/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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:56:02,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:56:02,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:56:02,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:56:02,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:56:02,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:56:02,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:56:02,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:56:02,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:56:02,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:56:02,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:56:02,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:56:02,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:56:02,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:56:02,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:56:02,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:56:02,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:56:02,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:56:02,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:56:02,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:56:02,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:56:02,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:56:02,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:56:02,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:56:02,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:56:02,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:56:02,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:56:02,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:56:02,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:56:02,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:56:02,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:56:02,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:56:02,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:56:02,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:56:02,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:56:02,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:56:02,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:56:02,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:56:02,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:56:02,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:56:02,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:56:02,646 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 14:56:02,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:56:02,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:56:02,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:56:02,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:56:02,688 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:56:02,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:56:02,689 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:56:02,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:56:02,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:56:02,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:56:02,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:56:02,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:56:02,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:56:02,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:56:02,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:56:02,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:56:02,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:56:02,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:56:02,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:56:02,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:56:02,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:56:02,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:56:02,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:56:02,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:56:02,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:56:02,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:56:02,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:56:02,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:56:02,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:56:02,693 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 14:56:02,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:56:02,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:56:02,998 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:56:03,000 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:56:03,001 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:56:03,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-13 14:56:03,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f1d3d43f/8e00f03bd2fe4e20b3115830a087836e/FLAGa221ba171 [2020-10-13 14:56:03,542 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:56:03,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-13 14:56:03,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f1d3d43f/8e00f03bd2fe4e20b3115830a087836e/FLAGa221ba171 [2020-10-13 14:56:03,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f1d3d43f/8e00f03bd2fe4e20b3115830a087836e [2020-10-13 14:56:03,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:56:03,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:56:03,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:03,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:56:03,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:56:03,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:03" (1/1) ... [2020-10-13 14:56:03,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799d28d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:03, skipping insertion in model container [2020-10-13 14:56:03,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:03" (1/1) ... [2020-10-13 14:56:03,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:56:03,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:56:04,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:04,462 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:56:04,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:04,612 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:56:04,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04 WrapperNode [2020-10-13 14:56:04,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:04,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:56:04,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:56:04,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:56:04,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (1/1) ... [2020-10-13 14:56:04,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:56:04,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:56:04,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:56:04,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:56:04,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (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 14:56:04,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:56:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:56:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:56:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:56:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:56:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:56:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:56:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:56:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:56:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:56:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:56:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:56:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:56:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:56:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:56:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:56:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:56:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:56:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:56:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:56:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:56:06,099 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:56:06,100 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:56:06,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:06 BoogieIcfgContainer [2020-10-13 14:56:06,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:56:06,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:56:06,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:56:06,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:56:06,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:56:03" (1/3) ... [2020-10-13 14:56:06,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f1c38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:06, skipping insertion in model container [2020-10-13 14:56:06,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:04" (2/3) ... [2020-10-13 14:56:06,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f1c38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:06, skipping insertion in model container [2020-10-13 14:56:06,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:06" (3/3) ... [2020-10-13 14:56:06,116 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-13 14:56:06,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:56:06,137 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-13 14:56:06,153 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-13 14:56:06,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:56:06,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:56:06,183 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:56:06,183 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:56:06,183 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:56:06,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:56:06,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:56:06,184 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:56:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2020-10-13 