/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:42:11,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:42:11,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:42:11,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:42:11,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:42:11,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:42:11,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:42:11,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:42:11,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:42:11,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:42:11,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:42:11,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:42:11,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:42:11,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:42:11,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:42:11,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:42:11,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:42:11,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:42:11,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:42:11,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:42:11,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:42:11,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:42:11,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:42:11,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:42:11,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:42:11,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:42:11,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:42:11,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:42:11,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:42:11,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:42:11,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:42:11,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:42:11,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:42:11,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:42:11,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:42:11,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:42:11,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:42:11,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:42:11,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:42:11,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:42:11,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:42:11,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:42:11,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:42:11,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:42:11,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:42:11,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:42:11,758 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:42:11,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:42:11,758 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:42:11,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:42:11,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:42:11,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:42:11,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:42:11,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:42:11,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:42:11,759 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:42:11,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:42:11,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:42:11,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:42:11,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:42:11,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:42:11,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:42:11,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:42:11,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:42:11,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:42:11,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:42:11,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:42:11,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:42:11,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:42:11,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:42:11,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:42:11,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:42:12,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:42:12,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:42:12,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:42:12,063 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:42:12,064 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:42:12,064 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-13 10:42:12,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50bbe8002/a6fb3ba206b14bcf87f72ff03bb491c7/FLAG780f3fb2c [2020-10-13 10:42:12,576 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:42:12,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-13 10:42:12,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50bbe8002/a6fb3ba206b14bcf87f72ff03bb491c7/FLAG780f3fb2c [2020-10-13 10:42:12,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50bbe8002/a6fb3ba206b14bcf87f72ff03bb491c7 [2020-10-13 10:42:12,945 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:42:12,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:42:12,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:12,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:42:12,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:42:12,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:12" (1/1) ... [2020-10-13 10:42:12,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbd1661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:12, skipping insertion in model container [2020-10-13 10:42:12,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:12" (1/1) ... [2020-10-13 10:42:12,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:42:12,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:42:13,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:13,177 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:42:13,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:13,223 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:42:13,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13 WrapperNode [2020-10-13 10:42:13,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:13,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:42:13,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:42:13,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:42:13,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... [2020-10-13 10:42:13,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:42:13,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:42:13,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:42:13,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:42:13,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:42:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:42:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:42:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:42:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:42:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:42:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:42:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:42:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:42:13,794 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:42:13,794 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:42:13,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:13 BoogieIcfgContainer [2020-10-13 10:42:13,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:42:13,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:42:13,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:42:13,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:42:13,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:42:12" (1/3) ... [2020-10-13 10:42:13,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20547ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:13, skipping insertion in model container [2020-10-13 10:42:13,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:13" (2/3) ... [2020-10-13 10:42:13,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20547ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:13, skipping insertion in model container [2020-10-13 10:42:13,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:13" (3/3) ... [2020-10-13 10:42:13,806 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2020-10-13 10:42:13,817 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:42:13,824 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:42:13,841 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:42:13,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:42:13,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:42:13,866 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:42:13,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:42:13,866 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:42:13,866 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:42:13,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:42:13,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:42:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-13 10:42:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:42:13,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:13,893 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] [2020-10-13 10:42:13,893 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:13,899 INFO L82 PathProgramCache]: Analyzing trace with hash -563360106, now seen corresponding path program 1 times [2020-10-13 10:42:13,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:13,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334245558] [2020-10-13 10:42:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:14,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:14,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:42:14,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:14,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-13 10:42:14,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:42:14,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:14,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:42:14,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:14,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:14,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:14,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:14,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:14,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:14,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:14,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:14,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334245558] [2020-10-13 10:42:14,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:14,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:14,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031786397] [2020-10-13 10:42:14,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:14,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:14,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:14,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:14,514 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-10-13 10:42:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:14,572 INFO L93 Difference]: Finished difference Result 117 states and 210 transitions. [2020-10-13 10:42:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:14,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 10:42:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:14,588 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:42:14,588 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:42:14,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:42:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-13 10:42:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:42:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-10-13 10:42:14,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 25 [2020-10-13 10:42:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:14,636 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-10-13 10:42:14,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-10-13 10:42:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:42:14,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:14,638 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] [2020-10-13 10:42:14,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:42:14,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1737462484, now seen corresponding path program 1 times [2020-10-13 10:42:14,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:14,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282482221] [2020-10-13 10:42:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:14,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:14,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:42:14,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:14,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-13 10:42:14,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:14,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:14,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:42:14,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:14,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:14,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:14,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:14,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:14,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:14,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:14,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:14,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:14,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282482221] [2020-10-13 10:42:14,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:14,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:14,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028011185] [2020-10-13 10:42:14,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:14,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:14,770 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 3 states. [2020-10-13 10:42:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:14,827 INFO L93 Difference]: Finished difference Result 167 states and 312 transitions. [2020-10-13 10:42:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:14,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 10:42:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:14,832 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:42:14,833 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:42:14,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:42:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-13 10:42:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:42:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 185 transitions. [2020-10-13 10:42:14,850 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 185 transitions. Word has length 25 [2020-10-13 10:42:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:14,850 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 185 transitions. [2020-10-13 10:42:14,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 185 transitions. [2020-10-13 10:42:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:42:14,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:14,852 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] [2020-10-13 10:42:14,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:42:14,852 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash -284082342, now seen corresponding path program 1 times [2020-10-13 10:42:14,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:14,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116330684] [2020-10-13 10:42:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:14,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:15,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:15,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-13 