/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:24:23,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:24:23,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:24:23,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:24:23,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:24:23,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:24:23,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:24:23,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:24:23,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:24:23,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:24:23,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:24:23,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:24:23,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:24:23,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:24:23,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:24:23,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:24:23,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:24:23,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:24:23,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:24:23,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:24:23,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:24:23,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:24:23,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:24:23,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:24:23,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:24:23,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:24:23,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:24:23,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:24:23,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:24:23,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:24:23,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:24:23,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:24:23,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:24:23,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:24:23,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:24:23,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:24:23,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:24:23,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:24:23,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:24:23,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:24:23,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:24:23,665 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 [2020-10-14 09:24:23,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:24:23,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:24:23,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:24:23,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:24:23,696 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:24:23,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:24:23,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:24:23,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:24:23,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:24:23,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:24:23,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:24:23,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:24:23,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:24:23,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:24:23,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:24:23,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:24:23,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:24:23,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:24:23,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:24:23,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:24:23,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:24:23,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:24:23,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:24:23,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:24:23,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:24:23,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:24:23,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:24:23,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:24:23,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:24:23,703 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:24:24,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:24:24,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:24:24,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:24:24,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:24:24,019 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:24:24,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:24:24,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ac329d8a/95cc0dd8ef3a4146a40214d9915b1612/FLAGdb7c522bf [2020-10-14 09:24:24,579 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:24:24,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:24:24,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ac329d8a/95cc0dd8ef3a4146a40214d9915b1612/FLAGdb7c522bf [2020-10-14 09:24:24,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ac329d8a/95cc0dd8ef3a4146a40214d9915b1612 [2020-10-14 09:24:24,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:24:24,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:24:24,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:24:24,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:24:24,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:24:24,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:24:24" (1/1) ... [2020-10-14 09:24:24,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156d188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:24, skipping insertion in model container [2020-10-14 09:24:24,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:24:24" (1/1) ... [2020-10-14 09:24:24,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:24:25,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:24:25,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:24:25,420 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:24:25,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:24:25,545 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:24:25,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25 WrapperNode [2020-10-14 09:24:25,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:24:25,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:24:25,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:24:25,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:24:25,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (1/1) ... [2020-10-14 09:24:25,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:24:25,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:24:25,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:24:25,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:24:25,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (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 [2020-10-14 09:24:25,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:24:25,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:24:25,667 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:24:25,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:24:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:24:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:24:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:24:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:24:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:24:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:24:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:24:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:24:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:24:25,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:24:26,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:24:26,408 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:24:26,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:24:26 BoogieIcfgContainer [2020-10-14 09:24:26,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:24:26,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:24:26,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:24:26,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:24:26,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:24:24" (1/3) ... [2020-10-14 09:24:26,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265b71ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:24:26, skipping insertion in model container [2020-10-14 09:24:26,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:25" (2/3) ... [2020-10-14 09:24:26,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265b71ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:24:26, skipping insertion in model container [2020-10-14 09:24:26,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:24:26" (3/3) ... [2020-10-14 09:24:26,422 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:24:26,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:24:26,442 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:24:26,456 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:24:26,482 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:24:26,483 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:24:26,483 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:24:26,483 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:24:26,484 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:24:26,484 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:24:26,484 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:24:26,484 