/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/array-examples/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:54:18,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:54:18,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:54:18,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:54:18,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:54:18,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:54:18,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:54:18,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:54:18,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:54:18,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:54:18,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:54:18,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:54:18,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:54:18,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:54:18,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:54:18,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:54:18,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:54:18,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:54:18,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:54:18,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:54:18,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:54:18,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:54:18,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:54:18,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:54:18,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:54:18,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:54:18,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:54:18,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:54:18,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:54:18,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:54:18,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:54:18,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:54:18,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:54:18,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:54:18,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:54:18,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:54:18,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:54:18,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:54:18,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:54:18,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:54:18,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:54:18,820 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 04:54:18,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:54:18,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:54:18,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:54:18,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:54:18,873 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:54:18,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:54:18,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:54:18,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:54:18,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:54:18,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:54:18,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:54:18,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:54:18,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:54:18,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:54:18,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:54:18,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:54:18,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:54:18,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:54:18,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:54:18,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:54:18,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:54:18,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:54:18,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:54:18,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:54:18,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:54:18,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:54:18,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:54:18,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:54:18,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:54:18,879 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 04:54:19,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:54:19,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:54:19,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:54:19,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:54:19,180 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:54:19,180 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2020-10-13 04:54:19,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6003761b8/1edaf7f2e919448a9d0884d8a7ef8308/FLAG74ca5b67d [2020-10-13 04:54:19,699 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:54:19,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2020-10-13 04:54:19,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6003761b8/1edaf7f2e919448a9d0884d8a7ef8308/FLAG74ca5b67d [2020-10-13 04:54:20,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6003761b8/1edaf7f2e919448a9d0884d8a7ef8308 [2020-10-13 04:54:20,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:54:20,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:54:20,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:20,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:54:20,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:54:20,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634162df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20, skipping insertion in model container [2020-10-13 04:54:20,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:54:20,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:54:20,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:20,348 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:54:20,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:20,472 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:54:20,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20 WrapperNode [2020-10-13 04:54:20,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:20,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:54:20,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:54:20,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:54:20,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (1/1) ... [2020-10-13 04:54:20,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:54:20,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:54:20,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:54:20,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:54:20,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (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 04:54:20,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:54:20,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:54:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:54:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:54:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:54:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:54:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:54:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:54:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:54:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:54:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:54:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:54:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:54:20,861 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:54:20,861 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-13 04:54:20,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:20 BoogieIcfgContainer [2020-10-13 04:54:20,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:54:20,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:54:20,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:54:20,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:54:20,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:54:20" (1/3) ... [2020-10-13 04:54:20,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9dd2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:20, skipping insertion in model container [2020-10-13 04:54:20,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:20" (2/3) ... [2020-10-13 04:54:20,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9dd2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:20, skipping insertion in model container [2020-10-13 04:54:20,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:20" (3/3) ... [2020-10-13 04:54:20,876 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2020-10-13 04:54:20,888 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:54:20,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:54:20,912 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:54:20,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:54:20,968 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:54:20,968 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:54:20,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:54:20,969 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:54:20,972 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:54:20,972 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:54:20,972 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:54:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 04:54:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:54:21,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:21,001 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 04:54:21,001 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2020-10-13 04:54:21,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:21,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953940844] [2020-10-13 04:54:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:21,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:24,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:54:24,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:54:24,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3130 [2020-10-13 04:54:24,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:54:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:24,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:54:24,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:24,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:24,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:24,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:54:24,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:24,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:24,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:24,367 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 04:54:24,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953940844] [2020-10-13 04:54:24,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:24,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:54:24,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101854690] [2020-10-13 04:54:24,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:54:24,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:54:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:54:24,400 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-13 04:54:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:24,532 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2020-10-13 04:54:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:54:24,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 04:54:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:24,543 INFO L225 Difference]: With dead ends: 71 [2020-10-13 04:54:24,544 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:54:24,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:54:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:54:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 04:54:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:54:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-13 04:54:24,590 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2020-10-13 04:54:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:24,590 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-13 04:54:24,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:54:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-13 04:54:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:54:24,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:24,592 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 04:54:24,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:54:24,593 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2020-10-13 04:54:24,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:24,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362736862] [2020-10-13 04:54:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:24,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:29,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:54:29,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:54:29,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:54:29,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:54:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:29,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:29,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:29,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:29,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:29,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:29,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:29,692 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 04:54:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362736862] [2020-10-13 04:54:29,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:29,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:29,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934057821] [2020-10-13 04:54:29,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:29,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:29,700 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2020-10-13 04:54:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:29,891 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-13 04:54:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:29,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 04:54:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:29,893 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:54:29,894 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:54:29,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:54:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 04:54:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:54:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 04:54:29,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-13 04:54:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:29,914 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 04:54:29,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 04:54:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:54:29,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:29,917 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 04:54:29,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:54:29,918 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2020-10-13 04:54:29,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:29,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55304002] [2020-10-13 04:54:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:34,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:34,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:34,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:54:34,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:54:34,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:54:34,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:34,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:34,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 04:54:34,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:54:34,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:34,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:34,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:34,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:34,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:34,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:34,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:34,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:34,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:34,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 