10:42:15,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:42:15,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:15,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:15,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116330684] [2020-10-13 10:42:15,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466886484] [2020-10-13 10:42:15,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,100 INFO L87 Difference]: Start difference. First operand 100 states and 185 transitions. Second operand 3 states. [2020-10-13 10:42:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,121 INFO L93 Difference]: Finished difference Result 153 states and 279 transitions. [2020-10-13 10:42:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-13 10:42:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,123 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:42:15,124 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 10:42:15,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 10:42:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-13 10:42:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:42:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 187 transitions. [2020-10-13 10:42:15,136 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 187 transitions. Word has length 26 [2020-10-13 10:42:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,136 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 187 transitions. [2020-10-13 10:42:15,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 187 transitions. [2020-10-13 10:42:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:42:15,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,138 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] [2020-10-13 10:42:15,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:42:15,138 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1973026084, now seen corresponding path program 1 times [2020-10-13 10:42:15,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623240658] [2020-10-13 10:42:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:15,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 10:42:15,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:42:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:15,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:15,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623240658] [2020-10-13 10:42:15,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732839611] [2020-10-13 10:42:15,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,221 INFO L87 Difference]: Start difference. First operand 103 states and 187 transitions. Second operand 3 states. [2020-10-13 10:42:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,240 INFO L93 Difference]: Finished difference Result 196 states and 360 transitions. [2020-10-13 10:42:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-13 10:42:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,243 INFO L225 Difference]: With dead ends: 196 [2020-10-13 10:42:15,243 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 10:42:15,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 10:42:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 136. [2020-10-13 10:42:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:42:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 248 transitions. [2020-10-13 10:42:15,259 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 248 transitions. Word has length 26 [2020-10-13 10:42:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,259 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 248 transitions. [2020-10-13 10:42:15,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 248 transitions. [2020-10-13 10:42:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:42:15,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,261 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] [2020-10-13 10:42:15,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:42:15,262 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,262 INFO L82 PathProgramCache]: Analyzing trace with hash 327796506, now seen corresponding path program 1 times [2020-10-13 10:42:15,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913746026] [2020-10-13 10:42:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:15,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 10:42:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:42:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:15,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913746026] [2020-10-13 10:42:15,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180307860] [2020-10-13 10:42:15,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,341 INFO L87 Difference]: Start difference. First operand 136 states and 248 transitions. Second operand 3 states. [2020-10-13 10:42:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,362 INFO L93 Difference]: Finished difference Result 324 states and 598 transitions. [2020-10-13 10:42:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-13 10:42:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,364 INFO L225 Difference]: With dead ends: 324 [2020-10-13 10:42:15,364 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 10:42:15,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 10:42:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-10-13 10:42:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 10:42:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 354 transitions. [2020-10-13 10:42:15,379 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 354 transitions. Word has length 26 [2020-10-13 10:42:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,379 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 354 transitions. [2020-10-13 10:42:15,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 354 transitions. [2020-10-13 10:42:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:42:15,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,381 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] [2020-10-13 10:42:15,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:42:15,381 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1034054359, now seen corresponding path program 1 times [2020-10-13 10:42:15,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729031261] [2020-10-13 10:42:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:42:15,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 10:42:15,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:42:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:15,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:15,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729031261] [2020-10-13 10:42:15,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742623560] [2020-10-13 10:42:15,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,487 INFO L87 Difference]: Start difference. First operand 194 states and 354 transitions. Second operand 3 states. [2020-10-13 10:42:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,503 INFO L93 Difference]: Finished difference Result 291 states and 529 transitions. [2020-10-13 10:42:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-13 10:42:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,506 INFO L225 Difference]: With dead ends: 291 [2020-10-13 10:42:15,506 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 10:42:15,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 10:42:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-10-13 10:42:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 10:42:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 354 transitions. [2020-10-13 10:42:15,518 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 354 transitions. Word has length 27 [2020-10-13 10:42:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,519 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 354 transitions. [2020-10-13 10:42:15,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 354 transitions. [2020-10-13 10:42:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:42:15,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:15,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:42:15,521 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1571969195, now seen corresponding path program 1 times [2020-10-13 10:42:15,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492926111] [2020-10-13 10:42:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:42:15,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 10:42:15,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:42:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:15,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492926111] [2020-10-13 10:42:15,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005958201] [2020-10-13 10:42:15,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,600 INFO L87 Difference]: Start difference. First operand 196 states and 354 transitions. Second operand 3 states. [2020-10-13 10:42:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,633 INFO L93 Difference]: Finished difference Result 372 states and 680 transitions. [2020-10-13 10:42:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-13 10:42:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,636 INFO L225 Difference]: With dead ends: 372 [2020-10-13 10:42:15,636 INFO L226 Difference]: Without dead ends: 370 [2020-10-13 10:42:15,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-13 10:42:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 264. [2020-10-13 10:42:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-13 10:42:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 474 transitions. [2020-10-13 10:42:15,648 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 474 transitions. Word has length 27 [2020-10-13 10:42:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,649 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 474 transitions. [2020-10-13 10:42:15,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 474 transitions. [2020-10-13 10:42:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:42:15,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,651 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] [2020-10-13 10:42:15,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:42:15,651 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -422175511, now seen corresponding path program 1 times [2020-10-13 10:42:15,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029441478] [2020-10-13 10:42:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:42:15,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 10:42:15,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:42:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:15,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029441478] [2020-10-13 10:42:15,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842138621] [2020-10-13 10:42:15,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,731 INFO L87 Difference]: Start difference. First operand 264 states and 474 transitions. Second operand 3 states. [2020-10-13 10:42:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,754 INFO L93 Difference]: Finished difference Result 632 states and 1144 transitions. [2020-10-13 10:42:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-13 10:42:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,758 INFO L225 Difference]: With dead ends: 632 [2020-10-13 10:42:15,758 INFO L226 Difference]: Without dead ends: 378 [2020-10-13 10:42:15,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-13 10:42:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2020-10-13 10:42:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 10:42:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 674 transitions. [2020-10-13 10:42:15,774 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 674 transitions. Word has length 27 [2020-10-13 10:42:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,774 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 674 transitions. [2020-10-13 10:42:15,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 674 transitions. [2020-10-13 10:42:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:42:15,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,776 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] [2020-10-13 10:42:15,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:42:15,777 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1486617231, now seen corresponding path program 1 times [2020-10-13 10:42:15,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307627369] [2020-10-13 10:42:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:42:15,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:15,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 10:42:15,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:42:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:15,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:15,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:15,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:15,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:15,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307627369] [2020-10-13 10:42:15,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:15,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:15,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221043509] [2020-10-13 10:42:15,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:15,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:15,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,897 INFO L87 Difference]: Start difference. First operand 376 states and 674 transitions. Second operand 3 states. [2020-10-13 10:42:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:15,916 INFO L93 Difference]: Finished difference Result 564 states and 1008 transitions. [2020-10-13 10:42:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:15,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 10:42:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:15,920 INFO L225 Difference]: With dead ends: 564 [2020-10-13 10:42:15,920 INFO L226 Difference]: Without dead ends: 382 [2020-10-13 10:42:15,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-13 10:42:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2020-10-13 10:42:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-13 10:42:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 674 transitions. [2020-10-13 10:42:15,936 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 674 transitions. Word has length 28 [2020-10-13 10:42:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:15,937 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 674 transitions. [2020-10-13 10:42:15,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 674 transitions. [2020-10-13 10:42:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:42:15,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:15,939 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] [2020-10-13 10:42:15,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:42:15,939 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash -202326511, now seen corresponding path program 1 times [2020-10-13 10:42:15,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:15,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237928329] [2020-10-13 10:42:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:15,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:15,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:15,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:42:15,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:15,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 10:42:15,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:42:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:15,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:16,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237928329] [2020-10-13 