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:24:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-14 09:24:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:24:26,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:26,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:24:26,522 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:26,528 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-14 09:24:26,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:26,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873861465] [2020-10-14 09:24:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:27,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:27,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:28,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:28,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:24:28,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:24:28,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1973 [2020-10-14 09:24:28,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:28,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:24:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:24:28,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:24:29,204 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:29,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:29,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:29,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:29,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:29,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:29,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:24:29,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:29,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:29,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:29,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873861465] [2020-10-14 09:24:29,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:29,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:29,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249682415] [2020-10-14 09:24:29,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:29,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:29,286 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2020-10-14 09:24:29,549 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:24:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:30,297 INFO L93 Difference]: Finished difference Result 332 states and 558 transitions. [2020-10-14 09:24:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:30,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:24:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:30,314 INFO L225 Difference]: With dead ends: 332 [2020-10-14 09:24:30,314 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 09:24:30,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 09:24:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-10-14 09:24:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-14 09:24:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 361 transitions. [2020-10-14 09:24:30,397 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 361 transitions. Word has length 66 [2020-10-14 09:24:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:30,398 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 361 transitions. [2020-10-14 09:24:30,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 361 transitions. [2020-10-14 09:24:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:24:30,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:30,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:24:30,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:24:30,407 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:30,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:30,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1367795633, now seen corresponding path program 1 times [2020-10-14 09:24:30,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:30,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686404541] [2020-10-14 09:24:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:30,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:34,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:24:34,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:24:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3750 [2020-10-14 09:24:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:34,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:24:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:24:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:34,426 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:34,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:34,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:34,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:34,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:34,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:24:34,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:34,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:34,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:34,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:34,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:34,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686404541] [2020-10-14 09:24:34,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:34,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:34,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835433643] [2020-10-14 09:24:34,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:34,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:34,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:34,495 INFO L87 Difference]: Start difference. First operand 229 states and 361 transitions. Second operand 4 states. [2020-10-14 09:24:34,683 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:24:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:35,267 INFO L93 Difference]: Finished difference Result 549 states and 897 transitions. [2020-10-14 09:24:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:35,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:24:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:35,273 INFO L225 Difference]: With dead ends: 549 [2020-10-14 09:24:35,275 INFO L226 Difference]: Without dead ends: 381 [2020-10-14 09:24:35,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-14 09:24:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2020-10-14 09:24:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 09:24:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 612 transitions. [2020-10-14 09:24:35,324 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 612 transitions. Word has length 68 [2020-10-14 09:24:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:35,324 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 612 transitions. [2020-10-14 09:24:35,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 612 transitions. [2020-10-14 09:24:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:24:35,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:35,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:24:35,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:24:35,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash -172135024, now seen corresponding path program 1 times [2020-10-14 09:24:35,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:35,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630269206] [2020-10-14 09:24:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:35,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:35,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:36,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:36,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:40,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:40,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:24:40,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:24:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:24:40,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:40,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:24:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:24:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:40,568 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:40,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:40,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:40,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:40,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:40,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:40,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:24:40,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:40,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:40,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:40,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:40,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630269206] [2020-10-14 09:24:40,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:40,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:40,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387357399] [2020-10-14 09:24:40,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:40,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:40,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:40,604 INFO L87 Difference]: Start difference. First operand 379 states and 612 transitions. Second operand 4 states. [2020-10-14 09:24:40,783 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:24:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:41,363 INFO L93 Difference]: Finished difference Result 975 states and 1606 transitions. [2020-10-14 09:24:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:41,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:24:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:41,369 INFO L225 Difference]: With dead ends: 975 [2020-10-14 09:24:41,369 INFO L226 Difference]: Without dead ends: 657 [2020-10-14 09:24:41,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-14 09:24:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 655. [2020-10-14 09:24:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2020-10-14 09:24:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1052 transitions. [2020-10-14 09:24:41,404 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1052 transitions. Word has length 70 [2020-10-14 09:24:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:41,405 INFO L479 AbstractCegarLoop]: Abstraction has 655 states and 1052 transitions. [2020-10-14 09:24:41,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1052 transitions. [2020-10-14 09:24:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:24:41,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:41,408 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] [2020-10-14 09:24:41,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:24:41,409 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:41,409 INFO L82 PathProgramCache]: Analyzing trace with hash 575795729, now seen corresponding path program 1 times [2020-10-14 09:24:41,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:41,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466819096] [2020-10-14 09:24:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:41,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:41,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:41,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:44,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:46,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:46,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:24:46,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:24:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:24:46,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:46,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:24:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:46,833 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:46,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:46,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:46,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:46,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:46,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 09:24:46,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:46,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:24:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:46,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466819096] [2020-10-14 09:24:46,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:46,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:46,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207351382] [2020-10-14 09:24:46,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:46,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:46,931 INFO L87 Difference]: Start difference. First operand 655 states and 1052 transitions. Second operand 5 states. [2020-10-14 09:24:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:48,028 INFO L93 Difference]: Finished difference Result 1850 states and 2991 transitions. [2020-10-14 09:24:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:48,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 09:24:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:48,037 INFO L225 Difference]: With dead ends: 1850 [2020-10-14 09:24:48,038 INFO L226 Difference]: Without dead ends: 1256 [2020-10-14 09:24:48,044 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 [2020-10-14 09:24:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-10-14 09:24:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1254. [2020-10-14 09:24:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2020-10-14 09:24:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 2005 transitions. [2020-10-14 09:24:48,155 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 2005 transitions. Word has length 72 [2020-10-14 09:24:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:48,155 INFO L479 AbstractCegarLoop]: Abstraction has 1254 states and 2005 transitions. [2020-10-14 09:24:48,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 2005 transitions. [2020-10-14 09:24:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:24:48,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:48,163 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] [2020-10-14 09:24:48,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:24:48,164 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1092508768, now seen corresponding path program 1 times [2020-10-14 09:24:48,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:48,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375710715] [2020-10-14 09:24:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:48,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:48,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:48,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:48,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:48,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:51,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:53,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:53,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:24:53,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:53,395 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:53,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:53,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:53,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:53,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:53,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:53,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:53,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375710715] [2020-10-14 09:24:53,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:53,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:53,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951548496] [2020-10-14 09:24:53,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:53,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:53,424 INFO L87 Difference]: Start difference. First operand 1254 states and 2005 transitions. Second operand 4 states. [2020-10-14 09:24:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:54,477 INFO L93 Difference]: Finished difference Result 2928 states and 4745 transitions. [2020-10-14 09:24:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:54,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:24:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:54,503 INFO L225 Difference]: With dead ends: 2928 [2020-10-14 09:24:54,504 INFO L226 Difference]: Without dead ends: 1786 [2020-10-14 09:24:54,507 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 [2020-10-14 09:24:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2020-10-14 09:24:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1744. [2020-10-14 09:24:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2020-10-14 09:24:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2787 transitions. [2020-10-14 09:24:54,664 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2787 transitions. Word has length 73 [2020-10-14 09:24:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:54,668 INFO L479 AbstractCegarLoop]: Abstraction has 1744 states and 2787 transitions. [2020-10-14 09:24:54,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2787 transitions. [2020-10-14 09:24:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:24:54,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:54,671 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] [2020-10-14 09:24:54,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:24:54,671 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash 572101172, now seen corresponding path program 1 times [2020-10-14 09:24:54,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:54,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323879072] [2020-10-14 09:24:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:56,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:59,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:24:59,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:24:59,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:24:59,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:59,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 09:24:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:24:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:59,966 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:59,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:59,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:59,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:59,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:24:59,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:59,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:59,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:59,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323879072] [2020-10-14 09:24:59,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:59,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:59,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154610248] [2020-10-14 