/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.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:21:50,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:21:50,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:21:50,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:21:50,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:21:50,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:21:50,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:21:50,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:21:50,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:21:50,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:21:50,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:21:50,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:21:50,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:21:50,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:21:50,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:21:50,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:21:50,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:21:50,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:21:50,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:21:50,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:21:50,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:21:50,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:21:50,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:21:50,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:21:50,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:21:50,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:21:50,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:21:50,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:21:50,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:21:50,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:21:50,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:21:50,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:21:50,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:21:50,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:21:50,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:21:50,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:21:50,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:21:50,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:21:50,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:21:50,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:21:50,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:21:50,763 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 14:21:50,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:21:50,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:21:50,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:21:50,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:21:50,803 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:21:50,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:21:50,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:21:50,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:21:50,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:21:50,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:21:50,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:21:50,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:21:50,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:21:50,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:21:50,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:21:50,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:21:50,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:21:50,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:21:50,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:21:50,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:21:50,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:21:50,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:21:50,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:21:50,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:21:50,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:21:50,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:21:50,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:21:50,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:21:50,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:21:50,809 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 14:21:51,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:21:51,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:21:51,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:21:51,140 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:21:51,141 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:21:51,141 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-13 14:21:51,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48f9b7f1a/65fad47f29fc47bf87241d8c5dab0904/FLAGaad40bf36 [2020-10-13 14:21:51,721 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:21:51,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-13 14:21:51,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48f9b7f1a/65fad47f29fc47bf87241d8c5dab0904/FLAGaad40bf36 [2020-10-13 14:21:52,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48f9b7f1a/65fad47f29fc47bf87241d8c5dab0904 [2020-10-13 14:21:52,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:21:52,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:21:52,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:21:52,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:21:52,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:21:52,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b7cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52, skipping insertion in model container [2020-10-13 14:21:52,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:21:52,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:21:52,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:21:52,696 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:21:52,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:21:52,877 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:21:52,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52 WrapperNode [2020-10-13 14:21:52,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:21:52,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:21:52,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:21:52,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:21:52,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (1/1) ... [2020-10-13 14:21:52,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:21:52,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:21:52,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:21:52,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:21:52,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (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 14:21:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:21:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:21:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:21:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:21:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:21:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:21:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:21:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:21:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:21:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:21:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:21:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:21:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:21:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:21:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:21:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:21:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:21:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-13 14:21:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:21:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:21:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:21:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:21:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:21:54,004 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:21:54,006 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:21:54,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:21:54 BoogieIcfgContainer [2020-10-13 14:21:54,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:21:54,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:21:54,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:21:54,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:21:54,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:21:52" (1/3) ... [2020-10-13 14:21:54,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee3b1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:21:54, skipping insertion in model container [2020-10-13 14:21:54,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:21:52" (2/3) ... [2020-10-13 14:21:54,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee3b1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:21:54, skipping insertion in model container [2020-10-13 14:21:54,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:21:54" (3/3) ... [2020-10-13 14:21:54,029 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-13 14:21:54,040 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:21:54,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:21:54,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:21:54,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:21:54,089 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:21:54,089 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:21:54,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:21:54,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:21:54,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:21:54,090 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:21:54,090 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:21:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states. [2020-10-13 14:21:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 14:21:54,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:54,123 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] [2020-10-13 14:21:54,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash -541697796, now seen corresponding path program 1 times [2020-10-13 14:21:54,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:54,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081248334] [2020-10-13 14:21:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:54,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:54,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:56,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:56,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:56,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:59,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:59,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 14:21:59,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:21:59,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 14:21:59,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:21:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:21:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:21:59,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:21:59,980 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:21:59,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:00,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:00,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:00,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:00,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:00,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:22:00,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:00,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:00,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:00,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:00,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:00,052 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 14:22:00,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081248334] [2020-10-13 14:22:00,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:00,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:00,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616910214] [2020-10-13 14:22:00,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:00,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:00,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:00,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:00,081 INFO L87 Difference]: Start difference. First operand 183 states. Second operand 7 states. [2020-10-13 14:22:00,423 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:02,216 INFO L93 Difference]: