/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/eca-rers2012/Problem13_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 03:11:58,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 03:11:58,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 03:11:58,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 03:11:58,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 03:11:58,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 03:11:58,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 03:11:58,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 03:11:58,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 03:11:58,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 03:11:58,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 03:11:58,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 03:11:58,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 03:11:58,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 03:11:58,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 03:11:58,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 03:11:58,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 03:11:58,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 03:11:58,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 03:11:58,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 03:11:58,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 03:11:58,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 03:11:58,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 03:11:58,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 03:11:58,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 03:11:58,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 03:11:58,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 03:11:58,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 03:11:58,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 03:11:58,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 03:11:58,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 03:11:58,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 03:11:58,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 03:11:58,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 03:11:58,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 03:11:58,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 03:11:58,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 03:11:58,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 03:11:58,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 03:11:58,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 03:11:58,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 03:11:58,745 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 03:11:58,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 03:11:58,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 03:11:58,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 03:11:58,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 03:11:58,801 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 03:11:58,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 03:11:58,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 03:11:58,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 03:11:58,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 03:11:58,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 03:11:58,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 03:11:58,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 03:11:58,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 03:11:58,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 03:11:58,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 03:11:58,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 03:11:58,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 03:11:58,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 03:11:58,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 03:11:58,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 03:11:58,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 03:11:58,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 03:11:58,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 03:11:58,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 03:11:58,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 03:11:58,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 03:11:58,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 03:11:58,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 03:11:58,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 03:11:58,810 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 03:11:59,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 03:11:59,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 03:11:59,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 03:11:59,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 03:11:59,204 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 03:11:59,205 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label54.c [2020-10-14 03:11:59,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/664975b44/f1997e618c3741cfb43ad04ada47f86a/FLAG27b5a8d5b [2020-10-14 03:12:00,214 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 03:12:00,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label54.c [2020-10-14 03:12:00,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/664975b44/f1997e618c3741cfb43ad04ada47f86a/FLAG27b5a8d5b [2020-10-14 03:12:00,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/664975b44/f1997e618c3741cfb43ad04ada47f86a [2020-10-14 03:12:00,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 03:12:00,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 03:12:00,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 03:12:00,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 03:12:00,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 03:12:00,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:12:00" (1/1) ... [2020-10-14 03:12:00,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d1f019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:00, skipping insertion in model container [2020-10-14 03:12:00,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:12:00" (1/1) ... [2020-10-14 03:12:00,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 03:12:00,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 03:12:02,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 03:12:02,995 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 03:12:03,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 03:12:03,888 INFO L208 MainTranslator]: Completed translation [2020-10-14 03:12:03,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03 WrapperNode [2020-10-14 03:12:03,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 03:12:03,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 03:12:03,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 03:12:03,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 03:12:03,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:03,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:03,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:03,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:04,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:04,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:04,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (1/1) ... [2020-10-14 03:12:04,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 03:12:04,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 03:12:04,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 03:12:04,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 03:12:04,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (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 03:12:04,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 03:12:04,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 03:12:04,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 03:12:04,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 03:12:04,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 03:12:04,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 03:12:04,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 03:12:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 03:12:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 03:12:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 03:12:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 03:12:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 03:12:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 03:12:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 03:12:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 03:12:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 03:12:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 03:12:17,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 03:12:17,134 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 03:12:17,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:12:17 BoogieIcfgContainer [2020-10-14 03:12:17,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 03:12:17,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 03:12:17,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 03:12:17,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 03:12:17,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:12:00" (1/3) ... [2020-10-14 03:12:17,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e822587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:12:17, skipping insertion in model container [2020-10-14 03:12:17,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:12:03" (2/3) ... [2020-10-14 03:12:17,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e822587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:12:17, skipping insertion in model container [2020-10-14 03:12:17,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:12:17" (3/3) ... [2020-10-14 03:12:17,180 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2020-10-14 03:12:17,199 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 03:12:17,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 03:12:17,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 03:12:17,306 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 03:12:17,306 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 03:12:17,306 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 03:12:17,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 03:12:17,307 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 03:12:17,307 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 03:12:17,309 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 03:12:17,309 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 03:12:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 