09:24:59,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:59,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:59,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:59,994 INFO L87 Difference]: Start difference. First operand 1744 states and 2787 transitions. Second operand 4 states. [2020-10-14 09:25:00,180 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:25:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:00,899 INFO L93 Difference]: Finished difference Result 3444 states and 5555 transitions. [2020-10-14 09:25:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:00,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:25:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:00,912 INFO L225 Difference]: With dead ends: 3444 [2020-10-14 09:25:00,913 INFO L226 Difference]: Without dead ends: 2350 [2020-10-14 09:25:00,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-10-14 09:25:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2348. [2020-10-14 09:25:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2348 states. [2020-10-14 09:25:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 3753 transitions. [2020-10-14 09:25:01,077 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 3753 transitions. Word has length 73 [2020-10-14 09:25:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:01,078 INFO L479 AbstractCegarLoop]: Abstraction has 2348 states and 3753 transitions. [2020-10-14 09:25:01,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 3753 transitions. [2020-10-14 09:25:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:01,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:01,080 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] [2020-10-14 09:25:01,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:25:01,081 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 853067612, now seen corresponding path program 1 times [2020-10-14 09:25:01,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:01,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357203903] [2020-10-14 09:25:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:04,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:06,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:06,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:06,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:25:06,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:06,425 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:06,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:06,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:06,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:06,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:06,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:25:06,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:06,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:06,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357203903] [2020-10-14 09:25:06,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:06,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:06,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704206818] [2020-10-14 09:25:06,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:06,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:06,469 INFO L87 Difference]: Start difference. First operand 2348 states and 3753 transitions. Second operand 4 states. [2020-10-14 09:25:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:07,644 INFO L93 Difference]: Finished difference Result 6954 states and 11109 transitions. [2020-10-14 09:25:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:07,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:25:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:07,669 INFO L225 Difference]: With dead ends: 6954 [2020-10-14 09:25:07,669 INFO L226 Difference]: Without dead ends: 4654 [2020-10-14 09:25:07,678 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 [2020-10-14 09:25:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2020-10-14 09:25:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 2354. [2020-10-14 09:25:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2354 states. [2020-10-14 09:25:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 3761 transitions. [2020-10-14 09:25:07,879 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 3761 transitions. Word has length 73 [2020-10-14 09:25:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:07,879 INFO L479 AbstractCegarLoop]: Abstraction has 2354 states and 3761 transitions. [2020-10-14 09:25:07,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 3761 transitions. [2020-10-14 09:25:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:25:07,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:07,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:07,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:25:07,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 341002258, now seen corresponding path program 1 times [2020-10-14 09:25:07,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:07,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484529853] [2020-10-14 09:25:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:07,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:12,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:25:12,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:25:12,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:13,138 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:13,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:13,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:13,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:13,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:13,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:25:13,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:13,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:13,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:13,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484529853] [2020-10-14 09:25:13,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:13,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:13,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279829187] [2020-10-14 09:25:13,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:13,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:13,197 INFO L87 Difference]: Start difference. First operand 2354 states and 3761 transitions. Second operand 5 states. [2020-10-14 09:25:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:14,193 INFO L93 Difference]: Finished difference Result 6826 states and 10901 transitions. [2020-10-14 09:25:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:14,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 09:25:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:14,215 INFO L225 Difference]: With dead ends: 6826 [2020-10-14 09:25:14,215 INFO L226 Difference]: Without dead ends: 4497 [2020-10-14 09:25:14,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:25:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2020-10-14 09:25:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 4495. [2020-10-14 09:25:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4495 states. [2020-10-14 09:25:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 7131 transitions. [2020-10-14 09:25:14,507 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 7131 transitions. Word has length 74 [2020-10-14 09:25:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:14,508 INFO L479 AbstractCegarLoop]: Abstraction has 4495 states and 7131 transitions. [2020-10-14 09:25:14,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 7131 transitions. [2020-10-14 09:25:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:25:14,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:14,511 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] [2020-10-14 09:25:14,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:25:14,511 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2041410011, now seen corresponding path program 1 times [2020-10-14 09:25:14,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:14,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145938940] [2020-10-14 09:25:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:14,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:15,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:18,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:19,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:19,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:25:19,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:25:19,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:19,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:25:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:25:19,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:19,727 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:19,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:19,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:19,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:19,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:19,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:25:19,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:19,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:19,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:19,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145938940] [2020-10-14 09:25:19,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:19,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:19,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621477301] [2020-10-14 