04:54:34,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55304002] [2020-10-13 04:54:34,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:34,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:34,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115115861] [2020-10-13 04:54:34,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:34,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:34,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:34,995 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 5 states. [2020-10-13 04:54:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:35,158 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-13 04:54:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:35,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-13 04:54:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:35,160 INFO L225 Difference]: With dead ends: 87 [2020-10-13 04:54:35,160 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:54:35,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:54:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 04:54:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:54:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 04:54:35,170 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-13 04:54:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:35,171 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 04:54:35,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 04:54:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:54:35,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:35,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:35,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:54:35,173 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2020-10-13 04:54:35,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:35,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525753078] [2020-10-13 04:54:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:35,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:54:40,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:54:40,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:54:40,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:40,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:54:40,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:54:40,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:40,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:40,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:40,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:54:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:40,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:54:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:54:40,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525753078] [2020-10-13 04:54:40,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:40,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:40,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903597606] [2020-10-13 04:54:40,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:40,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:40,280 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2020-10-13 04:54:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:40,480 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-13 04:54:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:40,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-13 04:54:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:40,482 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:54:40,482 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:54:40,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:54:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 04:54:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:54:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 04:54:40,500 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2020-10-13 04:54:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:40,500 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 04:54:40,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 04:54:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:54:40,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:40,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 04:54:40,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:54:40,504 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2020-10-13 04:54:40,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:40,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242607990] [2020-10-13 04:54:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:54:45,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:54:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:54:45,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:54:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:45,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:45,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:45,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:45,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:45,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:45,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:54:45,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242607990] [2020-10-13 04:54:45,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:45,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:45,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444607313] [2020-10-13 04:54:45,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:45,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:45,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:45,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:45,603 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-13 04:54:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:45,778 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-13 04:54:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:45,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-13 04:54:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:45,779 INFO L225 Difference]: With dead ends: 121 [2020-10-13 04:54:45,780 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:54:45,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:54:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 04:54:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:54:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 04:54:45,789 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2020-10-13 04:54:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:45,789 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 04:54:45,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 04:54:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:54:45,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:45,791 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 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 04:54:45,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:54:45,791 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2020-10-13 04:54:45,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:45,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591381478] [2020-10-13 04:54:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:45,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:50,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:50,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:54:50,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:54:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:54:50,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:50,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:54:50,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:54:50,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:50,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:50,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:50,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:50,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:50,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:50,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:50,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:50,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:50,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:50,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 04:54:50,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591381478] [2020-10-13 04:54:50,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:50,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:50,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982858097] [2020-10-13 04:54:50,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:50,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:50,893 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2020-10-13 04:54:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:51,082 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-10-13 04:54:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:51,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-13 04:54:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:51,084 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:54:51,084 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:54:51,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:54:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 04:54:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 04:54:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-13 04:54:51,100 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2020-10-13 04:54:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:51,100 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-13 04:54:51,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-13 04:54:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:54:51,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:51,103 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 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 04:54:51,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:54:51,104 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2020-10-13 04:54:51,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:51,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900958550] [2020-10-13 04:54:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:56,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:54:56,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:54:56,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:54:56,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 04:54:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:54:56,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:56,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:56,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:56,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:56,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:56,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 04:54:56,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900958550] [2020-10-13 04:54:56,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:56,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:56,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112524836] [2020-10-13 04:54:56,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:56,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:56,223 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 9 states. [2020-10-13 04:54:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:56,448 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-13 04:54:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:56,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-13 04:54:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:56,450 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:54:56,450 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:54:56,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:54:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 04:54:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:54:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 04:54:56,469 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 74 [2020-10-13 04:54:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:56,469 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 04:54:56,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 04:54:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:54:56,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:56,474 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 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 04:54:56,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:54:56,474 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:56,475 INFO L82 PathProgramCache]: Analyzing trace with hash 346386898, now seen corresponding path program 6 times [2020-10-13 04:54:56,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:56,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304155701] [2020-10-13 04:54:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:01,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:01,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:55:01,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:55:01,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:55:01,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:55:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:55:01,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:01,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:01,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:01,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:01,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:01,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:01,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-13 04:55:01,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304155701] [2020-10-13 04:55:01,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:01,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:55:01,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861452486] [2020-10-13 04:55:01,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:55:01,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:01,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:55:01,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:55:01,601 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-13 04:55:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:01,869 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-13 04:55:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:55:01,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-13 04:55:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:01,871 INFO L225 Difference]: With dead ends: 172 [2020-10-13 04:55:01,871 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:55:01,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:55:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:55:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 04:55:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:55:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-13 04:55:01,894 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2020-10-13 04:55:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:01,894 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-13 04:55:01,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:55:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-13 04:55:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:55:01,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:01,896 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 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 04:55:01,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:55:01,897 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash -698280774, now seen corresponding path program 7 times [2020-10-13 04:55:01,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:01,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061878361] [2020-10-13 04:55:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:06,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:55:06,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:06,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:55:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:55:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 