Finished difference Result 874 states and 1408 transitions. [2020-10-13 14:22:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:02,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-13 14:22:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:02,242 INFO L225 Difference]: With dead ends: 874 [2020-10-13 14:22:02,242 INFO L226 Difference]: Without dead ends: 726 [2020-10-13 14:22:02,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:22:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-10-13 14:22:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 361. [2020-10-13 14:22:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-13 14:22:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 528 transitions. [2020-10-13 14:22:02,388 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 528 transitions. Word has length 95 [2020-10-13 14:22:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:02,389 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 528 transitions. [2020-10-13 14:22:02,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 528 transitions. [2020-10-13 14:22:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 14:22:02,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:02,394 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] [2020-10-13 14:22:02,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:22:02,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1357515268, now seen corresponding path program 1 times [2020-10-13 14:22:02,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:02,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414725737] [2020-10-13 14:22:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:06,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:06,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:06,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:07,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:07,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 14:22:07,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:22:07,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:22:07,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:07,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:07,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:22:07,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:22:07,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:22:07,713 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:07,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:07,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:07,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:07,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:07,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:22:07,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:07,753 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 14:22:07,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414725737] [2020-10-13 14:22:07,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:07,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:07,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911397615] [2020-10-13 14:22:07,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:07,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:07,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:07,758 INFO L87 Difference]: Start difference. First operand 361 states and 528 transitions. Second operand 7 states. [2020-10-13 14:22:07,973 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:09,794 INFO L93 Difference]: Finished difference Result 2335 states and 3629 transitions. [2020-10-13 14:22:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:09,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-13 14:22:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:09,814 INFO L225 Difference]: With dead ends: 2335 [2020-10-13 14:22:09,814 INFO L226 Difference]: Without dead ends: 2033 [2020-10-13 14:22:09,822 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 14:22:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2020-10-13 14:22:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 911. [2020-10-13 14:22:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 911 states. [2020-10-13 14:22:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1384 transitions. [2020-10-13 14:22:09,901 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1384 transitions. Word has length 96 [2020-10-13 14:22:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:09,901 INFO L479 AbstractCegarLoop]: Abstraction has 911 states and 1384 transitions. [2020-10-13 14:22:09,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1384 transitions. [2020-10-13 14:22:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:22:09,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:09,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:09,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:22:09,909 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash -139479876, now seen corresponding path program 1 times [2020-10-13 14:22:09,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:09,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387757709] [2020-10-13 14:22:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:14,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:14,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:14,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:14,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:22:14,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:22:14,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:22:14,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 14:22:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:22:14,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:15,167 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:15,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:15,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:15,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:15,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:15,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:22:15,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:15,204 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 14:22:15,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387757709] [2020-10-13 14:22:15,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:15,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:15,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183092195] [2020-10-13 14:22:15,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:15,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:15,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:15,207 INFO L87 Difference]: Start difference. First operand 911 states and 1384 transitions. Second operand 7 states. [2020-10-13 14:22:15,396 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:16,745 INFO L93 Difference]: Finished difference Result 4922 states and 7699 transitions. [2020-10-13 14:22:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:16,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-13 14:22:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:16,776 INFO L225 Difference]: With dead ends: 4922 [2020-10-13 14:22:16,776 INFO L226 Difference]: Without dead ends: 4407 [2020-10-13 14:22:16,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:22:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2020-10-13 14:22:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 1650. [2020-10-13 14:22:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1650 states. [2020-10-13 14:22:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2531 transitions. [2020-10-13 14:22:16,915 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2531 transitions. Word has length 97 [2020-10-13 14:22:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:16,916 INFO L479 AbstractCegarLoop]: Abstraction has 1650 states and 2531 transitions. [2020-10-13 14:22:16,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2531 transitions. [2020-10-13 14:22:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:22:16,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:16,920 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] [2020-10-13 14:22:16,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:22:16,921 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1321274571, now seen corresponding path program 1 times [2020-10-13 14:22:16,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:16,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971989759] [2020-10-13 14:22:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:16,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:17,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:17,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:17,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:17,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:21,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:21,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:22:21,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:22:21,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:22:21,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:22:21,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:22:21,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:22,206 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:22,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:22,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:22,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:22,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:22,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:22:22,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:22,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:22,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:22:22,267 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 14:22:22,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971989759] [2020-10-13 14:22:22,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:22,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:22,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971833619] [2020-10-13 14:22:22,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:22,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:22,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:22,271 INFO L87 Difference]: Start difference. First operand 1650 states and 2531 transitions. Second operand 7 states. [2020-10-13 14:22:22,525 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:24,784 INFO L93 Difference]: Finished difference Result 7722 states and 12077 transitions. [2020-10-13 14:22:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:24,784 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-13 14:22:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:24,835 INFO L225 Difference]: With dead ends: 7722 [2020-10-13 14:22:24,836 INFO L226 Difference]: Without dead ends: 6764 [2020-10-13 14:22:24,842 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 14:22:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6764 states. [2020-10-13 14:22:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6764 to 2190. [2020-10-13 14:22:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2190 states. [2020-10-13 14:22:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3356 transitions. [2020-10-13 14:22:25,047 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3356 transitions. Word has length 97 [2020-10-13 14:22:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:25,070 INFO L479 AbstractCegarLoop]: Abstraction has 2190 states and 3356 transitions. [2020-10-13 14:22:25,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3356 transitions. [2020-10-13 14:22:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:22:25,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:25,074 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] [2020-10-13 14:22:25,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:22:25,074 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:25,075 INFO L82 PathProgramCache]: Analyzing trace with hash -130949892, now seen corresponding path program 1 times [2020-10-13 14:22:25,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:25,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559267062] [2020-10-13 14:22:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:30,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:30,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:30,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:22:30,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:22:30,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 14:22:30,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:30,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 