14:23,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:14:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 19:14:23,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:14:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:14:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:14:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:24,043 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:24,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:24,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:24,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:24,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 19:14:24,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:24,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:24,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:24,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:24,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:24,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522876057] [2020-10-12 19:14:24,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:24,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:14:24,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221309379] [2020-10-12 19:14:24,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:14:24,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:14:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:14:24,102 INFO L87 Difference]: Start difference. First operand 5170 states and 8561 transitions. Second operand 6 states. [2020-10-12 19:14:24,343 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:14:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:26,090 INFO L93 Difference]: Finished difference Result 20130 states and 33353 transitions. [2020-10-12 19:14:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:14:26,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:14:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:26,154 INFO L225 Difference]: With dead ends: 20130 [2020-10-12 19:14:26,155 INFO L226 Difference]: Without dead ends: 15113 [2020-10-12 19:14:26,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:14:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15113 states. [2020-10-12 19:14:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15113 to 9858. [2020-10-12 19:14:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9858 states. [2020-10-12 19:14:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 16293 transitions. [2020-10-12 19:14:26,916 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 16293 transitions. Word has length 65 [2020-10-12 19:14:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:26,916 INFO L479 AbstractCegarLoop]: Abstraction has 9858 states and 16293 transitions. [2020-10-12 19:14:26,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:14:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 16293 transitions. [2020-10-12 19:14:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:14:26,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:26,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:26,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:14:26,919 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 624109630, now seen corresponding path program 1 times [2020-10-12 19:14:26,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:26,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93649478] [2020-10-12 19:14:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:26,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:27,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:27,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:28,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:28,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:14:28,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:14:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-12 19:14:28,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:14:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:14:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:14:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:14:28,415 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:28,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:28,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:14:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:28,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93649478] [2020-10-12 19:14:28,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:28,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:14:28,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833350853] [2020-10-12 19:14:28,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:14:28,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:28,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:14:28,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:14:28,467 INFO L87 Difference]: Start difference. First operand 9858 states and 16293 transitions. Second operand 6 states. [2020-10-12 19:14:28,807 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:14:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:30,585 INFO L93 Difference]: Finished difference Result 31208 states and 51585 transitions. [2020-10-12 19:14:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:14:30,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:14:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:30,641 INFO L225 Difference]: With dead ends: 31208 [2020-10-12 19:14:30,641 INFO L226 Difference]: Without dead ends: 21503 [2020-10-12 19:14:30,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:14:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21503 states. [2020-10-12 19:14:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21503 to 9858. [2020-10-12 19:14:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9858 states. [2020-10-12 19:14:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 16277 transitions. [2020-10-12 19:14:31,442 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 16277 transitions. Word has length 65 [2020-10-12 19:14:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:31,442 INFO L479 AbstractCegarLoop]: Abstraction has 9858 states and 16277 transitions. [2020-10-12 19:14:31,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:14:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 16277 transitions. [2020-10-12 19:14:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:14:31,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:31,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:31,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:14:31,444 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash -280562700, now seen corresponding path program 1 times [2020-10-12 19:14:31,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:31,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133333129] [2020-10-12 19:14:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:31,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:31,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:36,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:36,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:14:36,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:14:36,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 19:14:36,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:14:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:14:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:14:36,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:14:36,722 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:36,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:36,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:36,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:36,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:36,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:36,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:14:36,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:36,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:36,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:36,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133333129] [2020-10-12 19:14:36,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:36,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:14:36,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790612194] [2020-10-12 19:14:36,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:14:36,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:14:36,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:14:36,759 INFO L87 Difference]: Start difference. First operand 9858 states and 16277 transitions. Second operand 6 states. [2020-10-12 19:14:36,950 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:14:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:38,578 INFO L93 Difference]: Finished difference Result 26804 states and 44228 transitions. [2020-10-12 19:14:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:14:38,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:14:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:38,619 INFO L225 Difference]: With dead ends: 26804 [2020-10-12 19:14:38,619 INFO L226 Difference]: Without dead ends: 21105 [2020-10-12 19:14:38,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:14:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2020-10-12 19:14:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 15810. [2020-10-12 19:14:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15810 states. [2020-10-12 19:14:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 26091 transitions. [2020-10-12 19:14:39,497 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 26091 transitions. Word has length 