14:56:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:56:06,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:06,224 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 14:56:06,224 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash 538953665, now seen corresponding path program 1 times [2020-10-13 14:56:06,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:06,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599419292] [2020-10-13 14:56:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:06,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:11,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:56:11,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:56:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 14:56:11,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:11,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:11,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:11,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:56:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:56:12,259 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:12,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:12,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:12,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:12,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:12,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:56:12,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:12,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:12,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:12,346 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 14:56:12,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599419292] [2020-10-13 14:56:12,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:12,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:12,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102133669] [2020-10-13 14:56:12,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:12,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:12,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:12,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:12,378 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 5 states. [2020-10-13 14:56:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:14,795 INFO L93 Difference]: Finished difference Result 773 states and 1357 transitions. [2020-10-13 14:56:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:14,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-13 14:56:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:14,834 INFO L225 Difference]: With dead ends: 773 [2020-10-13 14:56:14,834 INFO L226 Difference]: Without dead ends: 519 [2020-10-13 14:56:14,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-13 14:56:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 496. [2020-10-13 14:56:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-10-13 14:56:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 723 transitions. [2020-10-13 14:56:14,964 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 723 transitions. Word has length 102 [2020-10-13 14:56:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 723 transitions. [2020-10-13 14:56:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 723 transitions. [2020-10-13 14:56:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:56:14,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:14,970 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 14:56:14,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:56:14,971 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1298378481, now seen corresponding path program 1 times [2020-10-13 14:56:14,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:14,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544899283] [2020-10-13 14:56:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:15,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:19,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:20,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:20,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:56:20,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:56:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:56:20,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:56:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:56:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:20,300 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:20,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:20,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:20,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:20,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:20,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:56:20,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:20,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:20,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:20,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:20,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:20,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544899283] [2020-10-13 14:56:20,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:20,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:20,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504333312] [2020-10-13 14:56:20,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:20,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:20,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:20,365 INFO L87 Difference]: Start difference. First operand 496 states and 723 transitions. Second operand 4 states. [2020-10-13 14:56:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:22,518 INFO L93 Difference]: Finished difference Result 1442 states and 2097 transitions. [2020-10-13 14:56:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:22,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 14:56:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:22,525 INFO L225 Difference]: With dead ends: 1442 [2020-10-13 14:56:22,526 INFO L226 Difference]: Without dead ends: 978 [2020-10-13 14:56:22,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-10-13 14:56:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 498. [2020-10-13 14:56:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-13 14:56:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 725 transitions. [2020-10-13 14:56:22,575 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 725 transitions. Word has length 103 [2020-10-13 14:56:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:22,575 INFO L479 AbstractCegarLoop]: Abstraction has 498 states and 725 transitions. [2020-10-13 14:56:22,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 725 transitions. [2020-10-13 14:56:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:56:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:22,579 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 14:56:22,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:56:22,580 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash 391789368, now seen corresponding path program 1 times [2020-10-13 14:56:22,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:22,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604308773] [2020-10-13 14:56:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:24,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:27,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:27,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:56:27,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:56:27,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 14:56:27,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 14:56:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 14:56:27,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:27,890 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:27,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:27,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:27,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:27,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:27,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:56:27,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:27,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:27,935 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 14:56:27,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604308773] [2020-10-13 14:56:27,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:27,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:27,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083704872] [2020-10-13 14:56:27,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:27,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:27,939 INFO L87 Difference]: Start difference. First operand 498 states and 725 transitions. Second operand 4 states. [2020-10-13 14:56:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:29,417 INFO L93 Difference]: Finished difference Result 1029 states and 1555 transitions. [2020-10-13 14:56:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:29,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-10-13 14:56:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:29,423 INFO L225 Difference]: With dead ends: 1029 [2020-10-13 14:56:29,423 INFO L226 Difference]: Without dead ends: 662 [2020-10-13 14:56:29,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-10-13 14:56:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 646. [2020-10-13 14:56:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-10-13 14:56:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 969 transitions. [2020-10-13 14:56:29,473 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 969 transitions. Word has length 104 [2020-10-13 14:56:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:29,473 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 969 transitions. [2020-10-13 14:56:29,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 969 transitions. [2020-10-13 14:56:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:56:29,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:29,476 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 