14:22:30,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:22:30,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:22:30,386 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:30,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:30,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:30,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:30,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:22:30,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:30,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:30,425 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 14:22:30,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559267062] [2020-10-13 14:22:30,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:30,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:30,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003993983] [2020-10-13 14:22:30,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:30,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:30,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:30,431 INFO L87 Difference]: Start difference. First operand 2190 states and 3356 transitions. Second operand 7 states. [2020-10-13 14:22:30,632 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:32,208 INFO L93 Difference]: Finished difference Result 7100 states and 11030 transitions. [2020-10-13 14:22:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:32,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-13 14:22:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:32,240 INFO L225 Difference]: With dead ends: 7100 [2020-10-13 14:22:32,240 INFO L226 Difference]: Without dead ends: 5961 [2020-10-13 14:22:32,245 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 14:22:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2020-10-13 14:22:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 2159. [2020-10-13 14:22:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-10-13 14:22:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3309 transitions. [2020-10-13 14:22:32,446 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3309 transitions. Word has length 97 [2020-10-13 14:22:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:32,447 INFO L479 AbstractCegarLoop]: Abstraction has 2159 states and 3309 transitions. [2020-10-13 14:22:32,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3309 transitions. [2020-10-13 14:22:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:22:32,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:32,450 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] [2020-10-13 14:22:32,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:22:32,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1602276324, now seen corresponding path program 1 times [2020-10-13 14:22:32,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:32,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666921102] [2020-10-13 14:22:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:33,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:33,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:37,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:37,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:22:37,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:37,687 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:37,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:37,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:37,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:37,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:22:37,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:37,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:37,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:37,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:37,725 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 14:22:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666921102] [2020-10-13 14:22:37,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:37,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:37,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518522567] [2020-10-13 14:22:37,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:37,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:37,728 INFO L87 Difference]: Start difference. First operand 2159 states and 3309 transitions. Second operand 7 states. [2020-10-13 14:22:37,910 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:39,252 INFO L93 Difference]: Finished difference Result 7386 states and 11485 transitions. [2020-10-13 14:22:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:39,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-13 14:22:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:39,281 INFO L225 Difference]: With dead ends: 7386 [2020-10-13 14:22:39,281 INFO L226 Difference]: Without dead ends: 5692 [2020-10-13 14:22:39,287 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 14:22:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5692 states. [2020-10-13 14:22:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5692 to 2114. [2020-10-13 14:22:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2020-10-13 14:22:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3242 transitions. [2020-10-13 14:22:39,480 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3242 transitions. Word has length 98 [2020-10-13 14:22:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:39,480 INFO L479 AbstractCegarLoop]: Abstraction has 2114 states and 3242 transitions. [2020-10-13 14:22:39,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3242 transitions. [2020-10-13 14:22:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:22:39,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:39,483 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] [2020-10-13 14:22:39,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:22:39,484 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash -141521877, now seen corresponding path program 1 times [2020-10-13 14:22:39,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:39,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514438937] [2020-10-13 14:22:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:39,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:40,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:41,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:41,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:44,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:44,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:22:44,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:22:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:22:44,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:22:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:22:44,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:44,711 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:44,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:44,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:44,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:44,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:44,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:44,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:22:44,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:44,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:44,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:44,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:44,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:44,749 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 14:22:44,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514438937] [2020-10-13 14:22:44,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:44,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:44,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017905399] [2020-10-13 14:22:44,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:44,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:44,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:44,770 INFO L87 Difference]: Start difference. First operand 2114 states and 3242 transitions. Second operand 7 states. [2020-10-13 14:22:44,962 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:46,540 INFO L93 Difference]: Finished difference Result 12270 states and 19191 transitions. [2020-10-13 14:22:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:46,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-13 14:22:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:46,564 INFO L225 Difference]: With dead ends: 12270 [2020-10-13 14:22:46,564 INFO L226 Difference]: Without dead ends: 10444 [2020-10-13 14:22:46,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:22:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10444 states. [2020-10-13 14:22:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10444 to 3368. [2020-10-13 14:22:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3368 states. [2020-10-13 14:22:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 5207 transitions. [2020-10-13 14:22:46,882 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 5207 transitions. Word has length 98 [2020-10-13 14:22:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:46,883 INFO L479 AbstractCegarLoop]: Abstraction has 3368 states and 5207 transitions. [2020-10-13 14:22:46,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 5207 transitions. [2020-10-13 14:22:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:22:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:46,886 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] [2020-10-13 14:22:46,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:22:46,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 623405579, now seen corresponding path program 1 times [2020-10-13 14:22:46,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:46,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007773988] [2020-10-13 14:22:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:46,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:46,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:47,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:47,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:51,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:22:51,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:22:51,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:22:51,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:51,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:22:51,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:22:51,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:22:51,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:52,122 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:22:52,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:52,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:52,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:52,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:52,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:22:52,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:52,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:52,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:52,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:52,154 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 14:22:52,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007773988] [2020-10-13 14:22:52,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:52,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:22:52,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733881057] [2020-10-13 14:22:52,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:22:52,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:22:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:22:52,156 INFO L87 Difference]: Start difference. First operand 3368 states and 5207 transitions. Second operand 7 states. [2020-10-13 14:22:52,358 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:22:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:54,364 INFO L93 Difference]: Finished difference Result 14804 states and 23033 transitions. [2020-10-13 14:22:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:22:54,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-13 14:22:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:54,391 INFO L225 Difference]: With dead ends: 14804 [2020-10-13 14:22:54,392 INFO L226 Difference]: Without dead ends: 12890 [2020-10-13 14:22:54,400 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 14:22:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2020-10-13 14:22:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 5406. [2020-10-13 14:22:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5406 states. [2020-10-13 14:22:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 8329 transitions. [2020-10-13 