65 [2020-10-12 19:14:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:39,497 INFO L479 AbstractCegarLoop]: Abstraction has 15810 states and 26091 transitions. [2020-10-12 19:14:39,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:14:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 26091 transitions. [2020-10-12 19:14:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:14:39,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:39,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:39,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:14:39,499 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1743105731, now seen corresponding path program 1 times [2020-10-12 19:14:39,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:39,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869146626] [2020-10-12 19:14:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:44,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:44,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:14:44,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:14:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:14:44,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:14:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:14:44,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:14:44,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:45,623 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:45,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:45,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:45,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:45,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:45,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:45,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:14:45,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:14:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:45,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869146626] [2020-10-12 19:14:45,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:45,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:14:45,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347123541] [2020-10-12 19:14:45,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:14:45,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:14:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:14:45,675 INFO L87 Difference]: Start difference. First operand 15810 states and 26091 transitions. Second operand 6 states. [2020-10-12 19:14:45,975 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:14:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:48,073 INFO L93 Difference]: Finished difference Result 31350 states and 51708 transitions. [2020-10-12 19:14:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:14:48,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:14:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:48,126 INFO L225 Difference]: With dead ends: 31350 [2020-10-12 19:14:48,126 INFO L226 Difference]: Without dead ends: 25651 [2020-10-12 19:14:48,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:14:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25651 states. [2020-10-12 19:14:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25651 to 19902. [2020-10-12 19:14:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19902 states. [2020-10-12 19:14:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 32851 transitions. [2020-10-12 19:14:49,316 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 32851 transitions. Word has length 65 [2020-10-12 19:14:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:49,316 INFO L479 AbstractCegarLoop]: Abstraction has 19902 states and 32851 transitions. [2020-10-12 19:14:49,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:14:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 32851 transitions. [2020-10-12 19:14:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:14:49,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:49,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:49,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:14:49,319 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1697717641, now seen corresponding path program 1 times [2020-10-12 19:14:49,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:49,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211564301] [2020-10-12 19:14:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:49,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:49,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:49,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:51,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:54,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:54,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:14:54,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:54,552 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:54,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:54,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:54,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:54,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:54,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:14:54,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:14:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:54,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211564301] [2020-10-12 19:14:54,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:54,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:14:54,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854855708] [2020-10-12 19:14:54,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:14:54,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:14:54,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:14:54,602 INFO L87 Difference]: Start difference. First operand 19902 states and 32851 transitions. Second operand 7 states. [2020-10-12 19:14:54,897 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:14:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:58,033 INFO L93 Difference]: Finished difference Result 41548 states and 68600 transitions. [2020-10-12 19:14:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:58,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-12 19:14:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:58,085 INFO L225 Difference]: With dead ends: 41548 [2020-10-12 19:14:58,085 INFO L226 Difference]: Without dead ends: 31843 [2020-10-12 19:14:58,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31843 states. [2020-10-12 19:14:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31843 to 25038. [2020-10-12 19:14:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25038 states. [2020-10-12 19:14:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 41342 transitions. [2020-10-12 19:14:59,799 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 41342 transitions. Word has length 66 [2020-10-12 19:14:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:59,799 INFO L479 AbstractCegarLoop]: Abstraction has 25038 states and 41342 transitions. [2020-10-12 19:14:59,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:14:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 41342 transitions. [2020-10-12 19:14:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:14:59,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:59,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:59,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:14:59,801 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash 926195294, now seen corresponding path program 1 times [2020-10-12 19:14:59,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:59,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499175121] [2020-10-12 19:14:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:59,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:59,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:59,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:00,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:00,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:00,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:15:00,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:00,392 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:15:00,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:15:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:00,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:00,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:00,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:15:00,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:15:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:15:00,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:00,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:15:00,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:15:00,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:15:00,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:15:00,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499175121] [2020-10-12 19:15:00,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:15:00,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:15:00,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328786813] [2020-10-12 19:15:00,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:15:00,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:15:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:15:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:15:00,424 INFO L87 Difference]: Start difference. First operand 25038 states and 41342 transitions. Second operand 4 states. [2020-10-12 19:15:00,594 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-12 19:15:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:15:02,941 