14:56:29,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:56:29,477 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash 757611906, now seen corresponding path program 1 times [2020-10-13 14:56:29,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:29,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992442053] [2020-10-13 14:56:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:31,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:34,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:34,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:56:34,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:56:34,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:56:34,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:56:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:56:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:34,865 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:34,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:34,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:34,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:34,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:34,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:34,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:56:34,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:34,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:34,907 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 14:56:34,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992442053] [2020-10-13 14:56:34,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:34,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:34,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830322877] [2020-10-13 14:56:34,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:34,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:34,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:34,910 INFO L87 Difference]: Start difference. First operand 646 states and 969 transitions. Second operand 5 states. [2020-10-13 14:56:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:36,093 INFO L93 Difference]: Finished difference Result 1274 states and 1912 transitions. [2020-10-13 14:56:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:36,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-13 14:56:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:36,099 INFO L225 Difference]: With dead ends: 1274 [2020-10-13 14:56:36,099 INFO L226 Difference]: Without dead ends: 646 [2020-10-13 14:56:36,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-13 14:56:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 645. [2020-10-13 14:56:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-13 14:56:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 965 transitions. [2020-10-13 14:56:36,149 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 965 transitions. Word has length 104 [2020-10-13 14:56:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:36,150 INFO L479 AbstractCegarLoop]: Abstraction has 645 states and 965 transitions. [2020-10-13 14:56:36,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 965 transitions. [2020-10-13 14:56:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:56:36,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:36,152 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 14:56:36,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:56:36,152 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:36,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1069242898, now seen corresponding path program 1 times [2020-10-13 14:56:36,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:36,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296795500] [2020-10-13 14:56:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:39,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:41,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:41,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:56:41,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:41,520 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:41,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:41,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:56:41,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:41,581 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 14:56:41,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296795500] [2020-10-13 14:56:41,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:41,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:41,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944050744] [2020-10-13 14:56:41,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:41,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:41,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:41,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:41,585 INFO L87 Difference]: Start difference. First operand 645 states and 965 transitions. Second operand 5 states. [2020-10-13 14:56:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:43,932 INFO L93 Difference]: Finished difference Result 1577 states and 2351 transitions. [2020-10-13 14:56:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:43,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-13 14:56:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:43,939 INFO L225 Difference]: With dead ends: 1577 [2020-10-13 14:56:43,939 INFO L226 Difference]: Without dead ends: 965 [2020-10-13 14:56:43,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2020-10-13 14:56:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 950. [2020-10-13 14:56:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2020-10-13 14:56:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1406 transitions. [2020-10-13 14:56:44,006 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1406 transitions. Word has length 104 [2020-10-13 14:56:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:44,007 INFO L479 AbstractCegarLoop]: Abstraction has 950 states and 1406 transitions. [2020-10-13 14:56:44,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1406 transitions. [2020-10-13 14:56:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:56:44,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:44,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:44,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:56:44,011 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1524552344, now seen corresponding path program 1 times [2020-10-13 14:56:44,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:44,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785374725] [2020-10-13 14:56:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:44,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:44,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:44,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:49,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:49,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:56:49,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:56:49,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:56:49,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:49,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:49,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:56:49,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:56:49,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:49,289 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:49,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:49,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:49,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:49,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:49,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:56:49,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:49,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:49,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:49,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:49,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:49,333 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 14:56:49,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785374725] [2020-10-13 14:56:49,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:49,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:49,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934487259] [2020-10-13 14:56:49,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:49,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:49,337 INFO L87 Difference]: Start difference. First operand 950 states and 1406 transitions. Second operand 4 states. [2020-10-13 14:56:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:51,340 INFO L93 Difference]: Finished difference Result 2132 states and 3209 transitions. [2020-10-13 14:56:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:51,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-13 14:56:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:51,353 INFO L225 Difference]: With dead ends: 2132 [2020-10-13 14:56:51,353 INFO L226 Difference]: Without dead ends: 1474 [2020-10-13 14:56:51,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2020-10-13 14:56:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1461. [2020-10-13 14:56:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-10-13 14:56:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2157 transitions. [2020-10-13 14:56:51,497 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2157 transitions. Word has length 109 [2020-10-13 14:56:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:51,497 INFO L479 AbstractCegarLoop]: Abstraction has 1461 states and 2157 transitions. [2020-10-13 14:56:51,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2157 transitions. [2020-10-13 14:56:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:56:51,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:51,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:51,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:56:51,501 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1842671910, now seen corresponding path program 1 times [2020-10-13 