04:55:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:55:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:07,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:07,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:07,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:07,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-13 04:55:07,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061878361] [2020-10-13 04:55:07,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:07,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:55:07,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184657192] [2020-10-13 04:55:07,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:55:07,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:07,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:55:07,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:55:07,037 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 11 states. [2020-10-13 04:55:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:07,318 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-13 04:55:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:55:07,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2020-10-13 04:55:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:07,319 INFO L225 Difference]: With dead ends: 189 [2020-10-13 04:55:07,320 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:55:07,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:55:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:55:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 04:55:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:55:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-13 04:55:07,328 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 92 [2020-10-13 04:55:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:07,328 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-13 04:55:07,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:55:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-13 04:55:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:55:07,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:07,330 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 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 04:55:07,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:55:07,330 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:07,331 INFO L82 PathProgramCache]: Analyzing trace with hash -732453166, now seen corresponding path program 8 times [2020-10-13 04:55:07,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:07,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818953361] [2020-10-13 04:55:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:12,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:55:12,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:12,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:55:12,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:12,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:55:12,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:12,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:55:12,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:12,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:12,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:12,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:12,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:12,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:12,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:12,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:12,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:12,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:12,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:55:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818953361] [2020-10-13 04:55:12,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:12,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:55:12,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94958383] [2020-10-13 04:55:12,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:55:12,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:55:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:55:12,462 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2020-10-13 04:55:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:12,799 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2020-10-13 04:55:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:55:12,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-13 04:55:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:12,801 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:55:12,801 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:55:12,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:55:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:55:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 04:55:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 04:55:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-13 04:55:12,824 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 101 [2020-10-13 04:55:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:12,824 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-13 04:55:12,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:55:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-13 04:55:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:55:12,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:12,829 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 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 04:55:12,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:55:12,832 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:12,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619322, now seen corresponding path program 9 times [2020-10-13 04:55:12,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:12,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674166373] [2020-10-13 04:55:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:12,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:17,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:55:17,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:17,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:55:17,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:55:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:55:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:55:17,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:17,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:17,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:17,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:17,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:17,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:17,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:17,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:17,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:17,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-13 04:55:17,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674166373] [2020-10-13 04:55:17,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:17,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:55:17,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358421697] [2020-10-13 04:55:17,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:55:17,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:55:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:17,997 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 13 states. [2020-10-13 04:55:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:18,278 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-13 04:55:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:55:18,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-10-13 04:55:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:18,280 INFO L225 Difference]: With dead ends: 223 [2020-10-13 04:55:18,280 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:55:18,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:55:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 04:55:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:55:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-13 04:55:18,289 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-10-13 04:55:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:18,289 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-13 04:55:18,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:55:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-13 04:55:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:55:18,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:18,291 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 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 04:55:18,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:55:18,292 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1132012590, now seen corresponding path program 10 times [2020-10-13 04:55:18,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:18,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954998063] [2020-10-13 04:55:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:18,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:18,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:18,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:23,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:55:23,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:23,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:55:23,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:23,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:55:23,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:55:23,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:55:23,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:23,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:23,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:23,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:23,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:23,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-13 04:55:23,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954998063] [2020-10-13 04:55:23,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:23,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:55:23,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763723524] [2020-10-13 04:55:23,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:55:23,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:55:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:23,438 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2020-10-13 04:55:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:23,753 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2020-10-13 04:55:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:55:23,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-10-13 04:55:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:23,755 INFO L225 Difference]: With dead ends: 240 [2020-10-13 04:55:23,755 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:55:23,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:55:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 04:55:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:55:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-10-13 04:55:23,769 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 119 [2020-10-13 04:55:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:23,769 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-10-13 04:55:23,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:55:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-10-13 04:55:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:55:23,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:23,772 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 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 04:55:23,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:55:23,772 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1513332922, now seen corresponding path program 11 times [2020-10-13 04:55:23,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:23,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355496062] [2020-10-13 04:55:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:23,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:24,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:28,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:28,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:55:28,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:28,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:28,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:28,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:55:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:55:28,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:28,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:28,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 04:55:28,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355496062] [2020-10-13 04:55:28,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:28,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:55:28,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534426539] [2020-10-13 04:55:28,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:55:28,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:55:28,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:28,936 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 15 states. [2020-10-13 04:55:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:29,293 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2020-10-13 04:55:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:55:29,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2020-10-13 04:55:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:29,296 INFO L225 Difference]: With dead ends: 257 [2020-10-13 04:55:29,296 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 04:55:29,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 04:55:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 04:55:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:55:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2020-10-13 04:55:29,304 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 128 [2020-10-13 04:55:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:29,304 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2020-10-13 04:55:29,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:55:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2020-10-13 04:55:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:55:29,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:29,306 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 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 04:55:29,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:55:29,307 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash 892014802, now seen corresponding path program 12 times [2020-10-13 04:55:29,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:29,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706240443] [2020-10-13 04:55:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:29,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:29,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:29,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:34,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:34,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:55:34,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:55:34,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:55:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:55:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:55:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:34,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:34,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:34,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:34,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:34,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:34,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:34,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:34,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-10-13 04:55:34,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706240443] [2020-10-13 04:55:34,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:34,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:55:34,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496836670] [2020-10-13 04:55:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:55:34,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:55:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:34,509 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 