10:42:16,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391665003] [2020-10-13 10:42:16,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,017 INFO L87 Difference]: Start difference. First operand 380 states and 674 transitions. Second operand 3 states. [2020-10-13 10:42:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,042 INFO L93 Difference]: Finished difference Result 716 states and 1288 transitions. [2020-10-13 10:42:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 10:42:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,047 INFO L225 Difference]: With dead ends: 716 [2020-10-13 10:42:16,047 INFO L226 Difference]: Without dead ends: 714 [2020-10-13 10:42:16,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-10-13 10:42:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 520. [2020-10-13 10:42:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-10-13 10:42:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 910 transitions. [2020-10-13 10:42:16,070 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 910 transitions. Word has length 28 [2020-10-13 10:42:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,070 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 910 transitions. [2020-10-13 10:42:16,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 910 transitions. [2020-10-13 10:42:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:42:16,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,072 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] [2020-10-13 10:42:16,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:42:16,073 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2098496079, now seen corresponding path program 1 times [2020-10-13 10:42:16,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863701687] [2020-10-13 10:42:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:42:16,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 10:42:16,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:42:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:16,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:16,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863701687] [2020-10-13 10:42:16,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13572708] [2020-10-13 10:42:16,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,155 INFO L87 Difference]: Start difference. First operand 520 states and 910 transitions. Second operand 3 states. [2020-10-13 10:42:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,179 INFO L93 Difference]: Finished difference Result 1244 states and 2192 transitions. [2020-10-13 10:42:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 10:42:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,184 INFO L225 Difference]: With dead ends: 1244 [2020-10-13 10:42:16,184 INFO L226 Difference]: Without dead ends: 738 [2020-10-13 10:42:16,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-13 10:42:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 736. [2020-10-13 10:42:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-13 10:42:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1286 transitions. [2020-10-13 10:42:16,206 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1286 transitions. Word has length 28 [2020-10-13 10:42:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,206 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 1286 transitions. [2020-10-13 10:42:16,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1286 transitions. [2020-10-13 10:42:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:42:16,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,208 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] [2020-10-13 10:42:16,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:42:16,208 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1976941762, now seen corresponding path program 1 times [2020-10-13 10:42:16,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316927595] [2020-10-13 10:42:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:42:16,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:16,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 10:42:16,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:42:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:16,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:16,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316927595] [2020-10-13 10:42:16,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771348322] [2020-10-13 10:42:16,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,331 INFO L87 Difference]: Start difference. First operand 736 states and 1286 transitions. Second operand 3 states. [2020-10-13 10:42:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,354 INFO L93 Difference]: Finished difference Result 1104 states and 1924 transitions. [2020-10-13 10:42:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 10:42:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,358 INFO L225 Difference]: With dead ends: 1104 [2020-10-13 10:42:16,359 INFO L226 Difference]: Without dead ends: 746 [2020-10-13 10:42:16,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-10-13 10:42:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 744. [2020-10-13 10:42:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-13 10:42:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1286 transitions. [2020-10-13 10:42:16,378 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1286 transitions. Word has length 29 [2020-10-13 10:42:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,379 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 1286 transitions. [2020-10-13 10:42:16,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1286 transitions. [2020-10-13 10:42:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:42:16,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,380 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] [2020-10-13 10:42:16,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:42:16,381 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash 629081792, now seen corresponding path program 1 times [2020-10-13 10:42:16,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219833892] [2020-10-13 10:42:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:42:16,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 10:42:16,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:42:16,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:16,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:16,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219833892] [2020-10-13 10:42:16,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900570700] [2020-10-13 10:42:16,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,444 INFO L87 Difference]: Start difference. First operand 744 states and 1286 transitions. Second operand 3 states. [2020-10-13 10:42:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,467 INFO L93 Difference]: Finished difference Result 1388 states and 2440 transitions. [2020-10-13 10:42:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 10:42:16,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,475 INFO L225 Difference]: With dead ends: 1388 [2020-10-13 10:42:16,475 INFO L226 Difference]: Without dead ends: 1386 [2020-10-13 10:42:16,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2020-10-13 10:42:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1032. [2020-10-13 10:42:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-10-13 10:42:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1750 transitions. [2020-10-13 10:42:16,501 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1750 transitions. Word has length 29 [2020-10-13 10:42:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,501 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1750 transitions. [2020-10-13 10:42:16,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1750 transitions. [2020-10-13 10:42:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:42:16,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,503 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] [2020-10-13 10:42:16,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:42:16,504 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1365062914, now seen corresponding path program 1 times [2020-10-13 10:42:16,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421713250] [2020-10-13 10:42:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:42:16,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 10:42:16,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:42:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:16,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:16,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421713250] [2020-10-13 10:42:16,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931606087] [2020-10-13 10:42:16,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,565 INFO L87 Difference]: Start difference. First operand 1032 states and 1750 transitions. Second operand 3 states. [2020-10-13 10:42:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,596 INFO L93 Difference]: Finished difference Result 2460 states and 4200 transitions. [2020-10-13 10:42:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 10:42:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,603 INFO L225 Difference]: With dead ends: 2460 [2020-10-13 10:42:16,603 INFO L226 Difference]: Without dead ends: 1450 [2020-10-13 10:42:16,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2020-10-13 10:42:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1448. [2020-10-13 10:42:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-10-13 10:42:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2454 transitions. [2020-10-13 10:42:16,640 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2454 transitions. Word has length 29 [2020-10-13 10:42:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,641 INFO L479 AbstractCegarLoop]: Abstraction has 1448 states and 2454 transitions. [2020-10-13 10:42:16,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2454 transitions. [2020-10-13 10:42:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:42:16,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,643 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] [2020-10-13 10:42:16,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:42:16,643 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1973087804, now seen corresponding path program 1 times [2020-10-13 10:42:16,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293346325] [2020-10-13 10:42:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:42:16,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:16,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 10:42:16,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:42:16,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:16,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:16,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293346325] [2020-10-13 10:42:16,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387851447] [2020-10-13 10:42:16,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,745 INFO L87 Difference]: Start difference. First operand 1448 states and 2454 transitions. Second operand 3 states. [2020-10-13 10:42:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,771 INFO L93 Difference]: Finished difference Result 2172 states and 3672 transitions. [2020-10-13 10:42:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-13 10:42:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,779 INFO L225 Difference]: With dead ends: 2172 [2020-10-13 10:42:16,779 INFO L226 Difference]: Without dead ends: 1466 [2020-10-13 10:42:16,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2020-10-13 10:42:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1464. [2020-10-13 10:42:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2020-10-13 10:42:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2454 transitions. [2020-10-13 10:42:16,816 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2454 transitions. Word has length 30 [2020-10-13 10:42:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,816 INFO L479 AbstractCegarLoop]: Abstraction has 1464 states and 2454 transitions. [2020-10-13 10:42:16,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2454 transitions. [2020-10-13 10:42:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:42:16,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,818 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] [2020-10-13 10:42:16,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:42:16,818 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 632935750, now seen corresponding path program 1 times [2020-10-13 10:42:16,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336206544] [2020-10-13 10:42:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:42:16,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:42:16,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:42:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:16,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:16,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:16,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:16,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:16,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:16,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:16,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336206544] [2020-10-13 10:42:16,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:16,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:16,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708202475] [2020-10-13 10:42:16,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:16,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:16,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,873 INFO L87 Difference]: Start difference. First operand 1464 states and 2454 transitions. Second operand 3 states. [2020-10-13 10:42:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:16,913 INFO L93 Difference]: Finished difference Result 2700 states and 4616 transitions. [2020-10-13 10:42:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:16,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-13 10:42:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:16,926 INFO L225 Difference]: With dead ends: 2700 [2020-10-13 10:42:16,927 INFO L226 Difference]: Without dead ends: 2698 [2020-10-13 10:42:16,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2020-10-13 10:42:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2056. [2020-10-13 10:42:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-10-13 10:42:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 3366 transitions. [2020-10-13 10:42:16,981 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 3366 transitions. Word has length 30 [2020-10-13 10:42:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:16,981 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 3366 transitions. [2020-10-13 10:42:16,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 3366 transitions. [2020-10-13 10:42:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:42:16,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:16,985 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] [2020-10-13 10:42:16,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:42:16,985 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1361208956, now seen corresponding path program 1 times [2020-10-13 10:42:16,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:16,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683069805] [2020-10-13 10:42:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:42:17,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:42:17,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:42:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:17,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:17,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:17,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:17,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683069805] [2020-10-13 