14:56:51,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:51,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083250154] [2020-10-13 14:56:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:51,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:53,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:56,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:56,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:56:56,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:56:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4839 [2020-10-13 14:56:56,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:56:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:56,600 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:56:56,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:56,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:56,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:56,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:56,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:56,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:56:56,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:56,645 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 14:56:56,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083250154] [2020-10-13 14:56:56,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:56,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:56,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193981458] [2020-10-13 14:56:56,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:56,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:56,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:56,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:56,650 INFO L87 Difference]: Start difference. First operand 1461 states and 2157 transitions. Second operand 5 states. [2020-10-13 14:56:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:58,579 INFO L93 Difference]: Finished difference Result 4213 states and 6205 transitions. [2020-10-13 14:56:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:58,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-13 14:56:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:58,592 INFO L225 Difference]: With dead ends: 4213 [2020-10-13 14:56:58,592 INFO L226 Difference]: Without dead ends: 2803 [2020-10-13 14:56:58,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2020-10-13 14:56:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2746. [2020-10-13 14:56:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2746 states. [2020-10-13 14:56:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 4022 transitions. [2020-10-13 14:56:58,858 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 4022 transitions. Word has length 109 [2020-10-13 14:56:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:58,861 INFO L479 AbstractCegarLoop]: Abstraction has 2746 states and 4022 transitions. [2020-10-13 14:56:58,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 4022 transitions. [2020-10-13 14:56:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 14:56:58,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:58,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:58,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:56:58,866 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash 860487696, now seen corresponding path program 1 times [2020-10-13 14:56:58,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:58,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229238632] [2020-10-13 14:56:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:58,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3552 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:02,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:02,642 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:02,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:02,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:02,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:02,671 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 14:57:02,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229238632] [2020-10-13 14:57:02,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:02,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:02,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170662383] [2020-10-13 14:57:02,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:02,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:02,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:02,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:02,674 INFO L87 Difference]: Start difference. First operand 2746 states and 4022 transitions. Second operand 4 states. [2020-10-13 14:57:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:04,895 INFO L93 Difference]: Finished difference Result 8104 states and 11868 transitions. [2020-10-13 14:57:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:04,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-13 14:57:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:04,920 INFO L225 Difference]: With dead ends: 8104 [2020-10-13 14:57:04,920 INFO L226 Difference]: Without dead ends: 5437 [2020-10-13 14:57:04,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2020-10-13 14:57:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 2754. [2020-10-13 14:57:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2754 states. [2020-10-13 14:57:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4030 transitions. [2020-10-13 14:57:05,141 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4030 transitions. Word has length 110 [2020-10-13 14:57:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:05,142 INFO L479 AbstractCegarLoop]: Abstraction has 2754 states and 4030 transitions. [2020-10-13 14:57:05,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4030 transitions. [2020-10-13 14:57:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:57:05,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:05,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:05,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:57:05,146 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash -520070155, now seen corresponding path program 1 times [2020-10-13 14:57:05,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:05,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107985890] [2020-10-13 14:57:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:05,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:06,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:06,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:08,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:08,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:57:08,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3568 [2020-10-13 14:57:08,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:08,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:57:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 14:57:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:08,964 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:08,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:08,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:08,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:08,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:08,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:09,003 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 14:57:09,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107985890] [2020-10-13 14:57:09,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:09,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:09,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222004532] [2020-10-13 14:57:09,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:09,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:09,006 INFO L87 Difference]: Start difference. First operand 2754 states and 4030 transitions. Second operand 4 states. [2020-10-13 14:57:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:11,091 INFO L93 Difference]: Finished difference Result 7374 states and 10897 transitions. [2020-10-13 14:57:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:11,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 14:57:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:11,111 INFO L225 Difference]: With dead ends: 7374 [2020-10-13 14:57:11,111 INFO L226 Difference]: Without dead ends: 5283 [2020-10-13 14:57:11,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2020-10-13 14:57:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 5226. [2020-10-13 14:57:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5226 states. [2020-10-13 14:57:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 7583 transitions. [2020-10-13 14:57:11,474 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 7583 transitions. Word has length 111 [2020-10-13 14:57:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:11,475 INFO L479 AbstractCegarLoop]: Abstraction has 5226 states and 7583 transitions. [2020-10-13 14:57:11,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 7583 transitions. [2020-10-13 14:57:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:57:11,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:11,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:11,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:57:11,481 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1881536504, now seen corresponding path program 1 times [2020-10-13 14:57:11,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:11,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199322404] [2020-10-13 14:57:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:11,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:16,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:57:16,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:16,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4609 [2020-10-13 14:57:16,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:16,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:57:16,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:16,345 