09:25:19,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:19,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:19,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:19,761 INFO L87 Difference]: Start difference. First operand 4495 states and 7131 transitions. Second operand 4 states. [2020-10-14 09:25:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:20,704 INFO L93 Difference]: Finished difference Result 13198 states and 20981 transitions. [2020-10-14 09:25:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:20,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:25:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:20,746 INFO L225 Difference]: With dead ends: 13198 [2020-10-14 09:25:20,746 INFO L226 Difference]: Without dead ends: 8957 [2020-10-14 09:25:20,757 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 [2020-10-14 09:25:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2020-10-14 09:25:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 4501. [2020-10-14 09:25:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2020-10-14 09:25:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 7139 transitions. [2020-10-14 09:25:21,112 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 7139 transitions. Word has length 75 [2020-10-14 09:25:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:21,113 INFO L479 AbstractCegarLoop]: Abstraction has 4501 states and 7139 transitions. [2020-10-14 09:25:21,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 7139 transitions. [2020-10-14 09:25:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:25:21,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:21,116 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] [2020-10-14 09:25:21,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:25:21,116 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash 337837947, now seen corresponding path program 1 times [2020-10-14 09:25:21,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:21,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487710782] [2020-10-14 09:25:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:21,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:26,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:26,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:25:26,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:25:26,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:26,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 09:25:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:25:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:26,323 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:26,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:26,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:26,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:26,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:25:26,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:26,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:26,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:26,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487710782] [2020-10-14 09:25:26,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:26,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:26,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540197921] [2020-10-14 09:25:26,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:26,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:26,348 INFO L87 Difference]: Start difference. First operand 4501 states and 7139 transitions. Second operand 4 states. [2020-10-14 09:25:26,542 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:25:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:27,459 INFO L93 Difference]: Finished difference Result 8121 states and 12997 transitions. [2020-10-14 09:25:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:27,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:25:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:27,476 INFO L225 Difference]: With dead ends: 8121 [2020-10-14 09:25:27,476 INFO L226 Difference]: Without dead ends: 5931 [2020-10-14 09:25:27,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5931 states. [2020-10-14 09:25:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5931 to 5929. [2020-10-14 09:25:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5929 states. [2020-10-14 09:25:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5929 states to 5929 states and 9415 transitions. [2020-10-14 09:25:27,800 INFO L78 Accepts]: Start accepts. Automaton has 5929 states and 9415 transitions. Word has length 75 [2020-10-14 09:25:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:27,800 INFO L479 AbstractCegarLoop]: Abstraction has 5929 states and 9415 transitions. [2020-10-14 09:25:27,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5929 states and 9415 transitions. [2020-10-14 09:25:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:25:27,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:27,803 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] [2020-10-14 09:25:27,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:25:27,803 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash -328601019, now seen corresponding path program 1 times [2020-10-14 09:25:27,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:27,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648971876] [2020-10-14 09:25:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:27,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:27,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:27,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:27,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:32,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:32,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:25:32,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:32,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:25:32,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:32,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:25:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:25:32,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:33,006 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:33,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:33,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:33,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:33,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:33,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:33,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648971876] [2020-10-14 09:25:33,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:33,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:33,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223342131] [2020-10-14 09:25:33,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:33,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:33,031 INFO L87 Difference]: Start difference. First operand 5929 states and 9415 transitions. Second operand 4 states. [2020-10-14 09:25:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:33,884 INFO L93 Difference]: Finished difference Result 13297 states and 21277 transitions. [2020-10-14 09:25:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:33,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:25:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:33,904 INFO L225 Difference]: With dead ends: 13297 [2020-10-14 09:25:33,904 INFO L226 Difference]: Without dead ends: 7755 [2020-10-14 09:25:33,916 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 [2020-10-14 09:25:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7755 states. [2020-10-14 09:25:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7755 to 7609. [2020-10-14 09:25:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7609 states. [2020-10-14 09:25:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7609 states to 7609 states and 12043 transitions. [2020-10-14 09:25:34,364 INFO L78 Accepts]: Start accepts. Automaton has 7609 states and 12043 transitions. Word has length 75 [2020-10-14 09:25:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:34,364 INFO L479 AbstractCegarLoop]: Abstraction has 7609 states and 12043 transitions. [2020-10-14 09:25:34,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7609 states and 12043 transitions. [2020-10-14 09:25:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:25:34,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:34,366 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] [2020-10-14 09:25:34,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:25:34,367 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash 814109049, now seen corresponding path program 1 times [2020-10-14 09:25:34,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:34,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959039031] [2020-10-14 09:25:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:34,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:34,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:34,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:39,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:39,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:25:39,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:25:39,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:39,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:25:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:25:39,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:39,634 