10:42:17,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:17,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:17,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770468230] [2020-10-13 10:42:17,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:17,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,043 INFO L87 Difference]: Start difference. First operand 2056 states and 3366 transitions. Second operand 3 states. [2020-10-13 10:42:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:17,104 INFO L93 Difference]: Finished difference Result 4876 states and 8040 transitions. [2020-10-13 10:42:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:17,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-13 10:42:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:17,121 INFO L225 Difference]: With dead ends: 4876 [2020-10-13 10:42:17,122 INFO L226 Difference]: Without dead ends: 2858 [2020-10-13 10:42:17,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2020-10-13 10:42:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2856. [2020-10-13 10:42:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2856 states. [2020-10-13 10:42:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4678 transitions. [2020-10-13 10:42:17,214 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4678 transitions. Word has length 30 [2020-10-13 10:42:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:17,215 INFO L479 AbstractCegarLoop]: Abstraction has 2856 states and 4678 transitions. [2020-10-13 10:42:17,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4678 transitions. [2020-10-13 10:42:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:42:17,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:17,219 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] [2020-10-13 10:42:17,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:42:17,220 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1853614765, now seen corresponding path program 1 times [2020-10-13 10:42:17,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:17,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506852282] [2020-10-13 10:42:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:42:17,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:17,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 10:42:17,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:42:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:17,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:17,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:17,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506852282] [2020-10-13 10:42:17,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:17,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:17,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289494217] [2020-10-13 10:42:17,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:17,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:17,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,321 INFO L87 Difference]: Start difference. First operand 2856 states and 4678 transitions. Second operand 3 states. [2020-10-13 10:42:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:17,371 INFO L93 Difference]: Finished difference Result 4284 states and 7000 transitions. [2020-10-13 10:42:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:17,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-13 10:42:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:17,386 INFO L225 Difference]: With dead ends: 4284 [2020-10-13 10:42:17,386 INFO L226 Difference]: Without dead ends: 2890 [2020-10-13 10:42:17,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2020-10-13 10:42:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2888. [2020-10-13 10:42:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2888 states. [2020-10-13 10:42:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 4678 transitions. [2020-10-13 10:42:17,506 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 4678 transitions. Word has length 31 [2020-10-13 10:42:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:17,506 INFO L479 AbstractCegarLoop]: Abstraction has 2888 states and 4678 transitions. [2020-10-13 10:42:17,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 4678 transitions. [2020-10-13 10:42:17,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:42:17,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:17,510 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] [2020-10-13 10:42:17,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:42:17,511 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:17,511 INFO L82 PathProgramCache]: Analyzing trace with hash 752408789, now seen corresponding path program 1 times [2020-10-13 10:42:17,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:17,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012938450] [2020-10-13 10:42:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:42:17,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 10:42:17,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:42:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:17,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:17,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:17,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:17,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:17,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012938450] [2020-10-13 10:42:17,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:17,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:17,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473081884] [2020-10-13 10:42:17,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:17,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,567 INFO L87 Difference]: Start difference. First operand 2888 states and 4678 transitions. Second operand 3 states. [2020-10-13 10:42:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:17,624 INFO L93 Difference]: Finished difference Result 5260 states and 8712 transitions. [2020-10-13 10:42:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:17,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-13 10:42:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:17,650 INFO L225 Difference]: With dead ends: 5260 [2020-10-13 10:42:17,650 INFO L226 Difference]: Without dead ends: 5258 [2020-10-13 10:42:17,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2020-10-13 10:42:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 4104. [2020-10-13 10:42:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-10-13 10:42:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 6470 transitions. [2020-10-13 10:42:17,754 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 6470 transitions. Word has length 31 [2020-10-13 10:42:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:17,754 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 6470 transitions. [2020-10-13 10:42:17,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 6470 transitions. [2020-10-13 10:42:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:42:17,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:17,761 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] [2020-10-13 10:42:17,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:42:17,761 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1241735917, now seen corresponding path program 1 times [2020-10-13 10:42:17,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:17,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425229436] [2020-10-13 10:42:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:42:17,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:42:17,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:42:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:17,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:17,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:17,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:17,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:17,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:17,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:17,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425229436] [2020-10-13 10:42:17,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:17,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:17,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343027643] [2020-10-13 10:42:17,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:17,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,814 INFO L87 Difference]: Start difference. First operand 4104 states and 6470 transitions. Second operand 3 states. [2020-10-13 10:42:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:17,902 INFO L93 Difference]: Finished difference Result 9676 states and 15368 transitions. [2020-10-13 10:42:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:17,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-13 10:42:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:17,937 INFO L225 Difference]: With dead ends: 9676 [2020-10-13 10:42:17,937 INFO L226 Difference]: Without dead ends: 5642 [2020-10-13 10:42:17,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2020-10-13 10:42:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5640. [2020-10-13 10:42:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2020-10-13 10:42:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 8902 transitions. [2020-10-13 10:42:18,130 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 8902 transitions. Word has length 31 [2020-10-13 10:42:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:18,130 INFO L479 AbstractCegarLoop]: Abstraction has 5640 states and 8902 transitions. [2020-10-13 10:42:18,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 8902 transitions. [2020-10-13 10:42:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:42:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:18,137 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] [2020-10-13 10:42:18,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:42:18,139 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:18,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1850049785, now seen corresponding path program 1 times [2020-10-13 10:42:18,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:18,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239674996] [2020-10-13 10:42:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:18,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:42:18,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-13 10:42:18,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:42:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:18,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:18,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:18,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:18,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:18,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:18,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:18,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:18,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239674996] [2020-10-13 10:42:18,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:18,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:18,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370286945] [2020-10-13 10:42:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:18,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:18,221 INFO L87 Difference]: Start difference. First operand 5640 states and 8902 transitions. Second operand 3 states. [2020-10-13 10:42:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:18,341 INFO L93 Difference]: Finished difference Result 16652 states and 26184 transitions. [2020-10-13 10:42:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:18,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 10:42:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:18,366 INFO L225 Difference]: With dead ends: 16652 [2020-10-13 10:42:18,366 INFO L226 Difference]: Without dead ends: 11082 [2020-10-13 10:42:18,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2020-10-13 10:42:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 11080. [2020-10-13 10:42:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11080 states. [2020-10-13 10:42:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11080 states to 11080 states and 17158 transitions. [2020-10-13 10:42:18,638 INFO L78 Accepts]: Start accepts. Automaton has 11080 states and 17158 transitions. Word has length 32 [2020-10-13 10:42:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:18,638 INFO L479 AbstractCegarLoop]: Abstraction has 11080 states and 17158 transitions. [2020-10-13 10:42:18,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11080 states and 17158 transitions. [2020-10-13 10:42:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:42:18,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:18,656 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] [2020-10-13 10:42:18,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:42:18,656 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -450772805, now seen corresponding path program 1 times [2020-10-13 10:42:18,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:18,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066364339] [2020-10-13 10:42:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:18,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:42:18,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:18,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 10:42:18,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:42:18,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:18,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:18,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:18,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:18,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:18,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:18,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066364339] [2020-10-13 10:42:18,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:18,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:18,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022033722] [2020-10-13 10:42:18,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:18,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:18,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:18,752 INFO L87 Difference]: Start difference. First operand 11080 states and 17158 transitions. Second operand 3 states. [2020-10-13 10:42:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:18,951 INFO L93 Difference]: Finished difference Result 16588 states and 25608 transitions. [2020-10-13 10:42:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:18,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 10:42:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:18,972 INFO L225 Difference]: With dead ends: 16588 [2020-10-13 10:42:18,972 INFO L226 Difference]: Without dead ends: 11146 [2020-10-13 10:42:18,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11146 states. [2020-10-13 10:42:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11146 to 11144. [2020-10-13 10:42:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-10-13 10:42:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 17030 transitions. [2020-10-13 10:42:19,213 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 17030 transitions. Word has length 32 [2020-10-13 10:42:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:19,213 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 17030 transitions. [2020-10-13 10:42:19,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 17030 transitions. [2020-10-13 