16 states. [2020-10-13 04:55:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:34,894 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-10-13 04:55:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:55:34,895 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-13 04:55:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:34,897 INFO L225 Difference]: With dead ends: 274 [2020-10-13 04:55:34,897 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 04:55:34,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 04:55:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 04:55:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 04:55:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2020-10-13 04:55:34,909 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 137 [2020-10-13 04:55:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:34,910 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2020-10-13 04:55:34,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:55:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2020-10-13 04:55:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 04:55:34,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:34,912 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 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 04:55:34,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:55:34,913 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1312905542, now seen corresponding path program 13 times [2020-10-13 04:55:34,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:34,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309967907] [2020-10-13 04:55:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:34,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:34,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:39,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 04:55:39,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:55:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:55:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:55:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:40,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:40,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:40,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:40,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:40,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:40,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-13 04:55:40,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309967907] [2020-10-13 04:55:40,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:40,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:55:40,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659672933] [2020-10-13 04:55:40,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:55:40,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:40,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:55:40,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:40,121 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand 17 states. [2020-10-13 04:55:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:40,498 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2020-10-13 04:55:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:55:40,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2020-10-13 04:55:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:40,500 INFO L225 Difference]: With dead ends: 291 [2020-10-13 04:55:40,500 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:55:40,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:55:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 04:55:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:55:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-13 04:55:40,510 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 146 [2020-10-13 04:55:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:40,510 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-13 04:55:40,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:55:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-13 04:55:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:55:40,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:40,512 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 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 04:55:40,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:55:40,512 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash 305939922, now seen corresponding path program 14 times [2020-10-13 04:55:40,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:40,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855322256] [2020-10-13 04:55:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:40,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:45,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:55:45,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:45,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:45,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:45,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-13 04:55:45,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855322256] [2020-10-13 04:55:45,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:45,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:55:45,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32397414] [2020-10-13 04:55:45,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:55:45,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:55:45,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:45,722 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 18 states. [2020-10-13 04:55:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:46,138 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-10-13 04:55:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:55:46,138 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-10-13 04:55:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:46,140 INFO L225 Difference]: With dead ends: 308 [2020-10-13 04:55:46,140 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 04:55:46,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 04:55:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-13 04:55:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 04:55:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2020-10-13 04:55:46,150 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 155 [2020-10-13 04:55:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:46,151 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2020-10-13 04:55:46,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:55:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2020-10-13 04:55:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 04:55:46,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:46,153 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 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 04:55:46,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:55:46,153 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2109746362, now seen corresponding path program 15 times [2020-10-13 04:55:46,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:46,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999040832] [2020-10-13 04:55:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:51,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:51,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 04:55:51,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:55:51,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:55:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:55:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:51,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:51,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:51,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:51,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:51,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2020-10-13 04:55:51,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999040832] [2020-10-13 04:55:51,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:51,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:55:51,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115218414] [2020-10-13 04:55:51,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:55:51,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:55:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:51,406 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 19 states. [2020-10-13 04:55:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:51,835 INFO L93 Difference]: Finished difference Result 325 states and 351 transitions. [2020-10-13 04:55:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:55:51,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 164 [2020-10-13 04:55:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:51,838 INFO L225 Difference]: With dead ends: 325 [2020-10-13 04:55:51,838 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 04:55:51,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 04:55:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-13 04:55:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 04:55:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2020-10-13 04:55:51,847 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 164 [2020-10-13 04:55:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:51,847 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2020-10-13 04:55:51,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:55:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2020-10-13 04:55:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 04:55:51,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:51,850 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 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 04:55:51,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:55:51,850 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:51,850 INFO L82 PathProgramCache]: Analyzing trace with hash 330463954, now seen corresponding path program 16 times [2020-10-13 04:55:51,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:51,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143583539] [2020-10-13 04:55:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:51,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:56,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:56,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 04:55:56,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:56,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:55:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 04:55:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:55:56,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:57,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:57,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:57,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:57,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:57,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:57,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:57,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:57,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2020-10-13 04:55:57,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143583539] [2020-10-13 04:55:57,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:57,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:55:57,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198645163] [2020-10-13 04:55:57,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:55:57,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:55:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:57,127 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 20 states. [2020-10-13 04:55:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:57,505 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-10-13 04:55:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:55:57,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 173 [2020-10-13 04:55:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:57,507 INFO L225 Difference]: With dead ends: 342 [2020-10-13 04:55:57,507 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 04:55:57,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 04:55:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-13 04:55:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 04:55:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-10-13 04:55:57,516 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 173 [2020-10-13 04:55:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:57,517 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-10-13 04:55:57,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:55:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-10-13 04:55:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 04:55:57,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:57,519 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 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 04:55:57,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:55:57,519 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1002451642, now seen corresponding path program 17 times [2020-10-13 04:55:57,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:57,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008733762] [2020-10-13 04:55:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:56:02,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-10-13 04:56:02,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:56:02,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:02,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:02,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:02,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:02,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:02,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:02,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-13 04:56:02,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008733762] [2020-10-13 04:56:02,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:02,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:56:02,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883993929] [2020-10-13 04:56:02,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:56:02,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:56:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:56:02,812 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 21 states. [2020-10-13 04:56:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:03,235 INFO L93 Difference]: Finished difference Result 359 states and 385 transitions. [2020-10-13 04:56:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:56:03,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-10-13 04:56:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:03,238 INFO L225 Difference]: With dead ends: 359 [2020-10-13 04:56:03,238 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 04:56:03,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:56:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 04:56:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 04:56:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:56:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-13 04:56:03,248 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 182 [2020-10-13 04:56:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:03,249 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-13 04:56:03,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:56:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-13 04:56:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:56:03,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:03,251 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 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 04:56:03,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:56:03,251 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1703260114, now seen corresponding path program 18 times [2020-10-13 04:56:03,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:03,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139852188] [2020-10-13 04:56:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:08,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:08,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:56:08,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:08,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:56:08,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:56:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 