/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:29:44,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:29:44,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:29:44,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:29:44,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:29:44,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:29:44,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:29:44,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:29:44,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:29:44,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:29:44,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:29:44,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:29:44,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:29:44,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:29:44,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:29:44,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:29:44,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:29:44,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:29:44,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:29:44,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:29:44,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:29:44,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:29:44,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:29:44,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:29:44,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:29:44,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:29:44,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:29:44,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:29:44,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:29:44,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:29:44,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:29:44,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:29:44,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:29:44,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:29:44,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:29:44,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:29:44,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:29:44,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:29:44,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:29:44,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:29:44,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:29:44,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:29:44,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:29:44,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:29:44,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:29:44,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:29:44,717 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:29:44,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:29:44,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:29:44,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:29:44,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:29:44,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:29:44,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:29:44,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:29:44,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:29:44,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:29:44,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:29:44,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:29:44,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:29:44,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:29:44,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:29:44,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:29:44,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:29:44,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:29:44,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:29:44,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:29:44,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:29:44,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:29:44,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:29:44,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:29:44,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:29:44,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:29:45,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:29:45,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:29:45,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:29:45,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:29:45,044 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:29:45,045 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-13 14:29:45,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3afbefc2/5e7735e5a30c4e95ae415cfbfe8b246c/FLAGc282584be [2020-10-13 14:29:45,536 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:29:45,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-13 14:29:45,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3afbefc2/5e7735e5a30c4e95ae415cfbfe8b246c/FLAGc282584be [2020-10-13 14:29:45,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3afbefc2/5e7735e5a30c4e95ae415cfbfe8b246c [2020-10-13 14:29:45,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:29:45,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:29:45,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:29:45,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:29:45,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:29:45,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:29:45" (1/1) ... [2020-10-13 14:29:45,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:45, skipping insertion in model container [2020-10-13 14:29:45,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:29:45" (1/1) ... [2020-10-13 14:29:45,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:29:46,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:29:46,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:29:46,408 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:29:46,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:29:46,540 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:29:46,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46 WrapperNode [2020-10-13 14:29:46,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:29:46,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:29:46,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:29:46,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:29:46,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... [2020-10-13 14:29:46,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:29:46,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:29:46,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:29:46,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:29:46,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:29:46,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:29:46,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:29:46,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:29:46,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:29:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:29:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:29:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:29:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:29:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:29:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:29:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:29:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:29:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:29:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:29:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:29:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:29:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:29:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-13 14:29:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-13 14:29:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-13 14:29:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:29:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:29:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:29:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:29:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:29:47,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:29:47,499 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:29:47,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:29:47 BoogieIcfgContainer [2020-10-13 14:29:47,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:29:47,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:29:47,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:29:47,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:29:47,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:29:45" (1/3) ... [2020-10-13 14:29:47,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8ea214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:29:47, skipping insertion in model container [2020-10-13 14:29:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:29:46" (2/3) ... [2020-10-13 14:29:47,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8ea214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:29:47, skipping insertion in model container [2020-10-13 14:29:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:29:47" (3/3) ... [2020-10-13 14:29:47,513 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-13 14:29:47,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:29:47,531 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:29:47,546 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:29:47,571 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:29:47,571 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:29:47,572 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:29:47,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:29:47,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:29:47,572 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:29:47,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:29:47,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:29:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2020-10-13 14:29:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 14:29:47,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:29:47,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:29:47,610 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:29:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:29:47,617 INFO L82 PathProgramCache]: Analyzing trace with hash 351638092, now seen corresponding path program 1 times [2020-10-13 14:29:47,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:29:47,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859687102] [2020-10-13 