INFO L93 Difference]: Finished difference Result 55613 states and 91706 transitions. [2020-10-12 19:15:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:15:02,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-12 19:15:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:15:02,976 INFO L225 Difference]: With dead ends: 55613 [2020-10-12 19:15:02,976 INFO L226 Difference]: Without dead ends: 30646 [2020-10-12 19:15:03,020 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 [2020-10-12 19:15:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30646 states. [2020-10-12 19:15:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30646 to 30562. [2020-10-12 19:15:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30562 states. [2020-10-12 19:15:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30562 states to 30562 states and 50142 transitions. [2020-10-12 19:15:05,850 INFO L78 Accepts]: Start accepts. Automaton has 30562 states and 50142 transitions. Word has length 66 [2020-10-12 19:15:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:15:05,850 INFO L479 AbstractCegarLoop]: Abstraction has 30562 states and 50142 transitions. [2020-10-12 19:15:05,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:15:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 30562 states and 50142 transitions. [2020-10-12 19:15:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:15:05,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:15:05,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:15:05,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:15:05,852 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:15:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:15:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash 917084939, now seen corresponding path program 1 times [2020-10-12 19:15:05,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:15:05,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991976256] [2020-10-12 19:15:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:15:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:05,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:06,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:09,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:10,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:10,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:15:10,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:15:10,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:15:10,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:10,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:15:10,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 19:15:10,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:15:10,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:11,103 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:15:11,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:15:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:11,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:11,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:11,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:15:11,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:15:11,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:15:11,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:15:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:15:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:15:11,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:15:11,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991976256] [2020-10-12 19:15:11,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:15:11,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:15:11,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632552573] [2020-10-12 19:15:11,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:15:11,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:15:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:15:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:15:11,133 INFO L87 Difference]: Start difference. First operand 30562 states and 50142 transitions. Second operand 5 states. [2020-10-12 19:15:11,340 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 19:15:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:15:14,392 INFO L93 Difference]: Finished difference Result 61570 states and 101241 transitions. [2020-10-12 19:15:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:15:14,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:15:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:15:14,441 INFO L225 Difference]: With dead ends: 61570 [2020-10-12 19:15:14,441 INFO L226 Difference]: Without dead ends: 36662 [2020-10-12 19:15:14,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:15:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36662 states. [2020-10-12 19:15:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36662 to 36576. [2020-10-12 19:15:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36576 states. [2020-10-12 19:15:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36576 states to 36576 states and 59698 transitions. [2020-10-12 19:15:16,645 INFO L78 Accepts]: Start accepts. Automaton has 36576 states and 59698 transitions. Word has length 66 [2020-10-12 19:15:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:15:16,645 INFO L479 AbstractCegarLoop]: Abstraction has 36576 states and 59698 transitions. [2020-10-12 19:15:16,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:15:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 36576 states and 59698 transitions. [2020-10-12 19:15:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:15:16,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:15:16,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:15:16,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:15:16,647 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:15:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:15:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash -999633595, now seen corresponding path program 1 times [2020-10-12 19:15:16,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:15:16,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441105465] [2020-10-12 19:15:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:15:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:16,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:16,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:16,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:16,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:17,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:19,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:19,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:21,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:21,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:15:21,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:15:21,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:15:21,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:21,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:15:21,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:15:21,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:15:21,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:21,873 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:15:21,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:15:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:21,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:15:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:15:21,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:15:21,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:15:21,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441105465] [2020-10-12 19:15:21,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:15:21,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:15:21,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108868790] [2020-10-12 19:15:21,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:15:21,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:15:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:15:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:15:21,892 INFO L87 Difference]: Start difference. First operand 36576 states and 59698 transitions. Second operand 7 states. [2020-10-12 19:15:22,102 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:15:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:15:26,573 INFO L93 Difference]: Finished difference Result 69964 states and 113980 transitions. [2020-10-12 19:15:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:15:26,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 19:15:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:15:26,641 INFO L225 Difference]: With dead ends: 69964 [2020-10-12 19:15:26,641 INFO L226 Difference]: Without dead ends: 51726 [2020-10-12 19:15:26,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:15:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51726 states. [2020-10-12 19:15:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51726 to 39278. [2020-10-12 19:15:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39278 states. [2020-10-12 19:15:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39278 states to 39278 states and 64186 transitions. [2020-10-12 19:15:29,196 INFO L78 Accepts]: Start accepts. Automaton has 39278 states and 64186 transitions. Word has length 68 [2020-10-12 19:15:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:15:29,197 INFO L479 AbstractCegarLoop]: Abstraction has 39278 states and 64186 transitions. [2020-10-12 19:15:29,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:15:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 