10:42:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:42:19,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:19,225 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] [2020-10-13 10:42:19,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:42:19,225 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2139716547, now seen corresponding path program 1 times [2020-10-13 10:42:19,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:19,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026238581] [2020-10-13 10:42:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:19,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:19,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:19,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:42:19,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:19,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 10:42:19,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:42:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:19,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:19,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:19,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:19,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:19,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026238581] [2020-10-13 10:42:19,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:19,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:19,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599269125] [2020-10-13 10:42:19,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:19,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:19,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:19,294 INFO L87 Difference]: Start difference. First operand 11144 states and 17030 transitions. Second operand 3 states. [2020-10-13 10:42:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:19,410 INFO L93 Difference]: Finished difference Result 13196 states and 20872 transitions. [2020-10-13 10:42:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:19,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 10:42:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:19,438 INFO L225 Difference]: With dead ends: 13196 [2020-10-13 10:42:19,438 INFO L226 Difference]: Without dead ends: 13194 [2020-10-13 10:42:19,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13194 states. [2020-10-13 10:42:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13194 to 11144. [2020-10-13 10:42:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-10-13 10:42:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 16902 transitions. [2020-10-13 10:42:19,759 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 16902 transitions. Word has length 32 [2020-10-13 10:42:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:19,760 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 16902 transitions. [2020-10-13 10:42:19,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 16902 transitions. [2020-10-13 10:42:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:42:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:19,771 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] [2020-10-13 10:42:19,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:42:19,771 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash 699534184, now seen corresponding path program 1 times [2020-10-13 10:42:19,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:19,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999275078] [2020-10-13 10:42:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:19,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:19,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:19,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:19,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:19,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:19,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:19,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:19,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:19,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:19,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:19,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:19,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:19,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999275078] [2020-10-13 10:42:19,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:19,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:19,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343226538] [2020-10-13 10:42:19,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:19,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:19,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:19,839 INFO L87 Difference]: Start difference. First operand 11144 states and 16902 transitions. Second operand 3 states. [2020-10-13 10:42:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:19,983 INFO L93 Difference]: Finished difference Result 19852 states and 30856 transitions. [2020-10-13 10:42:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:19,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-13 10:42:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:20,022 INFO L225 Difference]: With dead ends: 19852 [2020-10-13 10:42:20,022 INFO L226 Difference]: Without dead ends: 19850 [2020-10-13 10:42:20,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19850 states. [2020-10-13 10:42:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19850 to 16264. [2020-10-13 10:42:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16264 states. [2020-10-13 10:42:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16264 states to 16264 states and 23942 transitions. [2020-10-13 10:42:20,868 INFO L78 Accepts]: Start accepts. Automaton has 16264 states and 23942 transitions. Word has length 33 [2020-10-13 10:42:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:20,868 INFO L479 AbstractCegarLoop]: Abstraction has 16264 states and 23942 transitions. [2020-10-13 10:42:20,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 16264 states and 23942 transitions. [2020-10-13 10:42:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:42:20,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:20,889 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] [2020-10-13 10:42:20,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:42:20,889 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610522, now seen corresponding path program 1 times [2020-10-13 10:42:20,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:20,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668946810] [2020-10-13 10:42:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:20,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:20,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:42:20,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:20,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 10:42:20,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:42:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:20,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:20,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:20,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:20,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:20,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:20,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668946810] [2020-10-13 10:42:20,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:20,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:20,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619459239] [2020-10-13 10:42:20,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:20,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:20,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:20,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:20,944 INFO L87 Difference]: Start difference. First operand 16264 states and 23942 transitions. Second operand 3 states. [2020-10-13 10:42:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:21,151 INFO L93 Difference]: Finished difference Result 38028 states and 56456 transitions. [2020-10-13 10:42:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:21,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-13 10:42:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:21,202 INFO L225 Difference]: With dead ends: 38028 [2020-10-13 10:42:21,202 INFO L226 Difference]: Without dead ends: 21898 [2020-10-13 10:42:21,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21898 states. [2020-10-13 10:42:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21898 to 21896. [2020-10-13 10:42:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21896 states. [2020-10-13 10:42:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21896 states to 21896 states and 32262 transitions. [2020-10-13 10:42:21,715 INFO L78 Accepts]: Start accepts. Automaton has 21896 states and 32262 transitions. Word has length 33 [2020-10-13 10:42:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:21,715 INFO L479 AbstractCegarLoop]: Abstraction has 21896 states and 32262 transitions. [2020-10-13 10:42:21,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 21896 states and 32262 transitions. [2020-10-13 10:42:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:42:21,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:21,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:21,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:42:21,738 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash 210937712, now seen corresponding path program 1 times [2020-10-13 10:42:21,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:21,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015724767] [2020-10-13 10:42:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:21,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:21,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:21,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:42:21,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:21,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 10:42:21,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:42:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:21,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:21,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:21,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:21,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:21,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:21,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:21,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:21,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:21,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:21,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:21,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:21,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:21,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015724767] [2020-10-13 10:42:21,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:21,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:21,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898043712] [2020-10-13 10:42:21,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:21,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:21,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:21,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:21,838 INFO L87 Difference]: Start difference. First operand 21896 states and 32262 transitions. Second operand 3 states. [2020-10-13 10:42:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:22,038 INFO L93 Difference]: Finished difference Result 33036 states and 48648 transitions. [2020-10-13 10:42:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:22,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-13 10:42:22,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:22,073 INFO L225 Difference]: With dead ends: 33036 [2020-10-13 10:42:22,073 INFO L226 Difference]: Without dead ends: 22282 [2020-10-13 10:42:22,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22282 states. [2020-10-13 10:42:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22282 to 22280. [2020-10-13 10:42:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22280 states. [2020-10-13 10:42:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22280 states to 22280 states and 32518 transitions. [2020-10-13 10:42:22,485 INFO L78 Accepts]: Start accepts. Automaton has 22280 states and 32518 transitions. Word has length 34 [2020-10-13 10:42:22,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:22,486 INFO L479 AbstractCegarLoop]: Abstraction has 22280 states and 32518 transitions. [2020-10-13 10:42:22,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 22280 states and 32518 transitions. [2020-10-13 10:42:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:42:22,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:22,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:22,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:42:22,521 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1478006030, now seen corresponding path program 1 times [2020-10-13 10:42:22,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:22,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798626218] [2020-10-13 10:42:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:22,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:22,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:22,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:42:22,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:22,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-13 10:42:22,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:42:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:22,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:22,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:22,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:22,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:22,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:22,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:22,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:22,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:22,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798626218] [2020-10-13 10:42:22,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:22,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:22,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643760294] [2020-10-13 10:42:22,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:22,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:22,738 INFO L87 Difference]: Start difference. First operand 22280 states and 32518 transitions. Second operand 3 states. [2020-10-13 10:42:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:23,003 INFO L93 Difference]: Finished difference Result 38924 states and 58120 transitions. [2020-10-13 10:42:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:23,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-13 10:42:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:23,050 INFO L225 Difference]: With dead ends: 38924 [2020-10-13 10:42:23,050 INFO L226 Difference]: Without dead ends: 38922 [2020-10-13 10:42:23,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38922 states. [2020-10-13 10:42:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38922 to 32776. [2020-10-13 10:42:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32776 states. [2020-10-13 10:42:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32776 states to 32776 states and 46342 transitions. [2020-10-13 10:42:23,845 INFO L78 Accepts]: Start accepts. Automaton has 32776 states and 46342 transitions. Word has length 34 [2020-10-13 10:42:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:23,846 INFO L479 AbstractCegarLoop]: Abstraction has 32776 states and 46342 transitions. [2020-10-13 10:42:23,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32776 states and 46342 transitions. [2020-10-13 