14:29:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:29:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:29:48,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:48,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:53,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:29:53,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 14:29:53,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:29:53,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:29:53,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:29:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:29:53,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:29:53,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:29:53,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:29:53,419 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:29:53,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:29:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:29:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:53,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:29:53,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:29:53,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:29:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:29:53,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:29:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:29:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:29:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:29:53,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:29:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:29:53,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859687102] [2020-10-13 14:29:53,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:29:53,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:29:53,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959408132] [2020-10-13 14:29:53,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:29:53,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:29:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:29:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:29:53,538 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 4 states. [2020-10-13 14:29:53,907 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:29:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:29:54,930 INFO L93 Difference]: Finished difference Result 342 states and 561 transitions. [2020-10-13 14:29:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:29:54,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-13 14:29:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:29:54,947 INFO L225 Difference]: With dead ends: 342 [2020-10-13 14:29:54,947 INFO L226 Difference]: Without dead ends: 240 [2020-10-13 14:29:54,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:29:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-13 14:29:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-10-13 14:29:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 14:29:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 339 transitions. [2020-10-13 14:29:55,019 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 339 transitions. Word has length 105 [2020-10-13 14:29:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:29:55,019 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 339 transitions. [2020-10-13 14:29:55,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:29:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 339 transitions. [2020-10-13 14:29:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:29:55,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:29:55,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:29:55,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:29:55,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:29:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:29:55,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1713346286, now seen corresponding path program 1 times [2020-10-13 14:29:55,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:29:55,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099296620] [2020-10-13 14:29:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:29:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:29:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:55,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:55,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:55,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:29:58,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:00,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:00,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:30:00,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:30:00,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:30:00,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:30:00,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:30:00,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 14:30:00,553 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:00,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:00,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:00,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:00,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:30:00,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:30:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099296620] [2020-10-13 14:30:00,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:00,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:00,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799953977] [2020-10-13 14:30:00,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:00,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:00,679 INFO L87 Difference]: Start difference. First operand 238 states and 339 transitions. Second operand 4 states. [2020-10-13 14:30:00,958 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:01,744 INFO L93 Difference]: Finished difference Result 562 states and 855 transitions. [2020-10-13 14:30:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:01,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-13 14:30:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:01,749 INFO L225 Difference]: With dead ends: 562 [2020-10-13 14:30:01,749 INFO L226 Difference]: Without dead ends: 392 [2020-10-13 14:30:01,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-13 14:30:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 390. [2020-10-13 14:30:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-13 14:30:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 581 transitions. [2020-10-13 14:30:01,779 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 581 transitions. Word has length 106 [2020-10-13 14:30:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:01,780 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 581 transitions. [2020-10-13 14:30:01,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 581 transitions. [2020-10-13 14:30:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:30:01,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:01,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:01,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:30:01,783 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1168835482, now seen corresponding path program 1 times [2020-10-13 14:30:01,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:01,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626311245] [2020-10-13 14:30:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:01,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:02,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:02,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:06,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:06,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:06,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:30:06,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:30:06,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 14:30:06,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:30:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:30:06,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:07,124 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:07,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:07,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:07,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:07,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:07,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:30:07,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:07,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:07,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:07,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:07,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:07,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626311245] [2020-10-13 14:30:07,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:07,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:07,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263788731] [2020-10-13 14:30:07,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:07,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:07,194 INFO L87 Difference]: Start difference. First operand 390 states and 581 transitions. Second operand 4 states. [2020-10-13 14:30:07,472 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:08,295 INFO L93 Difference]: Finished difference Result 1002 states and 1555 transitions. [2020-10-13 14:30:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:08,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-13 14:30:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:08,301 INFO L225 Difference]: With dead ends: 1002 [2020-10-13 14:30:08,301 INFO L226 Difference]: Without dead ends: 680 [2020-10-13 14:30:08,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-10-13 14:30:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 678. [2020-10-13 14:30:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-10-13 14:30:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1037 transitions. [2020-10-13 14:30:08,338 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1037 transitions. Word has length 107 [2020-10-13 14:30:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:08,338 INFO L479 AbstractCegarLoop]: Abstraction has 678 states and 1037 transitions. [2020-10-13 14:30:08,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1037 transitions. [2020-10-13 14:30:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:30:08,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:08,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:08,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:30:08,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:08,342 