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:16,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:16,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:16,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:16,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:16,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:16,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:16,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:16,378 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 14:57:16,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199322404] [2020-10-13 14:57:16,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:16,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:16,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950255106] [2020-10-13 14:57:16,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:16,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:16,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:16,380 INFO L87 Difference]: Start difference. First operand 5226 states and 7583 transitions. Second operand 5 states. [2020-10-13 14:57:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:17,991 INFO L93 Difference]: Finished difference Result 11362 states and 16182 transitions. [2020-10-13 14:57:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:17,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-13 14:57:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:18,010 INFO L225 Difference]: With dead ends: 11362 [2020-10-13 14:57:18,010 INFO L226 Difference]: Without dead ends: 5793 [2020-10-13 14:57:18,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2020-10-13 14:57:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5736. [2020-10-13 14:57:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5736 states. [2020-10-13 14:57:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 8104 transitions. [2020-10-13 14:57:18,364 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 8104 transitions. Word has length 111 [2020-10-13 14:57:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:18,364 INFO L479 AbstractCegarLoop]: Abstraction has 5736 states and 8104 transitions. [2020-10-13 14:57:18,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 8104 transitions. [2020-10-13 14:57:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:57:18,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:18,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:18,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:57:18,371 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1976442235, now seen corresponding path program 1 times [2020-10-13 14:57:18,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:18,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331005424] [2020-10-13 14:57:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:18,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4812 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:57:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:23,452 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:23,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:23,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:23,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:23,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:23,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:23,478 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 14:57:23,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331005424] [2020-10-13 14:57:23,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:23,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:23,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949362221] [2020-10-13 14:57:23,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:23,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:23,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:23,480 INFO L87 Difference]: Start difference. First operand 5736 states and 8104 transitions. Second operand 5 states. [2020-10-13 14:57:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:24,803 INFO L93 Difference]: Finished difference Result 10751 states and 15357 transitions. [2020-10-13 14:57:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:24,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-13 14:57:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:24,823 INFO L225 Difference]: With dead ends: 10751 [2020-10-13 14:57:24,824 INFO L226 Difference]: Without dead ends: 5430 [2020-10-13 14:57:24,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2020-10-13 14:57:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 5418. [2020-10-13 14:57:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5418 states. [2020-10-13 14:57:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7720 transitions. [2020-10-13 14:57:25,151 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7720 transitions. Word has length 111 [2020-10-13 14:57:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:25,151 INFO L479 AbstractCegarLoop]: Abstraction has 5418 states and 7720 transitions. [2020-10-13 14:57:25,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7720 transitions. [2020-10-13 14:57:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:57:25,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:25,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:25,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:57:25,157 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:25,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1781881653, now seen corresponding path program 1 times [2020-10-13 14:57:25,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:25,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247307660] [2020-10-13 14:57:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:25,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:30,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:57:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:30,427 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:30,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:30,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:30,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:30,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:30,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:30,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:30,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:30,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:30,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:30,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:30,450 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 14:57:30,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247307660] [2020-10-13 14:57:30,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:30,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:30,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129738289] [2020-10-13 14:57:30,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:30,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:30,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:30,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:30,452 INFO L87 Difference]: Start difference. First operand 5418 states and 7720 transitions. Second operand 4 states. [2020-10-13 14:57:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:32,346 INFO L93 Difference]: Finished difference Result 11002 states and 16303 transitions. [2020-10-13 14:57:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:32,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 14:57:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:32,363 INFO L225 Difference]: With dead ends: 11002 [2020-10-13 14:57:32,364 INFO L226 Difference]: Without dead ends: 7554 [2020-10-13 14:57:32,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7554 states. [2020-10-13 14:57:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7554 to 7340. [2020-10-13 14:57:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7340 states. [2020-10-13 14:57:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 10737 transitions. [2020-10-13 14:57:32,946 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 10737 transitions. Word has length 111 [2020-10-13 14:57:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:32,947 INFO L479 AbstractCegarLoop]: Abstraction has 7340 states and 10737 transitions. [2020-10-13 14:57:32,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 10737 transitions. [2020-10-13 14:57:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:57:32,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:32,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:32,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:57:32,953 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1934301316, now seen corresponding path program 1 times [2020-10-13 14:57:32,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:32,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627009016] [2020-10-13 14:57:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:37,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 14:57:37,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:37,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4276 [2020-10-13 14:57:37,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:57:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:37,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:37,462 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:37,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:37,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:37,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:37,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:37,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:37,485 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 14:57:37,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627009016] [2020-10-13 14:57:37,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:37,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:37,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964760393] [2020-10-13 