03:12:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 03:12:17,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:12:17,404 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] [2020-10-14 03:12:17,405 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:12:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:12:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1861016480, now seen corresponding path program 1 times [2020-10-14 03:12:17,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:12:17,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309266596] [2020-10-14 03:12:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:12:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:18,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:18,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 03:12:18,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:18,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-14 03:12:18,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:18,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 03:12:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 03:12:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 03:12:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 03:12:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:12:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:18,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:18,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:12:18,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:18,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 03:12:18,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:18,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:12:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:12:18,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 03:12:18,538 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 03:12:18,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309266596] [2020-10-14 03:12:18,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 03:12:18,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 03:12:18,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228587765] [2020-10-14 03:12:18,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 03:12:18,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:12:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 03:12:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 03:12:18,579 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 03:12:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:12:35,636 INFO L93 Difference]: Finished difference Result 3152 states and 5831 transitions. [2020-10-14 03:12:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:12:35,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-14 03:12:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:12:35,674 INFO L225 Difference]: With dead ends: 3152 [2020-10-14 03:12:35,675 INFO L226 Difference]: Without dead ends: 1954 [2020-10-14 03:12:35,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:12:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-14 03:12:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1885. [2020-10-14 03:12:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-14 03:12:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3103 transitions. [2020-10-14 03:12:35,862 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3103 transitions. Word has length 33 [2020-10-14 03:12:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:12:35,863 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 3103 transitions. [2020-10-14 03:12:35,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 03:12:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3103 transitions. [2020-10-14 03:12:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 03:12:35,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:12:35,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:12:35,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 03:12:35,869 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:12:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:12:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1728074920, now seen corresponding path program 1 times [2020-10-14 03:12:35,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:12:35,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692876871] [2020-10-14 03:12:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:12:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:35,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:36,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:37,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 03:12:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:12:37,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-14 03:12:37,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:37,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:12:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 03:12:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 03:12:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:37,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:12:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:37,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:37,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:37,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:12:37,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:37,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 03:12:37,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:37,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:12:37,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:37,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:12:37,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:37,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:12:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:12:37,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:12:37,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:12:37,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 03:12:37,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:12:37,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-14 03:12:37,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:12:37,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:12:37,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:12:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:12:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 03:12:37,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:12:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:12:37,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692876871] [2020-10-14 03:12:37,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:12:37,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 03:12:37,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550382288] [2020-10-14 03:12:37,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 03:12:37,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:12:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 03:12:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:12:37,450 INFO L87 Difference]: Start difference. First operand 1885 states and 3103 transitions. Second operand 6 states. [2020-10-14 03:13:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:13:02,421 INFO L93 Difference]: Finished difference Result 7208 states and 11997 transitions. [2020-10-14 03:13:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 03:13:02,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-14 03:13:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:13:02,455 INFO L225 Difference]: With dead ends: 7208 [2020-10-14 03:13:02,455 INFO L226 Difference]: Without dead ends: 5329 [2020-10-14 03:13:02,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 03:13:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2020-10-14 03:13:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 3572. [2020-10-14 03:13:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3572 states. [2020-10-14 03:13:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 5390 transitions. [2020-10-14 03:13:02,675 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 5390 transitions. Word has length 103 [2020-10-14 03:13:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:13:02,676 INFO L479 AbstractCegarLoop]: Abstraction has 3572 states and 5390 transitions. [2020-10-14 03:13:02,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 03:13:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 5390 transitions. [2020-10-14 03:13:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 03:13:02,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:13:02,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:13:02,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 03:13:02,684 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:13:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:13:02,686 INFO L82 PathProgramCache]: Analyzing trace with hash -881411451, now seen corresponding path program 1 times [2020-10-14 03:13:02,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:13:02,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436894651] [2020-10-14 03:13:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:13:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:02,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:03,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:03,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 03:13:03,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:13:03,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-10-14 03:13:03,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:03,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:03,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:13:03,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 03:13:03,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 03:13:03,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:03,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:13:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:03,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:03,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:13:03,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:03,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 03:13:03,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:03,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:13:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:13:03,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:03,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:13:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:03,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 