INFO L82 PathProgramCache]: Analyzing trace with hash 787302006, now seen corresponding path program 1 times [2020-10-13 14:30:08,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:08,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720808661] [2020-10-13 14:30:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:08,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:08,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:08,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:08,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:10,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:10,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:13,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:30:13,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:30:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:30:13,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:30:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:30:13,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:13,758 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:13,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:13,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:13,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:30:13,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:30:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:13,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720808661] [2020-10-13 14:30:13,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:13,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:13,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374667210] [2020-10-13 14:30:13,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:13,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:13,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:13,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:13,826 INFO L87 Difference]: Start difference. First operand 678 states and 1037 transitions. Second operand 4 states. [2020-10-13 14:30:14,079 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:14,924 INFO L93 Difference]: Finished difference Result 1834 states and 2871 transitions. [2020-10-13 14:30:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:14,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-13 14:30:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:14,932 INFO L225 Difference]: With dead ends: 1834 [2020-10-13 14:30:14,933 INFO L226 Difference]: Without dead ends: 1224 [2020-10-13 14:30:14,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2020-10-13 14:30:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1222. [2020-10-13 14:30:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1222 states. [2020-10-13 14:30:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1893 transitions. [2020-10-13 14:30:14,986 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1893 transitions. Word has length 108 [2020-10-13 14:30:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:14,987 INFO L479 AbstractCegarLoop]: Abstraction has 1222 states and 1893 transitions. [2020-10-13 14:30:14,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1893 transitions. [2020-10-13 14:30:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:30:14,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:14,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:14,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:30:14,989 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:14,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2068649104, now seen corresponding path program 1 times [2020-10-13 14:30:14,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:14,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957305914] [2020-10-13 14:30:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:15,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:15,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:16,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:19,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:19,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:20,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:20,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:30:20,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:30:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:30:20,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:30:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 14:30:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:20,371 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:20,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:20,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:20,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:20,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:20,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:30:20,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:20,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:20,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:20,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:20,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:30:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:20,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957305914] [2020-10-13 14:30:20,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:20,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:20,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110063260] [2020-10-13 14:30:20,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:20,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:20,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:20,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:20,444 INFO L87 Difference]: Start difference. First operand 1222 states and 1893 transitions. Second operand 4 states. [2020-10-13 14:30:20,820 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:21,629 INFO L93 Difference]: Finished difference Result 3402 states and 5335 transitions. [2020-10-13 14:30:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:21,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-13 14:30:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:21,645 INFO L225 Difference]: With dead ends: 3402 [2020-10-13 14:30:21,645 INFO L226 Difference]: Without dead ends: 2248 [2020-10-13 14:30:21,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2020-10-13 14:30:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2246. [2020-10-13 14:30:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2020-10-13 14:30:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 3493 transitions. [2020-10-13 14:30:21,766 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 3493 transitions. Word has length 109 [2020-10-13 14:30:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:21,767 INFO L479 AbstractCegarLoop]: Abstraction has 2246 states and 3493 transitions. [2020-10-13 14:30:21,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 3493 transitions. [2020-10-13 14:30:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 14:30:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:21,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:21,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:30:21,769 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1809792992, now seen corresponding path program 1 times [2020-10-13 14:30:21,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:21,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630135749] [2020-10-13 14:30:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:21,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:21,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:21,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:24,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:26,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:26,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 14:30:26,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:30:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:30:26,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:30:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 14:30:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:27,098 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:27,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:27,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:27,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:27,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:27,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:30:27,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:27,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:27,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:27,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630135749] [2020-10-13 14:30:27,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:27,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:27,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279829187] [2020-10-13 14:30:27,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:27,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:27,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:27,152 INFO L87 Difference]: Start difference. First operand 2246 states and 3493 transitions. Second operand 4 states. [2020-10-13 14:30:27,406 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:28,382 INFO L93 Difference]: Finished difference Result 6346 states and 9927 transitions. [2020-10-13 14:30:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:28,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-13 14:30:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:28,404 INFO L225 Difference]: With dead ends: 6346 [2020-10-13 14:30:28,405 INFO L226 Difference]: Without dead ends: 4168 [2020-10-13 14:30:28,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2020-10-13 14:30:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 4166. [2020-10-13 14:30:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4166 states. [2020-10-13 14:30:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 6469 transitions. [2020-10-13 14:30:28,681 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 6469 transitions. Word has length 110 [2020-10-13 14:30:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:28,681 INFO L479 AbstractCegarLoop]: Abstraction has 4166 states and 6469 transitions. [2020-10-13 14:30:28,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 6469 transitions. [2020-10-13 14:30:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:30:28,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:28,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:28,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:30:28,685 