14:57:37,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:37,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:37,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:37,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:37,487 INFO L87 Difference]: Start difference. First operand 7340 states and 10737 transitions. Second operand 4 states. [2020-10-13 14:57:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:39,950 INFO L93 Difference]: Finished difference Result 17859 states and 26161 transitions. [2020-10-13 14:57:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:39,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-13 14:57:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:39,984 INFO L225 Difference]: With dead ends: 17859 [2020-10-13 14:57:39,984 INFO L226 Difference]: Without dead ends: 14493 [2020-10-13 14:57:39,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14493 states. [2020-10-13 14:57:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14493 to 7356. [2020-10-13 14:57:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7356 states. [2020-10-13 14:57:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7356 states to 7356 states and 10753 transitions. [2020-10-13 14:57:40,684 INFO L78 Accepts]: Start accepts. Automaton has 7356 states and 10753 transitions. Word has length 112 [2020-10-13 14:57:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:40,685 INFO L479 AbstractCegarLoop]: Abstraction has 7356 states and 10753 transitions. [2020-10-13 14:57:40,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7356 states and 10753 transitions. [2020-10-13 14:57:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:57:40,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:40,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:40,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:57:40,691 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1488016140, now seen corresponding path program 1 times [2020-10-13 14:57:40,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:40,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405316146] [2020-10-13 14:57:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:40,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:42,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:43,151 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:43,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:43,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:43,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:43,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:43,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:43,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:43,286 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 14:57:43,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405316146] [2020-10-13 14:57:43,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:43,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:43,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993814586] [2020-10-13 14:57:43,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:43,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:43,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:43,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:43,289 INFO L87 Difference]: Start difference. First operand 7356 states and 10753 transitions. Second operand 4 states. [2020-10-13 14:57:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:45,375 INFO L93 Difference]: Finished difference Result 17447 states and 26503 transitions. [2020-10-13 14:57:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:45,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-13 14:57:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:45,404 INFO L225 Difference]: With dead ends: 17447 [2020-10-13 14:57:45,404 INFO L226 Difference]: Without dead ends: 11580 [2020-10-13 14:57:45,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2020-10-13 14:57:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 11114. [2020-10-13 14:57:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11114 states. [2020-10-13 14:57:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 16705 transitions. [2020-10-13 14:57:46,260 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 16705 transitions. Word has length 113 [2020-10-13 14:57:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:46,260 INFO L479 AbstractCegarLoop]: Abstraction has 11114 states and 16705 transitions. [2020-10-13 14:57:46,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 16705 transitions. [2020-10-13 14:57:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:57:46,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:46,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:46,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:57:46,267 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1456684009, now seen corresponding path program 1 times [2020-10-13 14:57:46,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:46,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803550511] [2020-10-13 14:57:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:51,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:57:51,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:57:51,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:57:51,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:51,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:51,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:51,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:57:51,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:51,525 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:51,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:51,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:51,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:51,549 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 14:57:51,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803550511] [2020-10-13 14:57:51,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:51,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:51,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424019433] [2020-10-13 14:57:51,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:51,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:51,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:51,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:51,552 INFO L87 Difference]: Start difference. First operand 11114 states and 16705 transitions. Second operand 5 states. [2020-10-13 14:57:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:54,628 INFO L93 Difference]: Finished difference Result 30425 states and 45616 transitions. [2020-10-13 14:57:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:54,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2020-10-13 14:57:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:54,655 INFO L225 Difference]: With dead ends: 30425 [2020-10-13 14:57:54,656 INFO L226 Difference]: Without dead ends: 19654 [2020-10-13 14:57:54,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19654 states. [2020-10-13 14:57:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19654 to 19621. [2020-10-13 14:57:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19621 states. [2020-10-13 14:57:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19621 states to 19621 states and 29027 transitions. [2020-10-13 14:57:55,848 INFO L78 Accepts]: Start accepts. Automaton has 19621 states and 29027 transitions. Word has length 113 [2020-10-13 14:57:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:55,849 INFO L479 AbstractCegarLoop]: Abstraction has 19621 states and 29027 transitions. [2020-10-13 14:57:55,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19621 states and 29027 transitions. [2020-10-13 14:57:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:57:55,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:55,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:55,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:57:55,857 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1279021798, now seen corresponding path program 1 times [2020-10-13 14:57:55,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:55,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739884704] [2020-10-13 14:57:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:56,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:57,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:58:01,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:01,269 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:58:01,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:01,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:01,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:01,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:01,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:01,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:01,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:01,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:01,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:01,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:01,292 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 14:58:01,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739884704] [2020-10-13 14:58:01,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:01,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:01,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963890131] [2020-10-13 14:58:01,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:01,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:01,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:01,294 INFO L87 Difference]: Start difference. First operand 19621 states and 29027 transitions. Second operand 5 states. [2020-10-13 14:58:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:03,364 INFO L93 Difference]: Finished difference Result 31080 states and 46496 transitions. [2020-10-13 14:58:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:03,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2020-10-13 14:58:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:03,381 