14:22:54,907 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 8329 transitions. Word has length 98 [2020-10-13 14:22:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:54,907 INFO L479 AbstractCegarLoop]: Abstraction has 5406 states and 8329 transitions. [2020-10-13 14:22:54,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:22:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 8329 transitions. [2020-10-13 14:22:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:22:54,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:54,912 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] [2020-10-13 14:22:54,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:22:54,912 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1370654517, now seen corresponding path program 1 times [2020-10-13 14:22:54,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:54,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758218960] [2020-10-13 14:22:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:54,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:54,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:54,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:56,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:56,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:56,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:58,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:59,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:22:59,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:22:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:00,169 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:00,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:00,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:00,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 14:23:00,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:23:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:23:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:00,233 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 14:23:00,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758218960] [2020-10-13 14:23:00,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:00,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:23:00,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526603940] [2020-10-13 14:23:00,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:23:00,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:23:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:23:00,236 INFO L87 Difference]: Start difference. First operand 5406 states and 8329 transitions. Second operand 6 states. [2020-10-13 14:23:00,428 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:23:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:01,814 INFO L93 Difference]: Finished difference Result 10607 states and 16383 transitions. [2020-10-13 14:23:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:23:01,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-13 14:23:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:01,829 INFO L225 Difference]: With dead ends: 10607 [2020-10-13 14:23:01,830 INFO L226 Difference]: Without dead ends: 7949 [2020-10-13 14:23:01,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:23:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2020-10-13 14:23:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 5463. [2020-10-13 14:23:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5463 states. [2020-10-13 14:23:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 8369 transitions. [2020-10-13 14:23:02,473 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 8369 transitions. Word has length 99 [2020-10-13 14:23:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:02,474 INFO L479 AbstractCegarLoop]: Abstraction has 5463 states and 8369 transitions. [2020-10-13 14:23:02,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:23:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 8369 transitions. [2020-10-13 14:23:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:23:02,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:02,478 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] [2020-10-13 14:23:02,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:23:02,479 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash 899122428, now seen corresponding path program 1 times [2020-10-13 14:23:02,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:02,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330433987] [2020-10-13 14:23:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:02,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:02,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:02,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:02,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:03,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:03,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:03,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:03,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:04,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:05,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:07,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:07,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:23:07,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:07,698 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:07,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:07,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:07,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:07,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:07,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:23:07,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:23:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:23:07,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:07,727 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 14:23:07,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330433987] [2020-10-13 14:23:07,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:07,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:23:07,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754091900] [2020-10-13 14:23:07,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:23:07,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:23:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:23:07,729 INFO L87 Difference]: Start difference. First operand 5463 states and 8369 transitions. Second operand 7 states. [2020-10-13 14:23:07,933 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:23:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:10,636 INFO L93 Difference]: Finished difference Result 21647 states and 33353 transitions. [2020-10-13 14:23:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:23:10,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-13 14:23:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:10,662 INFO L225 Difference]: With dead ends: 21647 [2020-10-13 14:23:10,662 INFO L226 Difference]: Without dead ends: 17224 [2020-10-13 14:23:10,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:23:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2020-10-13 14:23:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 5422. [2020-10-13 14:23:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5422 states. [2020-10-13 14:23:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5422 states to 5422 states and 8306 transitions. [2020-10-13 14:23:11,261 INFO L78 Accepts]: Start accepts. Automaton has 5422 states and 8306 transitions. Word has length 99 [2020-10-13 14:23:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:11,262 INFO L479 AbstractCegarLoop]: Abstraction has 5422 states and 8306 transitions. [2020-10-13 14:23:11,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:23:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5422 states and 8306 transitions. [2020-10-13 14:23:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:23:11,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:11,266 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] [2020-10-13 14:23:11,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:23:11,266 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1664049884, now seen corresponding path program 1 times [2020-10-13 14:23:11,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:11,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874800181] [2020-10-13 14:23:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:11,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:11,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:12,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:12,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:13,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:13,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:13,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:13,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:13,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:14,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:23:16,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:23:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:23:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:16,500 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:16,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:16,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:16,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:16,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:16,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:23:16,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:16,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:23:16,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:16,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:23:16,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:16,527 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 14:23:16,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874800181] [2020-10-13 14:23:16,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:16,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:23:16,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607913657] [2020-10-13 14:23:16,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:23:16,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:23:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:23:16,529 INFO L87 Difference]: Start difference. First operand 5422 states and 8306 transitions. Second operand 7 states. [2020-10-13 14:23:16,727 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 14:23:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:19,465 INFO L93 Difference]: Finished difference Result 21806 states and 33610 transitions. [2020-10-13 14:23:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:23:19,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-13 14:23:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:19,485 INFO L225 Difference]: With dead ends: 21806 [2020-10-13 14:23:19,485 INFO L226 Difference]: Without dead ends: 17429 [2020-10-13 14:23:19,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:23:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2020-10-13 14:23:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 5397. [2020-10-13 14:23:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5397 states. [2020-10-13 14:23:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 8271 transitions. [2020-10-13 14:23:20,239 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 8271 transitions. Word has length 99 [2020-10-13 14:23:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:20,239 INFO L479 AbstractCegarLoop]: Abstraction has 5397 states and 8271 transitions. [2020-10-13 14:23:20,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:23:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 8271 transitions. [2020-10-13 14:23:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:23:20,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:20,243 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] [2020-10-13 14:23:20,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:23:20,244 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1170162965, now seen corresponding path program 1 times [2020-10-13 14:23:20,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:20,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544741713] [2020-10-13 