03:13:03,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-14 03:13:03,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:03,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 03:13:03,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:13:04,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436894651] [2020-10-14 03:13:04,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:13:04,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:13:04,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883706744] [2020-10-14 03:13:04,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:13:04,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:13:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:13:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:13:04,009 INFO L87 Difference]: Start difference. First operand 3572 states and 5390 transitions. Second operand 5 states. [2020-10-14 03:13:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:13:21,779 INFO L93 Difference]: Finished difference Result 7256 states and 11588 transitions. [2020-10-14 03:13:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:13:21,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-14 03:13:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:13:21,812 INFO L225 Difference]: With dead ends: 7256 [2020-10-14 03:13:21,812 INFO L226 Difference]: Without dead ends: 5328 [2020-10-14 03:13:21,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:13:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2020-10-14 03:13:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 5247. [2020-10-14 03:13:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5247 states. [2020-10-14 03:13:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5247 states to 5247 states and 8192 transitions. [2020-10-14 03:13:21,982 INFO L78 Accepts]: Start accepts. Automaton has 5247 states and 8192 transitions. Word has length 108 [2020-10-14 03:13:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:13:21,987 INFO L479 AbstractCegarLoop]: Abstraction has 5247 states and 8192 transitions. [2020-10-14 03:13:21,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:13:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 5247 states and 8192 transitions. [2020-10-14 03:13:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-14 03:13:21,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:13:21,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:13:21,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 03:13:21,992 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:13:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:13:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash 847967576, now seen corresponding path program 1 times [2020-10-14 03:13:21,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:13:21,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89833223] [2020-10-14 03:13:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:13:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:22,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:23,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:23,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 03:13:23,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:13:23,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-14 03:13:23,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:23,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:13:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-14 03:13:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 03:13:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:23,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:13:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:23,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:23,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:23,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:13:23,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:23,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:13:23,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:23,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:13:23,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:23,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:13:23,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:23,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:13:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:23,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:23,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:23,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 03:13:23,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:23,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-14 03:13:23,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:23,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 03:13:23,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:13:23,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89833223] [2020-10-14 03:13:23,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:13:23,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:13:23,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395009858] [2020-10-14 03:13:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:13:23,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:13:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:13:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:13:23,665 INFO L87 Difference]: Start difference. First operand 5247 states and 8192 transitions. Second operand 5 states. [2020-10-14 03:13:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:13:43,857 INFO L93 Difference]: Finished difference Result 15375 states and 24474 transitions. [2020-10-14 03:13:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:13:43,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-14 03:13:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:13:43,908 INFO L225 Difference]: With dead ends: 15375 [2020-10-14 03:13:43,909 INFO L226 Difference]: Without dead ends: 10134 [2020-10-14 03:13:43,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:13:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10134 states. [2020-10-14 03:13:44,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10134 to 10128. [2020-10-14 03:13:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10128 states. [2020-10-14 03:13:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10128 states to 10128 states and 14834 transitions. [2020-10-14 03:13:44,208 INFO L78 Accepts]: Start accepts. Automaton has 10128 states and 14834 transitions. Word has length 145 [2020-10-14 03:13:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:13:44,211 INFO L479 AbstractCegarLoop]: Abstraction has 10128 states and 14834 transitions. [2020-10-14 03:13:44,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:13:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 10128 states and 14834 transitions. [2020-10-14 03:13:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 03:13:44,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:13:44,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:13:44,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 03:13:44,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:13:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:13:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1950914326, now seen corresponding path program 1 times [2020-10-14 03:13:44,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:13:44,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313217511] [2020-10-14 03:13:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:13:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:44,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:44,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:45,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:45,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 03:13:45,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:13:45,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-14 03:13:45,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:45,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:45,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:13:45,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 144 [2020-10-14 03:13:45,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 03:13:45,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:13:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:45,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:45,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:45,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:13:45,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:45,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:13:45,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:45,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:13:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:13:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:45,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:13:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:13:45,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:13:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:13:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 03:13:45,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:13:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-14 03:13:45,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:13:45,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:13:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:13:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:13:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 03:13:45,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:13:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:13:45,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313217511] [2020-10-14 03:13:45,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:13:45,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:13:45,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857372773] [2020-10-14 03:13:45,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:13:45,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:13:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:13:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:13:45,521 INFO L87 Difference]: Start difference. First operand 10128 states and 14834 transitions. Second operand 5 states. [2020-10-14 03:14:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:14:11,869 INFO L93 Difference]: Finished difference Result 29173 states and 43705 transitions. [2020-10-14 