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:39,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:39,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:39,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:39,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:39,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:25:39,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:39,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:39,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:39,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:39,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:39,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:39,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959039031] [2020-10-14 09:25:39,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:39,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:39,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087167405] [2020-10-14 09:25:39,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:39,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:39,669 INFO L87 Difference]: Start difference. First operand 7609 states and 12043 transitions. Second operand 4 states. [2020-10-14 09:25:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:41,089 INFO L93 Difference]: Finished difference Result 21550 states and 34221 transitions. [2020-10-14 09:25:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:41,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 09:25:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:41,126 INFO L225 Difference]: With dead ends: 21550 [2020-10-14 09:25:41,126 INFO L226 Difference]: Without dead ends: 14336 [2020-10-14 09:25:41,144 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 [2020-10-14 09:25:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14336 states. [2020-10-14 09:25:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14336 to 14334. [2020-10-14 09:25:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2020-10-14 09:25:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 22545 transitions. [2020-10-14 09:25:41,978 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 22545 transitions. Word has length 76 [2020-10-14 09:25:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:41,978 INFO L479 AbstractCegarLoop]: Abstraction has 14334 states and 22545 transitions. [2020-10-14 09:25:41,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 22545 transitions. [2020-10-14 09:25:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:25:41,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:41,981 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] [2020-10-14 09:25:41,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:25:41,981 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -314466218, now seen corresponding path program 1 times [2020-10-14 09:25:41,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:41,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744191061] [2020-10-14 09:25:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:42,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:47,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:25:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:25:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:47,206 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:47,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:47,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:47,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:47,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:47,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:25:47,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:47,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:47,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:47,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744191061] [2020-10-14 09:25:47,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:47,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:47,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000787957] [2020-10-14 09:25:47,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:47,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:47,233 INFO L87 Difference]: Start difference. First operand 14334 states and 22545 transitions. Second operand 5 states. [2020-10-14 09:25:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:49,123 INFO L93 Difference]: Finished difference Result 40088 states and 63141 transitions. [2020-10-14 09:25:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:49,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:25:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:49,168 INFO L225 Difference]: With dead ends: 40088 [2020-10-14 09:25:49,168 INFO L226 Difference]: Without dead ends: 26036 [2020-10-14 09:25:49,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:25:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26036 states. [2020-10-14 09:25:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26036 to 26034. [2020-10-14 09:25:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26034 states. [2020-10-14 09:25:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26034 states to 26034 states and 40630 transitions. [2020-10-14 09:25:50,692 INFO L78 Accepts]: Start accepts. Automaton has 26034 states and 40630 transitions. Word has length 76 [2020-10-14 09:25:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:50,692 INFO L479 AbstractCegarLoop]: Abstraction has 26034 states and 40630 transitions. [2020-10-14 09:25:50,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26034 states and 40630 transitions. [2020-10-14 09:25:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:25:50,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:50,696 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] [2020-10-14 09:25:50,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:25:50,696 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2023903507, now seen corresponding path program 1 times [2020-10-14 09:25:50,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:50,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490171927] [2020-10-14 09:25:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:50,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:55,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:55,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:25:55,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:55,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:25:55,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:55,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:25:55,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:25:55,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:55,959 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:55,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:55,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:55,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:55,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:55,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490171927] [2020-10-14 09:25:55,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:55,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:55,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754071503] [2020-10-14 09:25:55,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:55,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:55,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:55,985 INFO L87 Difference]: Start difference. First operand 26034 states and 40630 transitions. Second operand 5 states. [2020-10-14 09:25:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:58,345 INFO L93 Difference]: Finished difference Result 53594 states and 83795 transitions. [2020-10-14 09:25:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:58,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:25:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:58,385 INFO L225 Difference]: With dead ends: 53594 [2020-10-14 09:25:58,385 INFO L226 Difference]: Without dead ends: 28295 [2020-10-14 09:25:58,425 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 [2020-10-14 09:25:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28295 states. [2020-10-14 09:25:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28295 to 26453. [2020-10-14 09:25:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26453 states. [2020-10-14 09:25:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26453 states to 26453 states and 41158 transitions. [2020-10-14 09:25:59,960 INFO L78 Accepts]: Start accepts. Automaton has 26453 states and 41158 transitions. Word has length 76 [2020-10-14 09:25:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:59,960 INFO L479 AbstractCegarLoop]: Abstraction has 26453 states and 41158 transitions. [2020-10-14 09:25:59,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26453 states and 41158 transitions. [2020-10-14 09:25:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:25:59,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:59,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:59,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:25:59,965 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:59,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1036526146, now seen corresponding path program 1 times [2020-10-14 09:25:59,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:59,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655084953] [2020-10-14 