14:23:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:20,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:20,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:20,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:20,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:21,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:23,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:24,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:25,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:25,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:23:25,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:23:25,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:23:25,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:23:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:23:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:23:25,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:25,496 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:25,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:25,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:25,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:25,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:25,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:23:25,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:25,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:23:25,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:25,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:23:25,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:25,532 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 14:23:25,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544741713] [2020-10-13 14:23:25,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:25,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:23:25,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072017547] [2020-10-13 14:23:25,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:23:25,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:23:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:23:25,535 INFO L87 Difference]: Start difference. First operand 5397 states and 8271 transitions. Second operand 6 states. [2020-10-13 14:23:25,739 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:23:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:26,982 INFO L93 Difference]: Finished difference Result 9987 states and 15361 transitions. [2020-10-13 14:23:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:23:26,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-13 14:23:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:26,993 INFO L225 Difference]: With dead ends: 9987 [2020-10-13 14:23:26,993 INFO L226 Difference]: Without dead ends: 5312 [2020-10-13 14:23:27,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:23:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2020-10-13 14:23:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 5310. [2020-10-13 14:23:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5310 states. [2020-10-13 14:23:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 8154 transitions. [2020-10-13 14:23:27,484 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 8154 transitions. Word has length 99 [2020-10-13 14:23:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:27,485 INFO L479 AbstractCegarLoop]: Abstraction has 5310 states and 8154 transitions. [2020-10-13 14:23:27,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:23:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 8154 transitions. [2020-10-13 14:23:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 14:23:27,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:27,487 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] [2020-10-13 14:23:27,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:23:27,488 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash 824547866, now seen corresponding path program 1 times [2020-10-13 14:23:27,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:27,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114475144] [2020-10-13 14:23:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:27,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:27,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:27,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:28,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:29,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:29,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:29,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:31,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:31,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:32,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:32,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:32,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 14:23:32,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:23:32,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:23:32,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:32,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:23:32,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 14:23:32,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:23:32,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:32,698 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:32,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:32,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:32,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:32,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:23:32,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:32,725 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 14:23:32,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114475144] [2020-10-13 14:23:32,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:32,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:23:32,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513995287] [2020-10-13 14:23:32,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:23:32,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:23:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:23:32,726 INFO L87 Difference]: Start difference. First operand 5310 states and 8154 transitions. Second operand 4 states. [2020-10-13 14:23:32,905 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 14:23:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:34,683 INFO L93 Difference]: Finished difference Result 14616 states and 22540 transitions. [2020-10-13 14:23:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:23:34,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-13 14:23:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:34,696 INFO L225 Difference]: With dead ends: 14616 [2020-10-13 14:23:34,696 INFO L226 Difference]: Without dead ends: 10390 [2020-10-13 14:23:34,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:23:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10390 states. [2020-10-13 14:23:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10390 to 10388. [2020-10-13 14:23:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10388 states. [2020-10-13 14:23:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10388 states to 10388 states and 15882 transitions. [2020-10-13 14:23:35,636 INFO L78 Accepts]: Start accepts. Automaton has 10388 states and 15882 transitions. Word has length 100 [2020-10-13 14:23:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:35,636 INFO L479 AbstractCegarLoop]: Abstraction has 10388 states and 15882 transitions. [2020-10-13 14:23:35,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:23:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10388 states and 15882 transitions. [2020-10-13 14:23:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:23:35,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:35,645 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] [2020-10-13 14:23:35,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:23:35,645 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1354912666, now seen corresponding path program 1 times [2020-10-13 14:23:35,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:35,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877796883] [2020-10-13 14:23:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:35,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:35,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:36,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:36,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:36,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:37,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:38,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:39,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:39,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:40,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:40,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:23:40,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:40,879 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:40,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:40,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:40,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:40,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:23:40,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:23:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:23:40,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:40,913 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 14:23:40,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877796883] [2020-10-13 14:23:40,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:40,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:23:40,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34512194] [2020-10-13 14:23:40,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:23:40,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:23:40,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:23:40,915 INFO L87 Difference]: Start difference. First operand 10388 states and 15882 transitions. Second operand 6 states. [2020-10-13 14:23:41,122 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:23:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:42,808 INFO L93 Difference]: Finished difference Result 19064 states and 29132 transitions. [2020-10-13 14:23:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:23:42,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-13 14:23:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:42,821 INFO L225 Difference]: With dead ends: 19064 [2020-10-13 14:23:42,821 INFO L226 Difference]: Without dead ends: 10095 [2020-10-13 14:23:42,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:23:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10095 states. [2020-10-13 14:23:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10095 to 10093. [2020-10-13 14:23:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10093 states. [2020-10-13 14:23:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10093 states to 10093 states and 15415 transitions. [2020-10-13 14:23:43,988 INFO L78 Accepts]: Start accepts. Automaton has 10093 states and 15415 transitions. Word has length 102 [2020-10-13 14:23:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:43,989 INFO L479 AbstractCegarLoop]: Abstraction has 10093 states and 15415 transitions. [2020-10-13 14:23:43,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:23:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 10093 states and 15415 transitions. [2020-10-13 14:23:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:23:43,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:43,992 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] [2020-10-13 14:23:43,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:23:43,993 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash 685630441, now seen corresponding path program 1 times [2020-10-13 14:23:43,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:43,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819482964] [2020-10-13 14:23:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:44,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:45,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:46,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:46,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:46,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:46,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:48,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:48,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:48,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:48,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:49,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 14:23:49,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:49,239 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:49,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:49,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:49,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:49,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:49,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:23:49,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:23:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:23:49,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:49,279 