INFO L225 Difference]: With dead ends: 31080 [2020-10-13 14:58:03,381 INFO L226 Difference]: Without dead ends: 15444 [2020-10-13 14:58:03,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15444 states. [2020-10-13 14:58:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15444 to 15418. [2020-10-13 14:58:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15418 states. [2020-10-13 14:58:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15418 states to 15418 states and 22830 transitions. [2020-10-13 14:58:04,309 INFO L78 Accepts]: Start accepts. Automaton has 15418 states and 22830 transitions. Word has length 113 [2020-10-13 14:58:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:04,309 INFO L479 AbstractCegarLoop]: Abstraction has 15418 states and 22830 transitions. [2020-10-13 14:58:04,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 15418 states and 22830 transitions. [2020-10-13 14:58:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 14:58:04,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:04,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:04,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:58:04,314 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:04,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1301712650, now seen corresponding path program 1 times [2020-10-13 14:58:04,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:04,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838558625] [2020-10-13 14:58:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:09,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:09,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 14:58:09,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:58:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:58:09,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 14:58:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 14:58:09,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:09,582 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:58:09,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:09,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:09,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:09,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:09,611 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 14:58:09,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838558625] [2020-10-13 14:58:09,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:09,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:09,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627774749] [2020-10-13 14:58:09,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:09,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:09,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:09,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:09,613 INFO L87 Difference]: Start difference. First operand 15418 states and 22830 transitions. Second operand 5 states. [2020-10-13 14:58:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:11,565 INFO L93 Difference]: Finished difference Result 18144 states and 26943 transitions. [2020-10-13 14:58:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:11,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-13 14:58:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:11,580 INFO L225 Difference]: With dead ends: 18144 [2020-10-13 14:58:11,581 INFO L226 Difference]: Without dead ends: 13108 [2020-10-13 14:58:11,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2020-10-13 14:58:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 13094. [2020-10-13 14:58:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13094 states. [2020-10-13 14:58:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13094 states to 13094 states and 19374 transitions. [2020-10-13 14:58:12,369 INFO L78 Accepts]: Start accepts. Automaton has 13094 states and 19374 transitions. Word has length 118 [2020-10-13 14:58:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:12,369 INFO L479 AbstractCegarLoop]: Abstraction has 13094 states and 19374 transitions. [2020-10-13 14:58:12,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13094 states and 19374 transitions. [2020-10-13 14:58:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 14:58:12,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:12,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:12,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:58:12,373 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1553094713, now seen corresponding path program 1 times [2020-10-13 14:58:12,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:12,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638374137] [2020-10-13 14:58:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:12,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:15,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 14:58:17,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:58:17,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:58:17,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 14:58:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:58:17,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,627 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:58:17,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:17,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:17,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:17,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:58:17,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:17,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,662 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 14:58:17,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638374137] [2020-10-13 14:58:17,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:17,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:17,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356320793] [2020-10-13 14:58:17,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:17,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:17,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:17,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:17,665 INFO L87 Difference]: Start difference. First operand 13094 states and 19374 transitions. Second operand 5 states. [2020-10-13 14:58:17,886 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:58:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:21,467 INFO L93 Difference]: Finished difference Result 44268 states and 68081 transitions. [2020-10-13 14:58:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:58:21,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-13 14:58:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:21,513 INFO L225 Difference]: With dead ends: 44268 [2020-10-13 14:58:21,513 INFO L226 Difference]: Without dead ends: 33490 [2020-10-13 14:58:21,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33490 states. [2020-10-13 14:58:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33490 to 33438. [2020-10-13 14:58:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33438 states. [2020-10-13 14:58:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33438 states to 33438 states and 51130 transitions. [2020-10-13 14:58:23,855 INFO L78 Accepts]: Start accepts. Automaton has 33438 states and 51130 transitions. Word has length 119 [2020-10-13 14:58:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:23,855 INFO L479 AbstractCegarLoop]: Abstraction has 33438 states and 51130 transitions. [2020-10-13 14:58:23,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 33438 states and 51130 transitions. [2020-10-13 14:58:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 14:58:23,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:23,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:23,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:58:23,860 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2131510942, now seen corresponding path program 1 times [2020-10-13 14:58:23,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:23,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969332845] [2020-10-13 14:58:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:23,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:23,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:24,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:24,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:24,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:24,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:24,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:58:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:25,135 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:58:25,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:25,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:25,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:25,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:25,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:25,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:25,181 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 14:58:25,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969332845] [2020-10-13 14:58:25,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:25,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:25,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959775207] [2020-10-13 14:58:25,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:25,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:25,183 INFO L87 Difference]: Start difference. First operand 33438 states and 51130 transitions. Second operand 5 states. [2020-10-13 14:58:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:29,122 INFO L93 Difference]: Finished difference Result 55319 states and 84664 transitions. [2020-10-13 14:58:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:29,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-13 14:58:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:29,171 INFO L225 Difference]: With dead ends: 55319 [2020-10-13 14:58:29,172 INFO L226 Difference]: Without dead ends: 31060 [2020-10-13 