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:28,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1157573194, now seen corresponding path program 1 times [2020-10-13 14:30:28,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:28,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375529951] [2020-10-13 14:30:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:28,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:28,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:28,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:29,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:33,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:30:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 14:30:33,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:33,974 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:33,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:33,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:33,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:33,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:33,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:30:33,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:33,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:34,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375529951] [2020-10-13 14:30:34,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:34,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:34,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077727685] [2020-10-13 14:30:34,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:34,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:34,024 INFO L87 Difference]: Start difference. First operand 4166 states and 6469 transitions. Second operand 4 states. [2020-10-13 14:30:34,242 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:35,242 INFO L93 Difference]: Finished difference Result 11850 states and 18439 transitions. [2020-10-13 14:30:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:35,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 14:30:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:35,281 INFO L225 Difference]: With dead ends: 11850 [2020-10-13 14:30:35,281 INFO L226 Difference]: Without dead ends: 7752 [2020-10-13 14:30:35,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7752 states. [2020-10-13 14:30:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7752 to 7750. [2020-10-13 14:30:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7750 states. [2020-10-13 14:30:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 11973 transitions. [2020-10-13 14:30:35,610 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 11973 transitions. Word has length 111 [2020-10-13 14:30:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:35,610 INFO L479 AbstractCegarLoop]: Abstraction has 7750 states and 11973 transitions. [2020-10-13 14:30:35,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 11973 transitions. [2020-10-13 14:30:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:30:35,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:35,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:35,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:30:35,612 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 257850850, now seen corresponding path program 1 times [2020-10-13 14:30:35,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:35,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625114801] [2020-10-13 14:30:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:35,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:35,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:35,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:35,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:35,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:40,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:30:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:30:40,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:40,881 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:40,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:40,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:40,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625114801] [2020-10-13 14:30:40,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:40,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:30:40,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849271940] [2020-10-13 14:30:40,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:30:40,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:30:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:30:40,922 INFO L87 Difference]: Start difference. First operand 7750 states and 11973 transitions. Second operand 4 states. [2020-10-13 14:30:41,165 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:42,172 INFO L93 Difference]: Finished difference Result 22090 states and 34119 transitions. [2020-10-13 14:30:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:30:42,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-13 14:30:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:42,228 INFO L225 Difference]: With dead ends: 22090 [2020-10-13 14:30:42,229 INFO L226 Difference]: Without dead ends: 14408 [2020-10-13 14:30:42,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:30:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14408 states. [2020-10-13 14:30:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14408 to 14406. [2020-10-13 14:30:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14406 states. [2020-10-13 14:30:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14406 states to 14406 states and 22085 transitions. [2020-10-13 14:30:42,831 INFO L78 Accepts]: Start accepts. Automaton has 14406 states and 22085 transitions. Word has length 112 [2020-10-13 14:30:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:42,831 INFO L479 AbstractCegarLoop]: Abstraction has 14406 states and 22085 transitions. [2020-10-13 14:30:42,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:30:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14406 states and 22085 transitions. [2020-10-13 14:30:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:30:42,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:42,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:42,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:30:42,833 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1092403889, now seen corresponding path program 1 times [2020-10-13 14:30:42,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:42,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845338957] [2020-10-13 14:30:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:42,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:43,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:44,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:30:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:30:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 14:30:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:48,117 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:30:48,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:30:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:48,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:30:48,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:30:48,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:30:48,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:30:48,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:30:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:30:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:30:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:30:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:30:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:30:48,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845338957] [2020-10-13 14:30:48,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:30:48,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:30:48,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892583181] [2020-10-13 14:30:48,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:30:48,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:30:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:30:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:30:48,160 INFO L87 Difference]: Start difference. First operand 14406 states and 22085 transitions. Second operand 7 states. [2020-10-13 14:30:48,413 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:30:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:30:52,782 INFO L93 Difference]: Finished difference Result 128726 states and 197453 transitions. [2020-10-13 14:30:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:30:52,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:30:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:30:53,074 INFO L225 Difference]: With dead ends: 128726 [2020-10-13 14:30:53,075 INFO L226 Difference]: Without dead ends: 114388 [2020-10-13 14:30:53,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:30:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114388 states. [2020-10-13 14:30:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114388 to 42822. [2020-10-13 14:30:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42822 states. [2020-10-13 14:30:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42822 states to 42822 states and 65477 transitions. [2020-10-13 14:30:55,680 INFO L78 Accepts]: Start accepts. Automaton has 42822 states and 65477 transitions. Word has length 113 [2020-10-13 14:30:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:30:55,680 INFO L479 AbstractCegarLoop]: Abstraction has 42822 states and 65477 transitions. [2020-10-13 14:30:55,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:30:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 42822 states and 65477 transitions. [2020-10-13 14:30:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:30:55,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:30:55,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:30:55,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:30:55,682 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:30:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:30:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 628926986, now seen corresponding path program 1 times [2020-10-13 14:30:55,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:30:55,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809700818] [2020-10-13 