04:56:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:56:08,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:08,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:08,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:08,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:08,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-10-13 04:56:08,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139852188] [2020-10-13 04:56:08,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:08,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:56:08,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675302998] [2020-10-13 04:56:08,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:56:08,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:08,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:56:08,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:56:08,591 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2020-10-13 04:56:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:09,043 INFO L93 Difference]: Finished difference Result 376 states and 402 transitions. [2020-10-13 04:56:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:56:09,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2020-10-13 04:56:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:09,046 INFO L225 Difference]: With dead ends: 376 [2020-10-13 04:56:09,046 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 04:56:09,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:56:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 04:56:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-13 04:56:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 04:56:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 214 transitions. [2020-10-13 04:56:09,060 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 214 transitions. Word has length 191 [2020-10-13 04:56:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:09,060 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 214 transitions. [2020-10-13 04:56:09,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:56:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 214 transitions. [2020-10-13 04:56:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-13 04:56:09,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:09,062 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 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 04:56:09,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:56:09,063 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:09,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1564915898, now seen corresponding path program 19 times [2020-10-13 04:56:09,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:09,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025176122] [2020-10-13 04:56:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:09,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:09,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:09,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:09,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:09,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:09,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:14,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:14,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-13 04:56:14,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:14,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:56:14,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:56:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-13 04:56:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:56:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:14,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:14,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:14,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:14,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:14,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:14,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:14,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:14,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:14,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 04:56:14,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025176122] [2020-10-13 04:56:14,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:14,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:56:14,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640209774] [2020-10-13 04:56:14,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:56:14,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:56:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:56:14,429 INFO L87 Difference]: Start difference. First operand 205 states and 214 transitions. Second operand 23 states. [2020-10-13 04:56:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:14,957 INFO L93 Difference]: Finished difference Result 393 states and 419 transitions. [2020-10-13 04:56:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:56:14,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-10-13 04:56:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:14,960 INFO L225 Difference]: With dead ends: 393 [2020-10-13 04:56:14,960 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 04:56:14,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:56:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 04:56:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 04:56:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 04:56:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2020-10-13 04:56:14,986 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 200 [2020-10-13 04:56:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:14,987 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2020-10-13 04:56:14,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:56:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2020-10-13 04:56:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 04:56:14,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:14,989 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 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 04:56:14,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:56:14,989 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash 531490002, now seen corresponding path program 20 times [2020-10-13 04:56:14,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:14,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001364316] [2020-10-13 04:56:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:15,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:15,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:15,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:16,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:20,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 04:56:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:56:20,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:56:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:56:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:20,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:20,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:20,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:20,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:20,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:20,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:20,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:20,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2020-10-13 04:56:20,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001364316] [2020-10-13 04:56:20,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:20,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:56:20,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036234890] [2020-10-13 04:56:20,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:56:20,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:56:20,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:20,359 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2020-10-13 04:56:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:20,912 INFO L93 Difference]: Finished difference Result 410 states and 436 transitions. [2020-10-13 04:56:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:56:20,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-10-13 04:56:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:20,914 INFO L225 Difference]: With dead ends: 410 [2020-10-13 04:56:20,914 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:56:20,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:56:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-13 04:56:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 04:56:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2020-10-13 04:56:20,923 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 209 [2020-10-13 04:56:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:20,924 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2020-10-13 04:56:20,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:56:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2020-10-13 04:56:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-13 04:56:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:20,925 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 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 04:56:20,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:56:20,926 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash -941900102, now seen corresponding path program 21 times [2020-10-13 04:56:20,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:20,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322410821] [2020-10-13 04:56:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:25,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:56:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:26,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:26,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:26,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:26,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:26,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:26,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:26,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2020-10-13 04:56:26,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322410821] [2020-10-13 04:56:26,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:26,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:56:26,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570528345] [2020-10-13 04:56:26,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:56:26,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:26,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:56:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:26,323 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 25 states. [2020-10-13 04:56:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:26,949 INFO L93 Difference]: Finished difference Result 427 states and 453 transitions. [2020-10-13 04:56:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:56:26,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-10-13 04:56:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:26,952 INFO L225 Difference]: With dead ends: 427 [2020-10-13 04:56:26,952 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 04:56:26,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 04:56:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-13 04:56:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 04:56:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2020-10-13 04:56:26,962 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 218 [2020-10-13 04:56:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:26,962 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2020-10-13 04:56:26,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:56:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2020-10-13 04:56:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 04:56:26,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:26,964 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 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 04:56:26,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:56:26,964 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash -970778158, now seen corresponding path program 22 times [2020-10-13 04:56:26,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:26,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005387436] [2020-10-13 04:56:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:27,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:27,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:27,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:32,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:56:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:56:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:32,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:32,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:32,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:32,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:32,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-10-13 04:56:32,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005387436] [2020-10-13 04:56:32,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:32,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:56:32,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990425905] [2020-10-13 04:56:32,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:56:32,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:32,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:56:32,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:32,557 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 26 states. [2020-10-13 04:56:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:33,195 INFO L93 Difference]: Finished difference Result 444 states and 470 transitions. [2020-10-13 04:56:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:56:33,196 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 227 [2020-10-13 04:56:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:33,197 INFO L225 Difference]: With dead ends: 444 [2020-10-13 04:56:33,197 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 04:56:33,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 04:56:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-10-13 04:56:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-13 04:56:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 250 transitions. [2020-10-13 04:56:33,208 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 250 transitions. Word has length 227 [2020-10-13 04:56:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:33,208 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 250 transitions. [2020-10-13 04:56:33,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:56:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 250 transitions. [2020-10-13 04:56:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-13 04:56:33,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:33,210 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 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 04:56:33,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:56:33,216 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1426539706, now seen corresponding path program 23 times [2020-10-13 04:56:33,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:33,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918397538] [2020-10-13 04:56:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:33,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:38,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:38,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-13 04:56:38,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:38,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:56:38,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:38,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:56:38,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:56:38,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:56:38,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:38,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:38,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:38,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:38,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:38,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:38,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:38,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:38,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:38,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:38,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2020-10-13 