10:42:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:42:23,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:23,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:23,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:42:23,872 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash 822816560, now seen corresponding path program 1 times [2020-10-13 10:42:23,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:23,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660754561] [2020-10-13 10:42:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:23,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:23,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:42:23,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:42:23,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:42:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:23,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:23,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:23,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:23,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:23,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:23,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:23,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:23,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:23,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:23,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:23,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660754561] [2020-10-13 10:42:23,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:23,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:23,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474735388] [2020-10-13 10:42:23,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:23,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:23,923 INFO L87 Difference]: Start difference. First operand 32776 states and 46342 transitions. Second operand 3 states. [2020-10-13 10:42:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:24,345 INFO L93 Difference]: Finished difference Result 75788 states and 107784 transitions. [2020-10-13 10:42:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:24,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-13 10:42:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:24,395 INFO L225 Difference]: With dead ends: 75788 [2020-10-13 10:42:24,395 INFO L226 Difference]: Without dead ends: 43530 [2020-10-13 10:42:24,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43530 states. [2020-10-13 10:42:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43530 to 43528. [2020-10-13 10:42:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43528 states. [2020-10-13 10:42:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43528 states to 43528 states and 61446 transitions. [2020-10-13 10:42:26,200 INFO L78 Accepts]: Start accepts. Automaton has 43528 states and 61446 transitions. Word has length 34 [2020-10-13 10:42:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:26,201 INFO L479 AbstractCegarLoop]: Abstraction has 43528 states and 61446 transitions. [2020-10-13 10:42:26,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 43528 states and 61446 transitions. [2020-10-13 10:42:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:42:26,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:26,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:26,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:42:26,225 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1426668155, now seen corresponding path program 1 times [2020-10-13 10:42:26,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:26,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139198114] [2020-10-13 10:42:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:26,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:26,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:26,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:26,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:42:26,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:26,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 10:42:26,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:26,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:26,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:42:26,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:26,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:26,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:26,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:26,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:26,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:26,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:26,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:26,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:26,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:26,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:26,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:26,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:26,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139198114] [2020-10-13 10:42:26,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:26,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:26,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079074173] [2020-10-13 10:42:26,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:26,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:26,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:26,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:26,294 INFO L87 Difference]: Start difference. First operand 43528 states and 61446 transitions. Second operand 3 states. [2020-10-13 10:42:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:26,662 INFO L93 Difference]: Finished difference Result 65292 states and 91912 transitions. [2020-10-13 10:42:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:26,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-10-13 10:42:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:26,711 INFO L225 Difference]: With dead ends: 65292 [2020-10-13 10:42:26,712 INFO L226 Difference]: Without dead ends: 44042 [2020-10-13 10:42:26,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44042 states. [2020-10-13 10:42:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44042 to 44040. [2020-10-13 10:42:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44040 states. [2020-10-13 10:42:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44040 states to 44040 states and 61446 transitions. [2020-10-13 10:42:27,430 INFO L78 Accepts]: Start accepts. Automaton has 44040 states and 61446 transitions. Word has length 35 [2020-10-13 10:42:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:27,431 INFO L479 AbstractCegarLoop]: Abstraction has 44040 states and 61446 transitions. [2020-10-13 10:42:27,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 44040 states and 61446 transitions. [2020-10-13 10:42:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:42:27,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:27,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:27,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:42:27,449 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:27,450 INFO L82 PathProgramCache]: Analyzing trace with hash -262275587, now seen corresponding path program 1 times [2020-10-13 10:42:27,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:27,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182309512] [2020-10-13 10:42:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:27,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:27,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:27,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:42:27,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:27,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 10:42:27,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:27,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:27,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:42:27,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:27,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:27,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:27,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:27,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:27,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:27,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182309512] [2020-10-13 10:42:27,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:27,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:27,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970449565] [2020-10-13 10:42:27,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:27,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:27,497 INFO L87 Difference]: Start difference. First operand 44040 states and 61446 transitions. Second operand 3 states. [2020-10-13 10:42:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:27,912 INFO L93 Difference]: Finished difference Result 75788 states and 108040 transitions. [2020-10-13 10:42:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:27,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-10-13 10:42:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:27,983 INFO L225 Difference]: With dead ends: 75788 [2020-10-13 10:42:27,983 INFO L226 Difference]: Without dead ends: 75786 [2020-10-13 10:42:28,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75786 states. [2020-10-13 10:42:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75786 to 65544. [2020-10-13 10:42:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65544 states. [2020-10-13 10:42:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65544 states to 65544 states and 88582 transitions. [2020-10-13 10:42:28,929 INFO L78 Accepts]: Start accepts. Automaton has 65544 states and 88582 transitions. Word has length 35 [2020-10-13 10:42:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:28,929 INFO L479 AbstractCegarLoop]: Abstraction has 65544 states and 88582 transitions. [2020-10-13 10:42:28,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 65544 states and 88582 transitions. [2020-10-13 10:42:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:42:28,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:28,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:28,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:42:28,971 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:28,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2038547003, now seen corresponding path program 1 times [2020-10-13 10:42:28,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:28,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544732442] [2020-10-13 10:42:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:42:29,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:42:29,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:42:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:29,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:29,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:29,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:29,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:29,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544732442] [2020-10-13 10:42:29,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:29,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:29,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230929491] [2020-10-13 10:42:29,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:29,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:29,018 INFO L87 Difference]: Start difference. First operand 65544 states and 88582 transitions. Second operand 3 states. [2020-10-13 10:42:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:30,853 INFO L93 Difference]: Finished difference Result 150540 states and 204296 transitions. [2020-10-13 10:42:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:30,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-10-13 10:42:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:30,923 INFO L225 Difference]: With dead ends: 150540 [2020-10-13 10:42:30,923 INFO L226 Difference]: Without dead ends: 86026 [2020-10-13 10:42:30,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86026 states. [2020-10-13 10:42:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86026 to 86024. [2020-10-13 10:42:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86024 states. [2020-10-13 10:42:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86024 states to 86024 states and 115718 transitions. [2020-10-13 10:42:32,313 INFO L78 Accepts]: Start accepts. Automaton has 86024 states and 115718 transitions. Word has length 35 [2020-10-13 10:42:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:32,314 INFO L479 AbstractCegarLoop]: Abstraction has 86024 states and 115718 transitions. [2020-10-13 10:42:32,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 86024 states and 115718 transitions. [2020-10-13 10:42:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:42:32,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:32,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:32,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:42:32,360 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash 459606565, now seen corresponding path program 1 times [2020-10-13 10:42:32,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:32,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182711621] [2020-10-13 10:42:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:32,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:32,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:32,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:42:32,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 10:42:32,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:42:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:32,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:32,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:32,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:32,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:32,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:32,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:32,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:32,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:32,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:32,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182711621] [2020-10-13 10:42:32,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:32,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:32,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708709091] [2020-10-13 10:42:32,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:32,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:32,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:32,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:32,435 INFO L87 Difference]: Start difference. First operand 86024 states and 115718 transitions. Second operand 3 states. [2020-10-13 10:42:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:32,969 INFO L93 Difference]: Finished difference Result 129036 states and 173064 transitions. [2020-10-13 10:42:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:32,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-13 10:42:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:33,044 INFO L225 Difference]: With dead ends: 129036 [2020-10-13 10:42:33,044 INFO L226 Difference]: Without dead ends: 87050 [2020-10-13 10:42:33,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87050 states. [2020-10-13 10:42:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87050 to 87048. [2020-10-13 10:42:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87048 states. [2020-10-13 10:42:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87048 states to 87048 states and 115718 transitions. [2020-10-13 10:42:35,745 INFO L78 Accepts]: Start accepts. Automaton has 87048 states and 115718 transitions. Word has length 36 [2020-10-13 