09:25:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:59,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:04,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:04,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:26:04,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:26:04,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:26:04,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:04,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:26:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 09:26:04,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:05,182 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:05,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:05,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:05,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:05,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:05,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:05,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:05,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:05,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:05,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:05,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:05,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:05,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:05,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655084953] [2020-10-14 09:26:05,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:05,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:05,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266278256] [2020-10-14 09:26:05,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:05,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:05,367 INFO L87 Difference]: Start difference. First operand 26453 states and 41158 transitions. Second operand 4 states. [2020-10-14 09:26:05,562 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:26:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:08,174 INFO L93 Difference]: Finished difference Result 49145 states and 78144 transitions. [2020-10-14 09:26:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:08,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:26:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:08,228 INFO L225 Difference]: With dead ends: 49145 [2020-10-14 09:26:08,228 INFO L226 Difference]: Without dead ends: 35187 [2020-10-14 09:26:08,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35187 states. [2020-10-14 09:26:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35187 to 35185. [2020-10-14 09:26:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35185 states. [2020-10-14 09:26:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35185 states to 35185 states and 55214 transitions. [2020-10-14 09:26:10,447 INFO L78 Accepts]: Start accepts. Automaton has 35185 states and 55214 transitions. Word has length 77 [2020-10-14 09:26:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:10,448 INFO L479 AbstractCegarLoop]: Abstraction has 35185 states and 55214 transitions. [2020-10-14 09:26:10,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 35185 states and 55214 transitions. [2020-10-14 09:26:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:26:10,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:10,451 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] [2020-10-14 09:26:10,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:26:10,451 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2106237914, now seen corresponding path program 1 times [2020-10-14 09:26:10,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:10,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751305473] [2020-10-14 09:26:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:10,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:15,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:26:15,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:26:15,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:26:15,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:15,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 09:26:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:26:15,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:15,675 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:15,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:15,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:15,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:15,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:15,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751305473] [2020-10-14 09:26:15,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:15,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:15,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835684298] [2020-10-14 09:26:15,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:15,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:15,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:15,695 INFO L87 Difference]: Start difference. First operand 35185 states and 55214 transitions. Second operand 4 states. [2020-10-14 09:26:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:18,909 INFO L93 Difference]: Finished difference Result 80965 states and 128224 transitions. [2020-10-14 09:26:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:18,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:26:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:18,971 INFO L225 Difference]: With dead ends: 80965 [2020-10-14 09:26:18,972 INFO L226 Difference]: Without dead ends: 46655 [2020-10-14 09:26:19,011 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 [2020-10-14 09:26:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46655 states. [2020-10-14 09:26:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46655 to 45565. [2020-10-14 09:26:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45565 states. [2020-10-14 09:26:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45565 states to 45565 states and 71518 transitions. [2020-10-14 09:26:23,677 INFO L78 Accepts]: Start accepts. Automaton has 45565 states and 71518 transitions. Word has length 77 [2020-10-14 09:26:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:23,677 INFO L479 AbstractCegarLoop]: Abstraction has 45565 states and 71518 transitions. [2020-10-14 09:26:23,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 45565 states and 71518 transitions. [2020-10-14 09:26:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:26:23,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:23,680 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] [2020-10-14 09:26:23,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:26:23,680 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2119892646, now seen corresponding path program 1 times [2020-10-14 09:26:23,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:23,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079579093] [2020-10-14 09:26:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:27,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:28,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:28,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:26:28,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:28,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:26:28,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:28,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:26:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:28,875 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:28,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:28,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:28,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:28,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:28,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:28,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:28,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:28,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:28,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:28,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079579093] [2020-10-14 09:26:28,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:28,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:28,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472710181] [2020-10-14 09:26:28,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:28,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:28,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:28,903 INFO L87 Difference]: Start difference. First operand 45565 states and 71518 transitions. Second operand 4 states. [2020-10-14 09:26:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:36,349 INFO L93 Difference]: Finished difference Result 136279 states and 214039 transitions. [2020-10-14 09:26:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:36,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:26:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:36,458 INFO L225 Difference]: With dead ends: 136279 [2020-10-14 09:26:36,459 INFO L226 Difference]: Without dead ends: 91097 [2020-10-14 09:26:36,496 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 [2020-10-14 09:26:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91097 states. [2020-10-14 09:26:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91097 to 45568. [2020-10-14 09:26:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45568 states. [2020-10-14 09:26:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45568 states to 45568 states and 71522 transitions. [2020-10-14 09:26:39,699 INFO L78 Accepts]: Start accepts. Automaton has 45568 states and 71522 