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 14:23:49,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819482964] [2020-10-13 14:23:49,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:49,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:23:49,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581235020] [2020-10-13 14:23:49,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:23:49,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:49,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:23:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:23:49,281 INFO L87 Difference]: Start difference. First operand 10093 states and 15415 transitions. Second operand 6 states. [2020-10-13 14:23:49,483 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:23:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:51,664 INFO L93 Difference]: Finished difference Result 18609 states and 28409 transitions. [2020-10-13 14:23:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:23:51,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-13 14:23:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:51,674 INFO L225 Difference]: With dead ends: 18609 [2020-10-13 14:23:51,674 INFO L226 Difference]: Without dead ends: 9489 [2020-10-13 14:23:51,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:23:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2020-10-13 14:23:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 9487. [2020-10-13 14:23:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9487 states. [2020-10-13 14:23:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9487 states to 9487 states and 14448 transitions. [2020-10-13 14:23:52,625 INFO L78 Accepts]: Start accepts. Automaton has 9487 states and 14448 transitions. Word has length 102 [2020-10-13 14:23:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:52,625 INFO L479 AbstractCegarLoop]: Abstraction has 9487 states and 14448 transitions. [2020-10-13 14:23:52,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:23:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 9487 states and 14448 transitions. [2020-10-13 14:23:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:23:52,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:52,629 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] [2020-10-13 14:23:52,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:23:52,629 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash 589472587, now seen corresponding path program 1 times [2020-10-13 14:23:52,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:52,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844319008] [2020-10-13 14:23:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:52,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:52,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:53,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:53,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:53,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:53,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:53,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:54,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:54,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:54,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:56,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:57,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:57,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:57,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:23:57,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:23:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 14:23:57,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:23:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:23:57,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:23:57,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:23:57,952 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:23:57,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:57,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:57,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:57,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:57,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:57,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:23:57,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:23:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:23:57,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:58,004 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 14:23:58,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844319008] [2020-10-13 14:23:58,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:58,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:23:58,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102926668] [2020-10-13 14:23:58,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:23:58,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:58,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:23:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:23:58,013 INFO L87 Difference]: Start difference. First operand 9487 states and 14448 transitions. Second operand 6 states. [2020-10-13 14:23:58,204 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:23:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:59,817 INFO L93 Difference]: Finished difference Result 18243 states and 27826 transitions. [2020-10-13 14:23:59,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:23:59,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-13 14:23:59,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:59,828 INFO L225 Difference]: With dead ends: 18243 [2020-10-13 14:23:59,828 INFO L226 Difference]: Without dead ends: 9345 [2020-10-13 14:23:59,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:23:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2020-10-13 14:24:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 9343. [2020-10-13 14:24:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9343 states. [2020-10-13 14:24:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9343 states to 9343 states and 14225 transitions. [2020-10-13 14:24:00,855 INFO L78 Accepts]: Start accepts. Automaton has 9343 states and 14225 transitions. Word has length 102 [2020-10-13 14:24:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:24:00,855 INFO L479 AbstractCegarLoop]: Abstraction has 9343 states and 14225 transitions. [2020-10-13 14:24:00,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:24:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9343 states and 14225 transitions. [2020-10-13 14:24:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:24:00,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:24:00,858 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] [2020-10-13 14:24:00,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:24:00,858 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:24:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:24:00,858 INFO L82 PathProgramCache]: Analyzing trace with hash -91581700, now seen corresponding path program 1 times [2020-10-13 14:24:00,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:24:00,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189601268] [2020-10-13 14:24:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:24:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:00,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:00,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:00,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:01,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:01,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:01,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:03,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:03,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:04,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:04,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:05,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:05,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:24:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:24:05,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:24:05,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:06,084 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:24:06,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:24:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:06,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:06,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:24:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:06,119 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 14:24:06,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189601268] [2020-10-13 14:24:06,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:24:06,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:24:06,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965477701] [2020-10-13 14:24:06,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:24:06,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:24:06,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:24:06,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:24:06,122 INFO L87 Difference]: Start difference. First operand 9343 states and 14225 transitions. Second operand 6 states. [2020-10-13 14:24:06,333 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:24:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:24:08,044 INFO L93 Difference]: Finished difference Result 18123 states and 27642 transitions. [2020-10-13 14:24:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:24:08,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-13 14:24:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:24:08,054 INFO L225 Difference]: With dead ends: 18123 [2020-10-13 14:24:08,054 INFO L226 Difference]: Without dead ends: 9256 [2020-10-13 14:24:08,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:24:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9256 states. [2020-10-13 14:24:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9256 to 9254. [2020-10-13 14:24:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9254 states. [2020-10-13 14:24:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9254 states to 9254 states and 14093 transitions. [2020-10-13 14:24:09,092 INFO L78 Accepts]: Start accepts. Automaton has 9254 states and 14093 transitions. Word has length 102 [2020-10-13 14:24:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:24:09,092 INFO L479 AbstractCegarLoop]: Abstraction has 9254 states and 14093 transitions. [2020-10-13 14:24:09,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:24:09,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9254 states and 14093 transitions. [2020-10-13 14:24:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:24:09,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:24:09,094 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] [2020-10-13 14:24:09,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:24:09,094 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:24:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:24:09,095 INFO L82 PathProgramCache]: Analyzing trace with hash -517178705, now seen corresponding path program 1 times [2020-10-13 14:24:09,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:24:09,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757630584] [2020-10-13 14:24:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:24:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:09,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:09,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:09,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:09,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:10,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:10,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:10,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:11,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:13,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:13,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:14,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:14,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:24:14,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:24:14,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:24:14,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:14,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:24:14,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:24:14,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 14:24:14,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:14,492 