03:14:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:14:11,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-14 03:14:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:14:11,961 INFO L225 Difference]: With dead ends: 29173 [2020-10-14 03:14:11,962 INFO L226 Difference]: Without dead ends: 19051 [2020-10-14 03:14:11,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:14:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19051 states. [2020-10-14 03:14:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19051 to 19047. [2020-10-14 03:14:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19047 states. [2020-10-14 03:14:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19047 states to 19047 states and 25447 transitions. [2020-10-14 03:14:12,443 INFO L78 Accepts]: Start accepts. Automaton has 19047 states and 25447 transitions. Word has length 169 [2020-10-14 03:14:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:14:12,444 INFO L479 AbstractCegarLoop]: Abstraction has 19047 states and 25447 transitions. [2020-10-14 03:14:12,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:14:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 19047 states and 25447 transitions. [2020-10-14 03:14:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 03:14:12,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:14:12,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:14:12,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 03:14:12,449 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:14:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:14:12,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2069293356, now seen corresponding path program 1 times [2020-10-14 03:14:12,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:14:12,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663054147] [2020-10-14 03:14:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:14:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:13,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:14,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:14:14,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 03:14:14,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 03:14:14,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1829 [2020-10-14 03:14:14,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:14:14,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:14:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:14:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 03:14:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-14 03:14:14,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:14:14,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:14:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:14,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:14,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:14:14,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:14:14,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:14:14,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 03:14:14,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:14:14,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:14:14,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:14:14,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:14:14,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:14:14,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:14:14,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:14:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:14,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:14,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:14:14,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 03:14:14,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:14:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-14 03:14:14,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:14:14,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:14:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:14:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-14 03:14:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 03:14:14,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:14:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:14:14,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663054147] [2020-10-14 03:14:14,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 03:14:14,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 03:14:14,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342400537] [2020-10-14 03:14:14,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 03:14:14,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:14:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 03:14:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:14:14,815 INFO L87 Difference]: Start difference. First operand 19047 states and 25447 transitions. Second operand 6 states. [2020-10-14 03:14:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:14:30,469 INFO L93 Difference]: Finished difference Result 32403 states and 44072 transitions. [2020-10-14 03:14:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:14:30,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-10-14 03:14:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:14:30,555 INFO L225 Difference]: With dead ends: 32403 [2020-10-14 03:14:30,556 INFO L226 Difference]: Without dead ends: 19038 [2020-10-14 03:14:30,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 03:14:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19038 states. [2020-10-14 03:14:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19038 to 19034. [2020-10-14 03:14:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19034 states. [2020-10-14 03:14:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19034 states to 19034 states and 25420 transitions. [2020-10-14 03:14:31,018 INFO L78 Accepts]: Start accepts. Automaton has 19034 states and 25420 transitions. Word has length 169 [2020-10-14 03:14:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:14:31,018 INFO L479 AbstractCegarLoop]: Abstraction has 19034 states and 25420 transitions. [2020-10-14 03:14:31,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 03:14:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 19034 states and 25420 transitions. [2020-10-14 03:14:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-14 03:14:31,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:14:31,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:14:31,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 03:14:31,024 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:14:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:14:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash -225090383, now seen corresponding path program 1 times [2020-10-14 03:14:31,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:14:31,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205538882] [2020-10-14 03:14:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:14:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:31,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:32,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:14:32,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-14 03:14:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 03:14:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1424 [2020-10-14 03:14:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:14:32,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:14:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:14:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-14 03:14:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 03:14:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:14:32,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:14:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:32,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:14:32,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:14:32,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:14:32,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 03:14:32,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:14:32,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:14:32,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:14:32,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:14:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:14:32,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:14:32,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:14:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:32,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:14:32,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-14 03:14:32,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:14:32,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-14 03:14:32,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:14:32,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:14:32,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:14:32,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:14:32,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 03:14:32,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:14:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 03:14:32,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205538882] [2020-10-14 03:14:32,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:14:32,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 03:14:32,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708456303] [2020-10-14 03:14:32,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:14:32,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:14:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:14:32,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:14:32,990 INFO L87 Difference]: Start difference. First operand 19034 states and 25420 transitions. Second operand 5 states. [2020-10-14 03:14:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:14:57,872 INFO L93 Difference]: Finished difference Result 51874 states and 71283 transitions. [2020-10-14 03:14:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:14:57,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-14 03:14:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:14:58,009 INFO L225 Difference]: With dead ends: 51874 [2020-10-14 03:14:58,010 INFO L226 Difference]: Without dead ends: 32846 [2020-10-14 03:14:58,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:14:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32846 states. [2020-10-14 03:14:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32846 to 32024. [2020-10-14 03:14:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32024 states. [2020-10-14 