transitions. Word has length 77 [2020-10-14 09:26:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:39,700 INFO L479 AbstractCegarLoop]: Abstraction has 45568 states and 71522 transitions. [2020-10-14 09:26:39,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 45568 states and 71522 transitions. [2020-10-14 09:26:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:26:39,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:39,702 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] [2020-10-14 09:26:39,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:26:39,703 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1524245228, now seen corresponding path program 1 times [2020-10-14 09:26:39,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:39,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291482114] [2020-10-14 09:26:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:39,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:44,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:26:44,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:44,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:26:44,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:44,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:26:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:26:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:26:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:44,935 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:44,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:44,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:44,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:44,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:44,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291482114] [2020-10-14 09:26:44,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:44,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:26:44,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755665107] [2020-10-14 09:26:44,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:26:44,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:44,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:26:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:44,958 INFO L87 Difference]: Start difference. First operand 45568 states and 71522 transitions. Second operand 6 states. [2020-10-14 09:26:45,175 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 09:26:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:59,311 INFO L93 Difference]: Finished difference Result 251938 states and 401178 transitions. [2020-10-14 09:26:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:26:59,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-14 09:26:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:59,617 INFO L225 Difference]: With dead ends: 251938 [2020-10-14 09:26:59,617 INFO L226 Difference]: Without dead ends: 207528 [2020-10-14 09:26:59,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:26:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207528 states. [2020-10-14 09:27:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207528 to 88264. [2020-10-14 09:27:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88264 states. [2020-10-14 09:27:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88264 states to 88264 states and 137674 transitions. [2020-10-14 09:27:08,747 INFO L78 Accepts]: Start accepts. Automaton has 88264 states and 137674 transitions. Word has length 78 [2020-10-14 09:27:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:08,747 INFO L479 AbstractCegarLoop]: Abstraction has 88264 states and 137674 transitions. [2020-10-14 09:27:08,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:27:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 88264 states and 137674 transitions. [2020-10-14 09:27:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:27:08,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:08,749 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] [2020-10-14 09:27:08,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:27:08,749 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash -68572262, now seen corresponding path program 1 times [2020-10-14 09:27:08,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:08,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302929066] [2020-10-14 09:27:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:13,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:13,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:27:13,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:27:13,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:13,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:27:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:27:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:27:13,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:13,974 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:13,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:13,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:13,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:13,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:27:13,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:13,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:13,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302929066] [2020-10-14 09:27:13,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:13,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:27:13,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423719472] [2020-10-14 09:27:13,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:27:13,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:27:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:13,995 INFO L87 Difference]: Start difference. First operand 88264 states and 137674 transitions. Second operand 5 states. [2020-10-14 09:27:14,209 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:27:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:31,403 INFO L93 Difference]: Finished difference Result 302878 states and 477341 transitions. [2020-10-14 09:27:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:27:31,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:27:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:31,727 INFO L225 Difference]: With dead ends: 302878 [2020-10-14 09:27:31,728 INFO L226 Difference]: Without dead ends: 215772 [2020-10-14 09:27:31,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:27:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215772 states. [2020-10-14 09:27:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215772 to 151552. [2020-10-14 09:27:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151552 states. [2020-10-14 09:27:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151552 states to 151552 states and 236586 transitions. [2020-10-14 09:27:47,021 INFO L78 Accepts]: Start accepts. Automaton has 151552 states and 236586 transitions. Word has length 79 [2020-10-14 09:27:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:47,021 INFO L479 AbstractCegarLoop]: Abstraction has 151552 states and 236586 transitions. [2020-10-14 09:27:47,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:27:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 151552 states and 236586 transitions. [2020-10-14 09:27:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:27:47,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:47,023 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] [2020-10-14 09:27:47,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:27:47,024 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2112174747, now seen corresponding path program 1 times [2020-10-14 09:27:47,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:47,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129821197] [2020-10-14 09:27:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:52,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:52,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:27:52,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:27:52,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:52,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:27:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:27:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:27:52,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:52,238 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:52,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:52,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:52,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:52,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:52,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:52,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:52,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:52,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:52,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:52,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129821197] [2020-10-14 09:27:52,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:52,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:27:52,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678730852] [2020-10-14 09:27:52,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:27:52,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:27:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:52,259 INFO L87 Difference]: Start difference. First operand 151552 states and 236586 transitions. Second operand 5 states. [2020-10-14 09:27:52,459 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 170