10:42:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:35,745 INFO L479 AbstractCegarLoop]: Abstraction has 87048 states and 115718 transitions. [2020-10-13 10:42:35,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 87048 states and 115718 transitions. [2020-10-13 10:42:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:42:35,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:35,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:35,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:42:35,774 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1229337177, now seen corresponding path program 1 times [2020-10-13 10:42:35,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:35,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231407659] [2020-10-13 10:42:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:35,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:35,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:42:35,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:35,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 10:42:35,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:35,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:42:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:35,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:35,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:35,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:35,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:35,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:35,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231407659] [2020-10-13 10:42:35,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:35,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:35,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752909780] [2020-10-13 10:42:35,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:35,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:35,818 INFO L87 Difference]: Start difference. First operand 87048 states and 115718 transitions. Second operand 3 states. [2020-10-13 10:42:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:36,503 INFO L93 Difference]: Finished difference Result 147468 states and 199688 transitions. [2020-10-13 10:42:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:36,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-13 10:42:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:36,680 INFO L225 Difference]: With dead ends: 147468 [2020-10-13 10:42:36,680 INFO L226 Difference]: Without dead ends: 147466 [2020-10-13 10:42:36,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147466 states. [2020-10-13 10:42:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147466 to 131080. [2020-10-13 10:42:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131080 states. [2020-10-13 10:42:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131080 states to 131080 states and 168966 transitions. [2020-10-13 10:42:38,407 INFO L78 Accepts]: Start accepts. Automaton has 131080 states and 168966 transitions. Word has length 36 [2020-10-13 10:42:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:38,407 INFO L479 AbstractCegarLoop]: Abstraction has 131080 states and 168966 transitions. [2020-10-13 10:42:38,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 131080 states and 168966 transitions. [2020-10-13 10:42:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:42:38,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:38,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:38,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:42:38,466 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1071485413, now seen corresponding path program 1 times [2020-10-13 10:42:38,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:38,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553127761] [2020-10-13 10:42:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:38,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:38,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:42:38,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:38,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:42:38,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:38,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:38,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:42:38,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:38,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:38,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:38,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:38,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:38,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:38,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:38,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:38,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553127761] [2020-10-13 10:42:38,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:38,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:38,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43509844] [2020-10-13 10:42:38,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:38,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:38,516 INFO L87 Difference]: Start difference. First operand 131080 states and 168966 transitions. Second operand 3 states. [2020-10-13 10:42:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:41,145 INFO L93 Difference]: Finished difference Result 299020 states and 386056 transitions. [2020-10-13 10:42:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:41,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-13 10:42:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:41,294 INFO L225 Difference]: With dead ends: 299020 [2020-10-13 10:42:41,294 INFO L226 Difference]: Without dead ends: 169994 [2020-10-13 10:42:41,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169994 states. [2020-10-13 10:42:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169994 to 169992. [2020-10-13 10:42:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169992 states. [2020-10-13 10:42:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169992 states to 169992 states and 217094 transitions. [2020-10-13 10:42:43,512 INFO L78 Accepts]: Start accepts. Automaton has 169992 states and 217094 transitions. Word has length 36 [2020-10-13 10:42:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:43,512 INFO L479 AbstractCegarLoop]: Abstraction has 169992 states and 217094 transitions. [2020-10-13 10:42:43,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 169992 states and 217094 transitions. [2020-10-13 10:42:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:42:43,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:43,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:43,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:42:43,568 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash 545468688, now seen corresponding path program 1 times [2020-10-13 10:42:43,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:43,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585915171] [2020-10-13 10:42:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:43,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:43,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 10:42:43,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:42:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:43,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:43,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:43,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:43,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:43,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585915171] [2020-10-13 10:42:43,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:43,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:43,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749254025] [2020-10-13 10:42:43,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:43,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:43,637 INFO L87 Difference]: Start difference. First operand 169992 states and 217094 transitions. Second operand 3 states. [2020-10-13 10:42:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:47,228 INFO L93 Difference]: Finished difference Result 254988 states and 324616 transitions. [2020-10-13 10:42:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:47,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-10-13 10:42:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:47,392 INFO L225 Difference]: With dead ends: 254988 [2020-10-13 10:42:47,392 INFO L226 Difference]: Without dead ends: 172042 [2020-10-13 10:42:47,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172042 states. [2020-10-13 10:42:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172042 to 172040. [2020-10-13 10:42:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172040 states. [2020-10-13 10:42:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172040 states to 172040 states and 217094 transitions. [2020-10-13 10:42:49,587 INFO L78 Accepts]: Start accepts. Automaton has 172040 states and 217094 transitions. Word has length 37 [2020-10-13 10:42:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:49,587 INFO L479 AbstractCegarLoop]: Abstraction has 172040 states and 217094 transitions. [2020-10-13 10:42:49,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 172040 states and 217094 transitions. [2020-10-13 10:42:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:42:49,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:49,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:49,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:42:49,657 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:49,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1143475054, now seen corresponding path program 1 times [2020-10-13 10:42:49,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:49,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609758097] [2020-10-13 10:42:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:49,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:49,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:49,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:49,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:42:49,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:42:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:42:49,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:49,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:49,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:49,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:49,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:49,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:49,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:49,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:49,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:49,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609758097] [2020-10-13 10:42:49,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:49,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:49,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29315076] [2020-10-13 10:42:49,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:49,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:49,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:49,704 INFO L87 Difference]: Start difference. First operand 172040 states and 217094 transitions. Second operand 3 states. [2020-10-13 10:42:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:51,974 INFO L93 Difference]: Finished difference Result 286732 states and 366600 transitions. [2020-10-13 10:42:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:51,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-10-13 10:42:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:52,230 INFO L225 Difference]: With dead ends: 286732 [2020-10-13 10:42:52,230 INFO L226 Difference]: Without dead ends: 286730 [2020-10-13 10:42:52,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286730 states. [2020-10-13 10:42:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286730 to 262152. [2020-10-13 10:42:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262152 states. [2020-10-13 10:42:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262152 states to 262152 states and 321542 transitions. [2020-10-13 10:42:58,019 INFO L78 Accepts]: Start accepts. Automaton has 262152 states and 321542 transitions. Word has length 37 [2020-10-13 10:42:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:58,019 INFO L479 AbstractCegarLoop]: Abstraction has 262152 states and 321542 transitions. [2020-10-13 10:42:58,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 262152 states and 321542 transitions. [2020-10-13 10:42:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:42:58,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:58,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:58,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:42:58,145 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1157347536, now seen corresponding path program 1 times [2020-10-13 10:42:58,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:58,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099646407] [2020-10-13 10:42:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:58,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:58,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:42:58,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:42:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:42:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:58,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:58,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:58,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:42:58,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:58,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:58,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099646407] [2020-10-13 10:42:58,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:58,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:58,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477866352] [2020-10-13 10:42:58,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:58,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:58,188 INFO L87 Difference]: Start difference. First operand 262152 states and 321542 transitions. Second operand 3 states. [2020-10-13 10:43:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:01,459 INFO L93 Difference]: Finished difference Result 593932 states and 727048 transitions. [2020-10-13 10:43:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:01,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-10-13 10:43:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:01,765 INFO L225 Difference]: With dead ends: 593932 [2020-10-13 10:43:01,765 INFO L226 Difference]: Without dead ends: 335882 [2020-10-13 10:43:01,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335882 states. [2020-10-13 10:43:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335882 to 335880. [2020-10-13 10:43:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335880 states. [2020-10-13 10:43:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335880 states to 335880 states and 405510 transitions. [2020-10-13 10:43:11,701 INFO L78 Accepts]: Start accepts. Automaton has 335880 states and 405510 transitions. Word has length 37 [2020-10-13 10:43:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:11,702 INFO L479 AbstractCegarLoop]: Abstraction has 335880 states and 405510 transitions. [2020-10-13 10:43:11,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:43:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 335880 states and 405510 transitions. [2020-10-13 10:43:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:43:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:11,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:11,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:43:11,864 