03:14:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32024 states to 32024 states and 40757 transitions. [2020-10-14 03:14:59,801 INFO L78 Accepts]: Start accepts. Automaton has 32024 states and 40757 transitions. Word has length 179 [2020-10-14 03:14:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:14:59,802 INFO L479 AbstractCegarLoop]: Abstraction has 32024 states and 40757 transitions. [2020-10-14 03:14:59,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:14:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32024 states and 40757 transitions. [2020-10-14 03:14:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-14 03:14:59,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:14:59,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 03:14:59,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 03:14:59,807 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:14:59,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:14:59,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1858752848, now seen corresponding path program 1 times [2020-10-14 03:14:59,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:14:59,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848955806] [2020-10-14 03:14:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:14:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:14:59,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:14:59,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:00,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:01,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:02,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:04,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:04,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-14 03:15:04,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 03:15:04,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4996 [2020-10-14 03:15:04,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:04,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:04,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:15:04,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-14 03:15:04,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:15:04,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:15:04,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:15:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:04,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:04,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:04,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:15:04,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:15:04,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:15:04,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:04,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:15:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:15:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:15:04,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:15:04,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:15:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:04,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:04,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 03:15:04,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:15:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 03:15:04,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:04,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:15:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:15:04,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:15:04,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 03:15:05,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 03:15:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:05,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:05,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:05,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 03:15:05,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:15:05,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-14 03:15:05,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:05,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:15:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 03:15:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 03:15:05,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:15:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-14 03:15:05,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848955806] [2020-10-14 03:15:05,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 03:15:05,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 03:15:05,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466361118] [2020-10-14 03:15:05,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 03:15:05,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:15:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 03:15:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 03:15:05,275 INFO L87 Difference]: Start difference. First operand 32024 states and 40757 transitions. Second operand 5 states. [2020-10-14 03:15:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 03:15:38,191 INFO L93 Difference]: Finished difference Result 73040 states and 96234 transitions. [2020-10-14 03:15:38,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 03:15:38,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2020-10-14 03:15:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 03:15:38,401 INFO L225 Difference]: With dead ends: 73040 [2020-10-14 03:15:38,401 INFO L226 Difference]: Without dead ends: 48309 [2020-10-14 03:15:38,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 03:15:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48309 states. [2020-10-14 03:15:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48309 to 48249. [2020-10-14 03:15:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48249 states. [2020-10-14 03:15:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48249 states to 48249 states and 61975 transitions. [2020-10-14 03:15:39,508 INFO L78 Accepts]: Start accepts. Automaton has 48249 states and 61975 transitions. Word has length 208 [2020-10-14 03:15:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 03:15:39,509 INFO L479 AbstractCegarLoop]: Abstraction has 48249 states and 61975 transitions. [2020-10-14 03:15:39,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 03:15:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 48249 states and 61975 transitions. [2020-10-14 03:15:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-14 03:15:39,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 03:15:39,515 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 03:15:39,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 03:15:39,515 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 03:15:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 03:15:39,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2133512462, now seen corresponding path program 1 times [2020-10-14 03:15:39,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 03:15:39,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074670499] [2020-10-14 03:15:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 03:15:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:39,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:41,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:41,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-14 03:15:41,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 03:15:41,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2272 [2020-10-14 03:15:41,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:41,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:15:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-14 03:15:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 03:15:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:15:41,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 03:15:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:41,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:41,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 03:15:41,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:15:41,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 03:15:41,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:41,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 03:15:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:15:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 03:15:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:15:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 03:15:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:42,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:42,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:42,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 03:15:42,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:15:42,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-14 03:15:42,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:42,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 03:15:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 03:15:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 03:15:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:15:42,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 03:15:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 03:15:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 03:15:42,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 03:15:42,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 03:15:42,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 03:15:42,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 03:15:42,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 03:15:42,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 03:15:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 03:15:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 03:15:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 03:15:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 03:15:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 03:15:42,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074670499] [2020-10-14 03:15:42,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 03:15:42,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 03:15:42,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594135235] [2020-10-14 03:15:42,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 03:15:42,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 03:15:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 03:15:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 03:15:42,529 INFO L87 Difference]: Start difference. First operand 48249 states and 61975 transitions. Second operand 7 states.