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:24:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:24:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:14,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:14,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:14,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:24:14,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:24:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:24:14,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:24:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:24:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:24:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:14,535 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 14:24:14,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757630584] [2020-10-13 14:24:14,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:24:14,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:24:14,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888011504] [2020-10-13 14:24:14,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:24:14,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:24:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:24:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:24:14,537 INFO L87 Difference]: Start difference. First operand 9254 states and 14093 transitions. Second operand 11 states. [2020-10-13 14:24:14,833 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:24:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:24:19,722 INFO L93 Difference]: Finished difference Result 35083 states and 53559 transitions. [2020-10-13 14:24:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 14:24:19,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-13 14:24:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:24:19,755 INFO L225 Difference]: With dead ends: 35083 [2020-10-13 14:24:19,755 INFO L226 Difference]: Without dead ends: 26542 [2020-10-13 14:24:19,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:24:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2020-10-13 14:24:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 9254. [2020-10-13 14:24:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9254 states. [2020-10-13 14:24:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9254 states to 9254 states and 14092 transitions. [2020-10-13 14:24:20,942 INFO L78 Accepts]: Start accepts. Automaton has 9254 states and 14092 transitions. Word has length 103 [2020-10-13 14:24:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:24:20,943 INFO L479 AbstractCegarLoop]: Abstraction has 9254 states and 14092 transitions. [2020-10-13 14:24:20,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:24:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 9254 states and 14092 transitions. [2020-10-13 14:24:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:24:20,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:24:20,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:20,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:24:20,946 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:24:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:24:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash -659708050, now seen corresponding path program 1 times [2020-10-13 14:24:20,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:24:20,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452639756] [2020-10-13 14:24:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:24:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:21,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:21,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:21,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:21,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:23,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:23,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:24,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:26,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:26,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:24:26,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:24:26,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:24:26,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:24:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:24:26,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 14:24:26,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:26,409 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:24:26,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:24:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:26,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:24:26,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:26,440 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 14:24:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452639756] [2020-10-13 14:24:26,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:24:26,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:24:26,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194645851] [2020-10-13 14:24:26,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:24:26,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:24:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:24:26,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:24:26,442 INFO L87 Difference]: Start difference. First operand 9254 states and 14092 transitions. Second operand 8 states. [2020-10-13 14:24:26,668 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:24:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:24:29,807 INFO L93 Difference]: Finished difference Result 22123 states and 33757 transitions. [2020-10-13 14:24:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:24:29,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-13 14:24:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:24:29,823 INFO L225 Difference]: With dead ends: 22123 [2020-10-13 14:24:29,823 INFO L226 Difference]: Without dead ends: 13325 [2020-10-13 14:24:29,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:24:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13325 states. [2020-10-13 14:24:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13325 to 9067. [2020-10-13 14:24:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9067 states. [2020-10-13 14:24:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9067 states to 9067 states and 13811 transitions. [2020-10-13 14:24:31,176 INFO L78 Accepts]: Start accepts. Automaton has 9067 states and 13811 transitions. Word has length 103 [2020-10-13 14:24:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:24:31,176 INFO L479 AbstractCegarLoop]: Abstraction has 9067 states and 13811 transitions. [2020-10-13 14:24:31,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:24:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9067 states and 13811 transitions. [2020-10-13 14:24:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:24:31,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:24:31,178 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] [2020-10-13 14:24:31,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:24:31,178 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:24:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:24:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -599693225, now seen corresponding path program 1 times [2020-10-13 14:24:31,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:24:31,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254076698] [2020-10-13 14:24:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:24:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:31,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:31,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:31,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:31,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:32,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:36,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:36,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:24:36,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:24:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:24:36,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:24:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:24:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:24:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:36,542 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:24:36,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:24:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:36,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:36,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:36,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:24:36,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:24:36,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:24:36,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:24:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:24:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:24:36,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:36,576 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 14:24:36,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254076698] [2020-10-13 14:24:36,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:24:36,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:24:36,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771530062] [2020-10-13 14:24:36,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:24:36,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:24:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:24:36,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:24:36,578 INFO L87 Difference]: Start difference. First operand 9067 states and 13811 transitions. Second operand 9 states. [2020-10-13 14:24:36,786 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 14:24:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:24:39,860 INFO L93 Difference]: Finished difference Result 21775 states and 33237 transitions. [2020-10-13 14:24:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:24:39,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 104 [2020-10-13 14:24:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:24:39,876 INFO L225 Difference]: With dead ends: 21775 [2020-10-13 14:24:39,877 INFO L226 Difference]: Without dead ends: 13138 [2020-10-13 14:24:39,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:24:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2020-10-13 14:24:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 8880. [2020-10-13 14:24:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8880 states. [2020-10-13 14:24:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 13531 transitions. [2020-10-13 14:24:41,247 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 13531 transitions. Word has length 104 [2020-10-13 14:24:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:24:41,247 INFO L479 AbstractCegarLoop]: Abstraction has 8880 states and 13531 transitions. [2020-10-13 14:24:41,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:24:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 13531 transitions. [2020-10-13 14:24:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:24:41,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:24:41,249 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] [2020-10-13 14:24:41,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:24:41,249 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:24:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:24:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1172647840, now seen corresponding path program 1 times [2020-10-13 14:24:41,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:24:41,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718569788] [2020-10-13 14:24:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:24:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:41,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:42,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:43,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:46,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:24:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:24:46,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:46,655 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:24:46,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:24:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:46,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:46,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:24:46,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:24:46,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:24:46,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:46,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:24:46,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:24:46,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:24:46,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:46,699 