04:56:38,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918397538] [2020-10-13 04:56:38,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:38,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:56:38,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768582831] [2020-10-13 04:56:38,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:56:38,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:38,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:56:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:38,784 INFO L87 Difference]: Start difference. First operand 241 states and 250 transitions. Second operand 27 states. [2020-10-13 04:56:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:39,292 INFO L93 Difference]: Finished difference Result 461 states and 487 transitions. [2020-10-13 04:56:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:56:39,293 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2020-10-13 04:56:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:39,295 INFO L225 Difference]: With dead ends: 461 [2020-10-13 04:56:39,295 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 04:56:39,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 04:56:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-13 04:56:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 04:56:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2020-10-13 04:56:39,305 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 236 [2020-10-13 04:56:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2020-10-13 04:56:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:56:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2020-10-13 04:56:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 04:56:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:39,308 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 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 04:56:39,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:56:39,308 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -925020462, now seen corresponding path program 24 times [2020-10-13 04:56:39,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:39,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92695311] [2020-10-13 04:56:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:39,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:39,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:39,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:40,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:44,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 04:56:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:56:44,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:44,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:44,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:44,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:44,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:44,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:44,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:44,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:44,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:44,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:44,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 04:56:44,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92695311] [2020-10-13 04:56:44,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:44,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:56:44,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345762434] [2020-10-13 04:56:44,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:56:44,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:44,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:56:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:44,810 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 28 states. [2020-10-13 04:56:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:45,441 INFO L93 Difference]: Finished difference Result 478 states and 504 transitions. [2020-10-13 04:56:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:56:45,442 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2020-10-13 04:56:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:45,443 INFO L225 Difference]: With dead ends: 478 [2020-10-13 04:56:45,444 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 04:56:45,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 04:56:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-10-13 04:56:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 04:56:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-13 04:56:45,455 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 245 [2020-10-13 04:56:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:45,455 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-13 04:56:45,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:56:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-13 04:56:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-13 04:56:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:45,457 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 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 04:56:45,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:56:45,457 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1381059258, now seen corresponding path program 25 times [2020-10-13 04:56:45,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:45,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721606051] [2020-10-13 04:56:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:45,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:50,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:56:50,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:50,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:50,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:50,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:50,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2020-10-13 04:56:51,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721606051] [2020-10-13 04:56:51,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:51,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:56:51,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147422782] [2020-10-13 04:56:51,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:56:51,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:56:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:51,007 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 29 states. [2020-10-13 04:56:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:51,649 INFO L93 Difference]: Finished difference Result 495 states and 521 transitions. [2020-10-13 04:56:51,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:56:51,650 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 254 [2020-10-13 04:56:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:51,651 INFO L225 Difference]: With dead ends: 495 [2020-10-13 04:56:51,652 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 04:56:51,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 04:56:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-13 04:56:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 04:56:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2020-10-13 04:56:51,663 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 254 [2020-10-13 04:56:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:51,663 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2020-10-13 04:56:51,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:56:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2020-10-13 04:56:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 04:56:51,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:51,665 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 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 04:56:51,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:56:51,665 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash 64259026, now seen corresponding path program 26 times [2020-10-13 04:56:51,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:51,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800945288] [2020-10-13 04:56:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:51,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:52,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:56,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:56,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 04:56:56,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:56:56,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:56:56,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:56:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:56:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:56:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:57,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:57,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:57,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:57,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:57,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2020-10-13 04:56:57,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800945288] [2020-10-13 04:56:57,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:57,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:56:57,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135874996] [2020-10-13 04:56:57,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:56:57,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:57,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:56:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:56:57,239 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 30 states. [2020-10-13 04:56:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:57,857 INFO L93 Difference]: Finished difference Result 512 states and 538 transitions. [2020-10-13 04:56:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:56:57,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-13 04:56:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:57,859 INFO L225 Difference]: With dead ends: 512 [2020-10-13 04:56:57,860 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 04:56:57,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:56:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 04:56:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-13 04:56:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-13 04:56:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2020-10-13 04:56:57,870 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 263 [2020-10-13 04:56:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:57,870 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2020-10-13 04:56:57,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:56:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2020-10-13 04:56:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-13 04:56:57,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:57,872 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 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 04:56:57,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:56:57,872 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 21090490, now seen corresponding path program 27 times [2020-10-13 04:56:57,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:57,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524285033] [2020-10-13 04:56:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:59,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:02,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:02,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-13 04:57:02,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:02,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:57:02,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:02,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:57:02,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 04:57:02,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:57:02,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:03,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:03,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:03,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2020-10-13 04:57:03,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524285033] [2020-10-13 04:57:03,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:03,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:57:03,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158453918] [2020-10-13 04:57:03,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:57:03,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:03,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:57:03,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:57:03,466 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 31 states. [2020-10-13 04:57:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:04,154 INFO L93 Difference]: Finished difference Result 529 states and 555 transitions. [2020-10-13 04:57:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:57:04,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 272 [2020-10-13 04:57:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:04,157 INFO L225 Difference]: With dead ends: 529 [2020-10-13 04:57:04,157 INFO L226 Difference]: Without dead ends: 286 [2020-10-13 04:57:04,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:57:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-13 04:57:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-10-13 04:57:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 04:57:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2020-10-13 04:57:04,167 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 272 [2020-10-13 04:57:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:04,167 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2020-10-13 04:57:04,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:57:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2020-10-13 04:57:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-13 04:57:04,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:04,170 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 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 04:57:04,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:57:04,170 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1057011922, now seen corresponding path program 28 times [2020-10-13 04:57:04,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:04,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902709211] [2020-10-13 04:57:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:04,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:09,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 04:57:09,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:57:09,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:09,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:09,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:09,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:09,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:09,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:09,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:09,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:09,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:09,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:09,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:09,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2020-10-13 04:57:09,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902709211] [2020-10-13 04:57:09,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:09,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:57:09,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706109641] [2020-10-13 04:57:09,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:57:09,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:57:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:09,823 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 32 states. [2020-10-13 04:57:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:10,539 INFO L93 Difference]: Finished difference Result 546 states and 572 transitions. [2020-10-13 04:57:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:57:10,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 281 [2020-10-13 04:57:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:10,542 INFO L225 Difference]: With dead ends: 546 [2020-10-13 04:57:10,542 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 04:57:10,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 04:57:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-10-13 04:57:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-13 04:57:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 304 transitions. [2020-10-13 04:57:10,550 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 304 transitions. Word has length 281 [2020-10-13 04:57:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:10,551 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 304 transitions. [2020-10-13 04:57:10,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:57:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 304 transitions. [2020-10-13 04:57:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-13 04:57:10,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:10,552 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 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 04:57:10,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:57:10,552 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash 392222394, now seen corresponding path program 29 times [2020-10-13 04:57:10,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:10,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496489425] [2020-10-13 04:57:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:10,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:11,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:15,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:15,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-13 04:57:15,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:15,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 04:57:15,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:57:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-10-13 04:57:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:57:15,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:16,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:16,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:16,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:16,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:16,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:16,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:16,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:16,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:16,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:16,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2020-10-13 04:57:16,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496489425] [2020-10-13 04:57:16,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:16,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:57:16,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794638116] [2020-10-13 04:57:16,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:57:16,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:57:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:57:16,218 INFO L87 Difference]: Start difference. First operand 295 states and 304 transitions. Second operand 33 states. [2020-10-13 04:57:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:16,972 INFO L93 Difference]: Finished difference Result 563 states and 589 transitions. [2020-10-13 04:57:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:57:16,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 290 [2020-10-13 04:57:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:16,975 INFO L225 Difference]: With dead ends: 563 [2020-10-13 04:57:16,975 INFO L226 Difference]: Without dead ends: 304 [2020-10-13 04:57:16,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:57:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-13 04:57:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-13 04:57:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-13 04:57:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 313 transitions. [2020-10-13 04:57:16,984 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 313 transitions. Word has length 290 [2020-10-13 04:57:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:16,985 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 313 transitions. [2020-10-13 04:57:16,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:57:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 313 transitions. [2020-10-13 04:57:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-13 04:57:16,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:16,987 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 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 04:57:16,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:57:16,987 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1369838126, now seen corresponding path program 30 times [2020-10-13 04:57:16,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:16,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527326076] [2020-10-13 04:57:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:22,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:57:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:22,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:22,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:22,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:22,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:22,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:22,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:22,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:22,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:22,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:22,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:22,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4185 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-10-13 04:57:22,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527326076] [2020-10-13 04:57:22,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:22,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:57:22,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344544501] [2020-10-13 04:57:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:57:22,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:57:22,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:22,665 INFO L87 Difference]: Start difference. First operand 304 states and 313 transitions. Second operand 34 states. [2020-10-13 04:57:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:23,440 INFO L93 Difference]: Finished difference Result 580 states and 606 transitions. [2020-10-13 04:57:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:57:23,441 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 299 [2020-10-13 04:57:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:23,443 INFO L225 Difference]: With dead ends: 580 [2020-10-13 04:57:23,443 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 04:57:23,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 04:57:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2020-10-13 04:57:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-13 04:57:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 322 transitions. [2020-10-13 04:57:23,453 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 322 transitions. Word has length 299 [2020-10-13 04:57:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:23,453 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 322 transitions. [2020-10-13 04:57:23,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:57:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 322 transitions. [2020-10-13 04:57:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-13 04:57:23,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:23,456 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 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 04:57:23,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:57:23,456 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1043750074, now seen corresponding path program 31 times [2020-10-13 04:57:23,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:23,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965569810] [2020-10-13 04:57:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:23,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:23,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:23,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:23,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:24,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:25,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:28,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:28,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-13 04:57:28,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:28,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 04:57:28,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:57:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:57:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:57:28,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:29,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:29,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:29,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:29,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:29,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:29,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:29,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4464 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3968 trivial. 0 not checked. [2020-10-13 04:57:29,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965569810] [2020-10-13 04:57:29,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:29,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:57:29,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696612274] [2020-10-13 04:57:29,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:57:29,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:57:29,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:29,210 INFO L87 Difference]: Start difference. First operand 313 states and 322 transitions. Second operand 35 states. [2020-10-13 04:57:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:29,980 INFO L93 Difference]: Finished difference Result 597 states and 623 transitions. [2020-10-13 04:57:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:57:29,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 308 [2020-10-13 04:57:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:29,983 INFO L225 Difference]: With dead ends: 597 [2020-10-13 04:57:29,983 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 04:57:29,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 04:57:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-13 04:57:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-13 04:57:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2020-10-13 04:57:29,998 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 308 [2020-10-13 04:57:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:29,998 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2020-10-13 04:57:29,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:57:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2020-10-13 04:57:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-13 04:57:30,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:30,002 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 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 04:57:30,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:57:30,002 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:30,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1909990098, now seen corresponding path program 32 times [2020-10-13 04:57:30,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:30,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544415741] [2020-10-13 04:57:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:30,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:30,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:30,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:30,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:35,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:57:35,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:35,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:35,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:35,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:35,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:35,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:35,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:35,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:35,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2020-10-13 04:57:35,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544415741] [2020-10-13 04:57:35,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:35,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:57:35,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282200296] [2020-10-13 04:57:35,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:57:35,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:57:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:57:35,790 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 36 states. [2020-10-13 04:57:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:36,633 INFO L93 Difference]: Finished difference Result 614 states and 640 transitions. [2020-10-13 04:57:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:57:36,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 317 [2020-10-13 04:57:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:36,636 INFO L225 Difference]: With dead ends: 614 [2020-10-13 04:57:36,636 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 04:57:36,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:57:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 04:57:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-10-13 04:57:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-13 04:57:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 340 transitions. [2020-10-13 04:57:36,646 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 340 transitions. Word has length 317 [2020-10-13 04:57:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:36,646 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 340 transitions. [2020-10-13 04:57:36,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:57:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 340 transitions. [2020-10-13 04:57:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-13 04:57:36,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:36,648 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 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 04:57:36,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:57:36,649 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1823841606, now seen corresponding path program 33 times [2020-10-13 04:57:36,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:36,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260572062] [2020-10-13 04:57:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:36,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:36,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:37,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:39,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:41,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:57:41,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:42,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:42,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:42,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:42,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:42,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:42,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2020-10-13 04:57:42,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260572062] [2020-10-13 04:57:42,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:42,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:57:42,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188434441] [2020-10-13 04:57:42,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:57:42,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:57:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:57:42,449 INFO L87 Difference]: Start difference. First operand 331 states and 340 transitions. Second operand 37 states. [2020-10-13 04:57:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:43,233 INFO L93 Difference]: Finished difference Result 