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1087772454, now seen corresponding path program 1 times [2020-10-13 10:43:11,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:11,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649265329] [2020-10-13 10:43:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:11,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:11,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:11,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:43:11,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:11,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 10:43:11,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:43:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:43:11,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:11,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:11,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:11,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:11,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:11,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:11,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:11,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:11,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649265329] [2020-10-13 10:43:11,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:11,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:43:11,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292214624] [2020-10-13 10:43:11,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:43:11,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:43:11,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:11,925 INFO L87 Difference]: Start difference. First operand 335880 states and 405510 transitions. Second operand 3 states. [2020-10-13 10:43:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:18,540 INFO L93 Difference]: Finished difference Result 503820 states and 606216 transitions. [2020-10-13 10:43:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:18,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-10-13 10:43:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:18,917 INFO L225 Difference]: With dead ends: 503820 [2020-10-13 10:43:18,917 INFO L226 Difference]: Without dead ends: 339978 [2020-10-13 10:43:19,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339978 states. [2020-10-13 10:43:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339978 to 339976. [2020-10-13 10:43:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339976 states. [2020-10-13 10:43:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339976 states to 339976 states and 405510 transitions. [2020-10-13 10:43:23,730 INFO L78 Accepts]: Start accepts. Automaton has 339976 states and 405510 transitions. Word has length 38 [2020-10-13 10:43:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:23,730 INFO L479 AbstractCegarLoop]: Abstraction has 339976 states and 405510 transitions. [2020-10-13 10:43:23,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:43:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 339976 states and 405510 transitions. [2020-10-13 10:43:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:43:23,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:23,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:23,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:43:23,884 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:23,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1518251100, now seen corresponding path program 1 times [2020-10-13 10:43:23,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:23,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590956565] [2020-10-13 10:43:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:23,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:23,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:23,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:43:23,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:23,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:43:23,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:43:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:43:23,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:23,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:23,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:23,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:23,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:23,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:23,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:23,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:23,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:23,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590956565] [2020-10-13 10:43:23,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:23,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:43:23,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026027708] [2020-10-13 10:43:23,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:43:23,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:43:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:23,928 INFO L87 Difference]: Start difference. First operand 339976 states and 405510 transitions. Second operand 3 states. [2020-10-13 10:43:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:32,877 INFO L93 Difference]: Finished difference Result 557068 states and 667656 transitions. [2020-10-13 10:43:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:32,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-10-13 10:43:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:33,405 INFO L225 Difference]: With dead ends: 557068 [2020-10-13 10:43:33,405 INFO L226 Difference]: Without dead ends: 557066 [2020-10-13 10:43:33,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557066 states. [2020-10-13 10:43:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557066 to 524296. [2020-10-13 10:43:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524296 states. [2020-10-13 10:43:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524296 states to 524296 states and 610310 transitions. [2020-10-13 10:43:40,378 INFO L78 Accepts]: Start accepts. Automaton has 524296 states and 610310 transitions. Word has length 38 [2020-10-13 10:43:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:40,378 INFO L479 AbstractCegarLoop]: Abstraction has 524296 states and 610310 transitions. [2020-10-13 10:43:40,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:43:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 524296 states and 610310 transitions. [2020-10-13 10:43:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:43:47,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:47,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:47,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:43:47,293 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash -475893606, now seen corresponding path program 1 times [2020-10-13 10:43:47,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:47,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380448859] [2020-10-13 10:43:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:47,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:43:47,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:43:47,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:43:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:43:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:43:47,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:47,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:47,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:47,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:43:47,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:47,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:43:47,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:43:47,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380448859] [2020-10-13 10:43:47,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:43:47,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:43:47,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037458907] [2020-10-13 10:43:47,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:43:47,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:43:47,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:47,340 INFO L87 Difference]: Start difference. First operand 524296 states and 610310 transitions. Second operand 3 states. [2020-10-13 10:43:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:56,684 INFO L93 Difference]: Finished difference Result 1179660 states and 1363976 transitions. [2020-10-13 10:43:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:43:56,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-10-13 10:43:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:57,329 INFO L225 Difference]: With dead ends: 1179660 [2020-10-13 10:43:57,329 INFO L226 Difference]: Without dead ends: 663562 [2020-10-13 10:43:58,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:43:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663562 states. [2020-10-13 10:44:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663562 to 663560. [2020-10-13 10:44:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663560 states. [2020-10-13 10:44:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663560 states to 663560 states and 753670 transitions. [2020-10-13 10:44:16,136 INFO L78 Accepts]: Start accepts. Automaton has 663560 states and 753670 transitions. Word has length 38 [2020-10-13 10:44:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:16,137 INFO L479 AbstractCegarLoop]: Abstraction has 663560 states and 753670 transitions. [2020-10-13 10:44:16,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:44:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 663560 states and 753670 transitions. [2020-10-13 10:44:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:44:16,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:16,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:16,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:44:16,410 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:16,410 INFO L82 PathProgramCache]: Analyzing trace with hash -178639963, now seen corresponding path program 1 times [2020-10-13 10:44:16,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:16,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410857800] [2020-10-13 10:44:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:16,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:16,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:16,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:44:16,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:16,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 10:44:16,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:16,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:44:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:44:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:44:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:16,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:16,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:16,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:16,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:16,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410857800] [2020-10-13 10:44:16,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:16,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:44:16,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355291233] [2020-10-13 10:44:16,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:44:16,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:44:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:16,466 INFO L87 Difference]: Start difference. First operand 663560 states and 753670 transitions. Second operand 3 states. [2020-10-13 10:44:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:27,367 INFO L93 Difference]: Finished difference Result 995340 states and 1126408 transitions. [2020-10-13 10:44:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:44:27,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-10-13 10:44:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:28,076 INFO L225 Difference]: With dead ends: 995340 [2020-10-13 10:44:28,077 INFO L226 Difference]: Without dead ends: 671754 [2020-10-13 10:44:28,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671754 states. [2020-10-13 10:44:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671754 to 671752. [2020-10-13 10:44:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671752 states. [2020-10-13 10:44:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671752 states to 671752 states and 753670 transitions. [2020-10-13 10:44:49,391 INFO L78 Accepts]: Start accepts. Automaton has 671752 states and 753670 transitions. Word has length 39 [2020-10-13 10:44:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:49,391 INFO L479 AbstractCegarLoop]: Abstraction has 671752 states and 753670 transitions. [2020-10-13 10:44:49,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:44:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 671752 states and 753670 transitions. [2020-10-13 10:44:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:44:51,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:51,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:51,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:44:51,066 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1867583705, now seen corresponding path program 1 times [2020-10-13 10:44:51,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:51,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199723919] [2020-10-13 10:44:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:51,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:51,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:51,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:44:51,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:51,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:44:51,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:44:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:44:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:44:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:51,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:51,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:51,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:51,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:51,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:51,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:51,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:51,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:51,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:51,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199723919] [2020-10-13 10:44:51,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:51,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:44:51,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188095408] [2020-10-13 10:44:51,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:44:51,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:44:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:51,108 INFO L87 Difference]: Start difference. First operand 671752 states and 753670 transitions. Second operand 3 states. [2020-10-13 10:45:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:05,334 INFO L93 Difference]: Finished difference Result 1081354 states and 1204231 transitions. [2020-10-13 10:45:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:45:05,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-10-13 10:45:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:07,067 INFO L225 Difference]: With dead ends: 1081354 [2020-10-13 10:45:07,068 INFO L226 Difference]: Without dead ends: 1081352 [2020-10-13 10:45:07,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:45:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081352 states.