14:58:29,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31060 states. [2020-10-13 14:58:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31060 to 30742. [2020-10-13 14:58:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30742 states. [2020-10-13 14:58:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30742 states to 30742 states and 47050 transitions. [2020-10-13 14:58:32,485 INFO L78 Accepts]: Start accepts. Automaton has 30742 states and 47050 transitions. Word has length 119 [2020-10-13 14:58:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:32,485 INFO L479 AbstractCegarLoop]: Abstraction has 30742 states and 47050 transitions. [2020-10-13 14:58:32,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30742 states and 47050 transitions. [2020-10-13 14:58:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 14:58:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:32,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:32,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:58:32,489 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1959650625, now seen corresponding path program 1 times [2020-10-13 14:58:32,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:32,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134352425] [2020-10-13 14:58:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:32,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:33,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:33,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 14:58:33,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:58:33,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-13 14:58:33,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:33,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:33,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:33,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:58:33,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:33,463 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:58:33,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:33,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:33,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:33,512 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 14:58:33,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134352425] [2020-10-13 14:58:33,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:33,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:33,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144244303] [2020-10-13 14:58:33,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:33,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:33,514 INFO L87 Difference]: Start difference. First operand 30742 states and 47050 transitions. Second operand 5 states. [2020-10-13 14:58:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:37,184 INFO L93 Difference]: Finished difference Result 38245 states and 58536 transitions. [2020-10-13 14:58:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:37,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-13 14:58:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:37,217 INFO L225 Difference]: With dead ends: 38245 [2020-10-13 14:58:37,217 INFO L226 Difference]: Without dead ends: 28470 [2020-10-13 14:58:37,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28470 states. [2020-10-13 14:58:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28470 to 28323. [2020-10-13 14:58:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28323 states. [2020-10-13 14:58:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28323 states to 28323 states and 43331 transitions. [2020-10-13 14:58:39,626 INFO L78 Accepts]: Start accepts. Automaton has 28323 states and 43331 transitions. Word has length 121 [2020-10-13 14:58:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:39,626 INFO L479 AbstractCegarLoop]: Abstraction has 28323 states and 43331 transitions. [2020-10-13 14:58:39,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 28323 states and 43331 transitions. [2020-10-13 14:58:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 14:58:39,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:39,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:39,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:58:39,630 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1638914725, now seen corresponding path program 1 times [2020-10-13 14:58:39,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:39,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388433264] [2020-10-13 14:58:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:39,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:43,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4225 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:58:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:44,119 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:58:44,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:44,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:44,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:44,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:44,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:44,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:44,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:44,147 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 14:58:44,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388433264] [2020-10-13 14:58:44,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:44,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:58:44,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729564707] [2020-10-13 14:58:44,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:58:44,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:58:44,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:58:44,149 INFO L87 Difference]: Start difference. First operand 28323 states and 43331 transitions. Second operand 7 states. [2020-10-13 14:58:44,374 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:59:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:04,378 INFO L93 Difference]: Finished difference Result 212610 states and 329718 transitions. [2020-10-13 14:59:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:59:04,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-13 14:59:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:04,692 INFO L225 Difference]: With dead ends: 212610 [2020-10-13 14:59:04,692 INFO L226 Difference]: Without dead ends: 185590 [2020-10-13 14:59:04,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:59:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185590 states. [2020-10-13 14:59:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185590 to 159393. [2020-10-13 14:59:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159393 states. [2020-10-13 14:59:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159393 states to 159393 states and 246045 transitions. [2020-10-13 14:59:23,449 INFO L78 Accepts]: Start accepts. Automaton has 159393 states and 246045 transitions. Word has length 123 [2020-10-13 14:59:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:23,449 INFO L479 AbstractCegarLoop]: Abstraction has 159393 states and 246045 transitions. [2020-10-13 14:59:23,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:59:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 159393 states and 246045 transitions. [2020-10-13 14:59:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 14:59:23,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:23,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:23,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:59:23,455 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:23,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:23,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1014224768, now seen corresponding path program 1 times [2020-10-13 14:59:23,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:23,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211558930] [2020-10-13 14:59:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:23,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:24,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:59:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 14:59:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:24,636 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:59:24,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:24,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:24,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:24,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:24,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:59:24,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:59:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:24,679 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 14:59:24,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211558930] [2020-10-13 14:59:24,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:24,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:24,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427025799] [2020-10-13 14:59:24,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:59:24,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:59:24,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:24,680 INFO L87 Difference]: Start difference. First operand 159393 states and 246045 transitions. Second operand 6 states. [2020-10-13 14:59:24,924 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:59:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:39,407 INFO L93 Difference]: Finished difference Result 290254 states and 448848 transitions. [2020-10-13 14:59:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:59:39,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-10-13 14:59:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:39,624 INFO L225 Difference]: With dead ends: 290254 [2020-10-13 14:59:39,624 INFO L226 Difference]: Without dead ends: 133199 [2020-10-13 14:59:39,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:59:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133199 states.