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 14:24:46,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718569788] [2020-10-13 14:24:46,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:24:46,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:24:46,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853610314] [2020-10-13 14:24:46,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:24:46,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:24:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:24:46,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:24:46,701 INFO L87 Difference]: Start difference. First operand 8880 states and 13531 transitions. Second operand 12 states. [2020-10-13 14:24:46,947 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:24:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:24:51,610 INFO L93 Difference]: Finished difference Result 26233 states and 39999 transitions. [2020-10-13 14:24:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:24:51,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-10-13 14:24:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:24:51,631 INFO L225 Difference]: With dead ends: 26233 [2020-10-13 14:24:51,632 INFO L226 Difference]: Without dead ends: 17622 [2020-10-13 14:24:51,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:24:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17622 states. [2020-10-13 14:24:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17622 to 8883. [2020-10-13 14:24:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-10-13 14:24:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13534 transitions. [2020-10-13 14:24:53,236 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13534 transitions. Word has length 104 [2020-10-13 14:24:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:24:53,236 INFO L479 AbstractCegarLoop]: Abstraction has 8883 states and 13534 transitions. [2020-10-13 14:24:53,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:24:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13534 transitions. [2020-10-13 14:24:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:24:53,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:24:53,238 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] [2020-10-13 14:24:53,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:24:53,238 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:24:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:24:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash 670596406, now seen corresponding path program 1 times [2020-10-13 14:24:53,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:24:53,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122000810] [2020-10-13 14:24:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:24:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:53,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:53,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:53,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:54,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:55,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:56,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:56,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:56,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:58,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 14:24:58,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:58,530 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 27 [2020-10-13 14:24:58,780 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:24:58,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:24:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:24:58,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:24:58,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:24:58,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:24:58,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:24:58,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:24:58,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:24:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:24:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:24:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:24:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:24:58,809 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 14:24:58,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122000810] [2020-10-13 14:24:58,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:24:58,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:24:58,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544373077] [2020-10-13 14:24:58,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:24:58,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:24:58,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:24:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:24:58,812 INFO L87 Difference]: Start difference. First operand 8883 states and 13534 transitions. Second operand 12 states. [2020-10-13 14:24:59,155 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:25:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:25:18,607 INFO L93 Difference]: Finished difference Result 87804 states and 132214 transitions. [2020-10-13 14:25:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 14:25:18,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-10-13 14:25:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:25:18,697 INFO L225 Difference]: With dead ends: 87804 [2020-10-13 14:25:18,697 INFO L226 Difference]: Without dead ends: 79311 [2020-10-13 14:25:18,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 14:25:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79311 states. [2020-10-13 14:25:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79311 to 8883. [2020-10-13 14:25:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-10-13 14:25:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13533 transitions. [2020-10-13 14:25:21,016 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13533 transitions. Word has length 104 [2020-10-13 14:25:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:25:21,016 INFO L479 AbstractCegarLoop]: Abstraction has 8883 states and 13533 transitions. [2020-10-13 14:25:21,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:25:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13533 transitions. [2020-10-13 14:25:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 14:25:21,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:25:21,018 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 14:25:21,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:25:21,018 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:25:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:25:21,018 INFO L82 PathProgramCache]: Analyzing trace with hash 169323884, now seen corresponding path program 1 times [2020-10-13 14:25:21,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:25:21,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607687634] [2020-10-13 14:25:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:25:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:25:21,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:21,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:21,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:22,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:26,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:25:26,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 14:25:26,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:25:26,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:25:26,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:25:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:25:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:25:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 14:25:26,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:25:26,408 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:25:26,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:25:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:25:26,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:26,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:25:26,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:25:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:25:26,437 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 14:25:26,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607687634] [2020-10-13 14:25:26,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:25:26,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:25:26,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609366240] [2020-10-13 14:25:26,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:25:26,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:25:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:25:26,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:25:26,439 INFO L87 Difference]: Start difference. First operand 8883 states and 13533 transitions. Second operand 9 states. [2020-10-13 14:25:26,666 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:25:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:25:29,963 INFO L93 Difference]: Finished difference Result 17558 states and 26765 transitions. [2020-10-13 14:25:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 14:25:29,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 105 [2020-10-13 14:25:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:25:29,972 INFO L225 Difference]: With dead ends: 17558 [2020-10-13 14:25:29,972 INFO L226 Difference]: Without dead ends: 8947 [2020-10-13 14:25:29,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-13 14:25:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8947 states. [2020-10-13 14:25:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8947 to 8880. [2020-10-13 14:25:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8880 states. [2020-10-13 14:25:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 13529 transitions. [2020-10-13 14:25:31,826 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 13529 transitions. Word has length 105 [2020-10-13 14:25:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:25:31,826 INFO L479 AbstractCegarLoop]: Abstraction has 8880 states and 13529 transitions. [2020-10-13 14:25:31,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:25:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 13529 transitions. [2020-10-13 14:25:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 14:25:31,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:25:31,828 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 14:25:31,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:25:31,828 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:25:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:25:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash -504884828, now seen corresponding path program 1 times [2020-10-13 14:25:31,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:25:31,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182887593] [2020-10-13 14:25:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:25:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:25:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:32,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:32,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:33,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:33,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:36,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:25:36,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:25:37,267 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:25:37,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:25:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:25:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:25:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:25:37,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:25:37,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:25:37,300 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 14:25:37,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182887593] [2020-10-13 14:25:37,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:25:37,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 14:25:37,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761140529] [2020-10-13 14:25:37,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:25:37,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:25:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:25:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:25:37,302 INFO L87 Difference]: Start difference. First operand 8880 states and 13529 transitions. Second operand 13 states. [2020-10-13 14:25:37,569 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 174