39278 states and 64186 transitions. [2020-10-12 19:15:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:15:29,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:15:29,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:15:29,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:15:29,198 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:15:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:15:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash -653597307, now seen corresponding path program 1 times [2020-10-12 19:15:29,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:15:29,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117413984] [2020-10-12 19:15:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:15:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:29,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:34,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:34,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:34,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:15:34,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:15:34,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 19:15:34,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:15:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:15:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:15:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:15:34,484 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:15:34,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:15:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:34,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:34,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:15:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:15:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:15:34,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:15:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:15:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:15:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:15:34,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117413984] [2020-10-12 19:15:34,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:15:34,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:15:34,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299123851] [2020-10-12 19:15:34,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:15:34,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:15:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:15:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:15:34,508 INFO L87 Difference]: Start difference. First operand 39278 states and 64186 transitions. Second operand 5 states. [2020-10-12 19:15:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:15:41,293 INFO L93 Difference]: Finished difference Result 115149 states and 188255 transitions. [2020-10-12 19:15:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:15:41,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 19:15:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:15:41,398 INFO L225 Difference]: With dead ends: 115149 [2020-10-12 19:15:41,399 INFO L226 Difference]: Without dead ends: 75900 [2020-10-12 19:15:41,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:15:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75900 states. [2020-10-12 19:15:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75900 to 75898. [2020-10-12 19:15:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75898 states. [2020-10-12 19:15:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75898 states to 75898 states and 123043 transitions. [2020-10-12 19:15:48,880 INFO L78 Accepts]: Start accepts. Automaton has 75898 states and 123043 transitions. Word has length 69 [2020-10-12 19:15:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:15:48,881 INFO L479 AbstractCegarLoop]: Abstraction has 75898 states and 123043 transitions. [2020-10-12 19:15:48,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:15:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 75898 states and 123043 transitions. [2020-10-12 19:15:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:15:48,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:15:48,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:15:48,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:15:48,883 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:15:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:15:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1288496379, now seen corresponding path program 1 times [2020-10-12 19:15:48,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:15:48,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189161284] [2020-10-12 19:15:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:15:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:48,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:48,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:48,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:48,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:49,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:49,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:53,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:53,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:53,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:15:53,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:15:53,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:15:53,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:15:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:15:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:15:53,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:54,076 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:15:54,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:15:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:54,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:15:54,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:15:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:15:54,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:15:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:15:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:15:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:15:54,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189161284] [2020-10-12 19:15:54,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:15:54,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:15:54,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281027497] [2020-10-12 19:15:54,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:15:54,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:15:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:15:54,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:15:54,100 INFO L87 Difference]: Start difference. First operand 75898 states and 123043 transitions. Second operand 5 states. [2020-10-12 19:15:54,291 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:16:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:16:01,046 INFO L93 Difference]: Finished difference Result 153566 states and 249142 transitions. [2020-10-12 19:16:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:16:01,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-12 19:16:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:16:01,162 INFO L225 Difference]: With dead ends: 153566 [2020-10-12 19:16:01,162 INFO L226 Difference]: Without dead ends: 81783 [2020-10-12 19:16:01,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:16:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81783 states. [2020-10-12 19:16:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81783 to 76032. [2020-10-12 19:16:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76032 states. [2020-10-12 19:16:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76032 states to 76032 states and 123571 transitions. [2020-10-12 19:16:09,186 INFO L78 Accepts]: Start accepts. Automaton has 76032 states and 123571 transitions. Word has length 70 [2020-10-12 19:16:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:16:09,186 INFO L479 AbstractCegarLoop]: Abstraction has 76032 states and 123571 transitions. [2020-10-12 19:16:09,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:16:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 76032 states and 123571 transitions. [2020-10-12 19:16:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:16:09,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:16:09,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:16:09,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:16:09,188 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:16:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:16:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash -424908683, now seen corresponding path program 1 times [2020-10-12 19:16:09,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:16:09,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208615651] [2020-10-12 19:16:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:16:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:16:09,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:09,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:11,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:14,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:16:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:16:14,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:16:14,399 