14:30:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:30:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:30:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:55,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:55,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:56,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:30:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:00,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:00,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:31:00,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:31:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:31:00,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:31:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:31:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 14:31:00,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:01,015 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:31:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:01,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:01,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:01,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:01,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:01,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:31:01,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:01,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:31:01,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:01,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:31:01,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:31:01,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809700818] [2020-10-13 14:31:01,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:01,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:31:01,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009798930] [2020-10-13 14:31:01,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:31:01,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:01,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:31:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:31:01,090 INFO L87 Difference]: Start difference. First operand 42822 states and 65477 transitions. Second operand 6 states. [2020-10-13 14:31:01,347 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-13 14:31:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:31:04,327 INFO L93 Difference]: Finished difference Result 99658 states and 152263 transitions. [2020-10-13 14:31:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:31:04,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-10-13 14:31:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:31:04,489 INFO L225 Difference]: With dead ends: 99658 [2020-10-13 14:31:04,490 INFO L226 Difference]: Without dead ends: 71112 [2020-10-13 14:31:04,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:31:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71112 states. [2020-10-13 14:31:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71112 to 56902. [2020-10-13 14:31:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56902 states. [2020-10-13 14:31:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56902 states to 56902 states and 86597 transitions. [2020-10-13 14:31:08,169 INFO L78 Accepts]: Start accepts. Automaton has 56902 states and 86597 transitions. Word has length 113 [2020-10-13 14:31:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:31:08,169 INFO L479 AbstractCegarLoop]: Abstraction has 56902 states and 86597 transitions. [2020-10-13 14:31:08,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:31:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 56902 states and 86597 transitions. [2020-10-13 14:31:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:31:08,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:08,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:31:08,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:31:08,171 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1196147638, now seen corresponding path program 1 times [2020-10-13 14:31:08,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:08,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475498590] [2020-10-13 14:31:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:08,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:08,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:08,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:08,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:09,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:13,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:13,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:31:13,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:31:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:31:13,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:31:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:31:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 14:31:13,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:13,459 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:31:13,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:13,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:13,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:13,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:13,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:31:13,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:31:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:31:13,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:31:13,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475498590] [2020-10-13 14:31:13,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:13,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:31:13,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390828529] [2020-10-13 14:31:13,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:31:13,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:31:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:31:13,490 INFO L87 Difference]: Start difference. First operand 56902 states and 86597 transitions. Second operand 7 states. [2020-10-13 14:31:13,748 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:31:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:31:32,165 INFO L93 Difference]: Finished difference Result 463525 states and 705184 transitions. [2020-10-13 14:31:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:31:32,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:31:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:31:32,862 INFO L225 Difference]: With dead ends: 463525 [2020-10-13 14:31:32,862 INFO L226 Difference]: Without dead ends: 406691 [2020-10-13 14:31:32,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:31:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406691 states. [2020-10-13 14:31:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406691 to 113237. [2020-10-13 14:31:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113237 states. [2020-10-13 14:31:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113237 states to 113237 states and 171608 transitions. [2020-10-13 14:31:42,486 INFO L78 Accepts]: Start accepts. Automaton has 113237 states and 171608 transitions. Word has length 113 [2020-10-13 14:31:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:31:42,486 INFO L479 AbstractCegarLoop]: Abstraction has 113237 states and 171608 transitions. [2020-10-13 14:31:42,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:31:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 113237 states and 171608 transitions. [2020-10-13 14:31:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:31:42,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:42,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:31:42,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:31:42,488 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:42,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1634748101, now seen corresponding path program 1 times [2020-10-13 14:31:42,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:42,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989821523] [2020-10-13 14:31:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:42,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:42,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:45,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:45,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:47,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:47,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:31:47,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:31:47,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:31:47,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:47,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:31:47,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 14:31:47,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:31:47,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:47,758 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-13 14:31:47,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:47,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:47,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:47,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:47,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:31:47,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:47,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:31:47,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:47,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:31:47,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:31:47,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989821523] [2020-10-13 14:31:47,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:47,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:31:47,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936968419] [2020-10-13 14:31:47,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:31:47,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:31:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:31:47,798 INFO L87 Difference]: Start difference. First operand 113237 states and 171608 transitions. Second operand 7 states. [2020-10-13 14:31:48,049 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-13 14:32:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:38,155 INFO L93 Difference]: Finished difference Result 1015397 states and 1537632 transitions. [2020-10-13 14:32:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:32:38,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:32:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:39,432 INFO L225 Difference]: With dead ends: 1015397 [2020-10-13 14:32:39,432 INFO L226 Difference]: Without dead ends: 902243 [2020-10-13 14:32:39,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:32:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902243 states.