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:16:14,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:16:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:16:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:14,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:16:14,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:16:14,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:16:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:16:14,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:16:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:16:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:16:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:16:14,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:16:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:16:14,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208615651] [2020-10-12 19:16:14,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:16:14,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:16:14,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925118372] [2020-10-12 19:16:14,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:16:14,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:16:14,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:16:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:16:14,418 INFO L87 Difference]: Start difference. First operand 76032 states and 123571 transitions. Second operand 7 states. [2020-10-12 19:16:14,730 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:16:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:16:24,897 INFO L93 Difference]: Finished difference Result 162264 states and 263408 transitions. [2020-10-12 19:16:24,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:16:24,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 19:16:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:16:25,055 INFO L225 Difference]: With dead ends: 162264 [2020-10-12 19:16:25,055 INFO L226 Difference]: Without dead ends: 121954 [2020-10-12 19:16:25,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:16:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121954 states. [2020-10-12 19:16:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121954 to 93798. [2020-10-12 19:16:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93798 states. [2020-10-12 19:16:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93798 states to 93798 states and 152299 transitions. [2020-10-12 19:16:33,616 INFO L78 Accepts]: Start accepts. Automaton has 93798 states and 152299 transitions. Word has length 71 [2020-10-12 19:16:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:16:33,616 INFO L479 AbstractCegarLoop]: Abstraction has 93798 states and 152299 transitions. [2020-10-12 19:16:33,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:16:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 93798 states and 152299 transitions. [2020-10-12 19:16:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:16:33,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:16:33,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:16:33,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:16:33,618 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:16:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:16:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1297641100, now seen corresponding path program 1 times [2020-10-12 19:16:33,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:16:33,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426926102] [2020-10-12 19:16:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:16:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:16:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:33,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:33,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:34,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:34,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:16:34,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:16:34,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:16:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-12 19:16:34,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:16:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:16:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-12 19:16:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:16:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:16:35,116 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:16:35,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:16:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:16:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:35,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:16:35,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:16:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:16:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:16:35,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426926102] [2020-10-12 19:16:35,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:16:35,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:16:35,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020577917] [2020-10-12 19:16:35,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:16:35,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:16:35,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:16:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:16:35,141 INFO L87 Difference]: Start difference. First operand 93798 states and 152299 transitions. Second operand 6 states. [2020-10-12 19:16:35,372 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:16:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:16:57,923 INFO L93 Difference]: Finished difference Result 331495 states and 538115 transitions. [2020-10-12 19:16:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:16:57,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 19:16:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:16:58,323 INFO L225 Difference]: With dead ends: 331495 [2020-10-12 19:16:58,323 INFO L226 Difference]: Without dead ends: 239179 [2020-10-12 19:16:58,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:16:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239179 states. [2020-10-12 19:17:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239179 to 150372. [2020-10-12 19:17:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150372 states. [2020-10-12 19:17:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150372 states to 150372 states and 243295 transitions. [2020-10-12 19:17:15,580 INFO L78 Accepts]: Start accepts. Automaton has 150372 states and 243295 transitions. Word has length 71 [2020-10-12 19:17:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:17:15,581 INFO L479 AbstractCegarLoop]: Abstraction has 150372 states and 243295 transitions. [2020-10-12 19:17:15,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:17:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 150372 states and 243295 transitions. [2020-10-12 19:17:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:17:15,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:17:15,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:17:15,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:17:15,583 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:17:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:17:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1727361225, now seen corresponding path program 1 times [2020-10-12 19:17:15,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:17:15,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895236489] [2020-10-12 19:17:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:17:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:17:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:16,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:20,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:17:20,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:17:20,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:17:20,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:17:20,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:17:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:17:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:17:20,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:17:20,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:17:20,810 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:17:20,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:17:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:17:20,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:17:20,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:17:20,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:17:20,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:17:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:17:20,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:17:20,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:17:20,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:17:20,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:17:20,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:17:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:17:20,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895236489] [2020-10-12 19:17:20,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:17:20,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:17:20,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027330560] [2020-10-12 19:17:20,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:17:20,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:17:20,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:17:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:17:20,840 INFO L87 Difference]: Start difference. First operand 150372 states and 243295 transitions. Second operand 5 states.