631 states and 657 transitions. [2020-10-13 04:57:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:57:43,233 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 326 [2020-10-13 04:57:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:43,236 INFO L225 Difference]: With dead ends: 631 [2020-10-13 04:57:43,236 INFO L226 Difference]: Without dead ends: 340 [2020-10-13 04:57:43,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:57:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-13 04:57:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-13 04:57:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 04:57:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-10-13 04:57:43,246 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 326 [2020-10-13 04:57:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:43,246 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-10-13 04:57:43,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:57:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-10-13 04:57:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-13 04:57:43,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:43,248 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 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 04:57:43,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:57:43,249 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 359880658, now seen corresponding path program 34 times [2020-10-13 04:57:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318952669] [2020-10-13 04:57:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:46,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:57:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-13 04:57:48,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:57:48,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:49,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:49,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:49,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-10-13 04:57:49,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318952669] [2020-10-13 04:57:49,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:49,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:57:49,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256073602] [2020-10-13 04:57:49,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:57:49,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:57:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:57:49,136 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 38 states. [2020-10-13 04:57:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:49,989 INFO L93 Difference]: Finished difference Result 648 states and 674 transitions. [2020-10-13 04:57:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:57:49,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 335 [2020-10-13 04:57:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:49,992 INFO L225 Difference]: With dead ends: 648 [2020-10-13 04:57:49,992 INFO L226 Difference]: Without dead ends: 349 [2020-10-13 04:57:49,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:57:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-13 04:57:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2020-10-13 04:57:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-13 04:57:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 358 transitions. [2020-10-13 04:57:50,001 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 358 transitions. Word has length 335 [2020-10-13 04:57:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:50,001 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 358 transitions. [2020-10-13 04:57:50,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:57:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 358 transitions. [2020-10-13 04:57:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-13 04:57:50,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:50,004 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 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 04:57:50,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:57:50,004 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:50,004 INFO L82 PathProgramCache]: Analyzing trace with hash 673507514, now seen corresponding path program 35 times [2020-10-13 04:57:50,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:50,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681656298] [2020-10-13 04:57:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:50,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:50,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:55,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:55,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:57:55,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:55,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:55,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:55,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:55,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:55,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:55,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:55,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:55,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:55,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:55,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5670 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-10-13 04:57:55,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681656298] [2020-10-13 04:57:55,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:55,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:57:55,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709375150] [2020-10-13 04:57:55,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:57:55,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:57:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:57:55,888 INFO L87 Difference]: Start difference. First operand 349 states and 358 transitions. Second operand 39 states. [2020-10-13 04:57:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:56,756 INFO L93 Difference]: Finished difference Result 665 states and 691 transitions. [2020-10-13 04:57:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:57:56,757 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 344 [2020-10-13 04:57:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:56,759 INFO L225 Difference]: With dead ends: 665 [2020-10-13 04:57:56,759 INFO L226 Difference]: Without dead ends: 358 [2020-10-13 04:57:56,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:57:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-13 04:57:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-10-13 04:57:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 04:57:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 367 transitions. [2020-10-13 04:57:56,770 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 367 transitions. Word has length 344 [2020-10-13 04:57:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:56,770 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 367 transitions. [2020-10-13 04:57:56,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:57:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 367 transitions. [2020-10-13 04:57:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-13 04:57:56,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:56,773 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 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 04:57:56,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:57:56,773 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 287542482, now seen corresponding path program 36 times [2020-10-13 04:57:56,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:56,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376411982] [2020-10-13 04:57:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:57,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:57,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:01,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-13 04:58:01,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:58:01,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:58:01,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:58:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-13 04:58:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:58:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:02,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:02,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:02,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:02,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:02,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:02,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:02,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 5328 trivial. 0 not checked. [2020-10-13 04:58:02,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376411982] [2020-10-13 04:58:02,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:02,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:58:02,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443774693] [2020-10-13 04:58:02,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:58:02,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:58:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:58:02,740 INFO L87 Difference]: Start difference. First operand 358 states and 367 transitions. Second operand 40 states. [2020-10-13 04:58:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:03,626 INFO L93 Difference]: Finished difference Result 682 states and 708 transitions. [2020-10-13 04:58:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:58:03,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 353 [2020-10-13 04:58:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:03,629 INFO L225 Difference]: With dead ends: 682 [2020-10-13 04:58:03,630 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 04:58:03,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:58:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 04:58:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2020-10-13 04:58:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-13 04:58:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 376 transitions. [2020-10-13 04:58:03,640 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 376 transitions. Word has length 353 [2020-10-13 04:58:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:03,640 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 376 transitions. [2020-10-13 04:58:03,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:58:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 376 transitions. [2020-10-13 04:58:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-13 04:58:03,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:03,643 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 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 04:58:03,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:58:03,643 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2108821830, now seen corresponding path program 37 times [2020-10-13 04:58:03,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:03,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65157168] [2020-10-13 04:58:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:03,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-10-13 04:58:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:58:08,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:09,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:09,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:09,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:09,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:09,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:09,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6327 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 5624 trivial. 0 not checked. [2020-10-13 04:58:09,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65157168] [2020-10-13 04:58:09,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:09,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:58:09,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607168231] [2020-10-13 04:58:09,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:58:09,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:58:09,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:58:09,655 INFO L87 Difference]: Start difference. First operand 367 states and 376 transitions. Second operand 41 states. [2020-10-13 04:58:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:10,661 INFO L93 Difference]: Finished difference Result 699 states and 725 transitions. [2020-10-13 04:58:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:58:10,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 362 [2020-10-13 04:58:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:10,664 INFO L225 Difference]: With dead ends: 699 [2020-10-13 04:58:10,664 INFO L226 Difference]: Without dead ends: 376 [2020-10-13 04:58:10,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:58:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-13 04:58:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-10-13 04:58:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 04:58:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 385 transitions. [2020-10-13 04:58:10,674 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 385 transitions. Word has length 362 [2020-10-13 04:58:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:10,674 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 385 transitions. [2020-10-13 04:58:10,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:58:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 385 transitions. [2020-10-13 04:58:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-13 04:58:10,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:10,677 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 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 04:58:10,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:58:10,677 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1222689234, now seen corresponding path program 38 times [2020-10-13 04:58:10,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:10,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091751397] [2020-10-13 04:58:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:11,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:58:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:16,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:16,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:16,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:16,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6669 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5928 trivial. 0 not checked. [2020-10-13 04:58:16,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091751397] [2020-10-13 04:58:16,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:16,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:58:16,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053929229] [2020-10-13 04:58:16,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:58:16,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:16,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:58:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:58:16,755 INFO L87 Difference]: Start difference. First operand 376 states and 385 transitions. Second operand 42 states. [2020-10-13 04:58:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:17,709 INFO L93 Difference]: Finished difference Result 716 states and 742 transitions. [2020-10-13 04:58:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:58:17,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 371 [2020-10-13 04:58:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:17,713 INFO L225 Difference]: With dead ends: 716 [2020-10-13 04:58:17,713 INFO L226 Difference]: Without dead ends: 385 [2020-10-13 04:58:17,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:58:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-13 04:58:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2020-10-13 04:58:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-13 04:58:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 394 transitions. [2020-10-13 04:58:17,722 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 394 transitions. Word has length 371 [2020-10-13 04:58:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:17,723 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 394 transitions. [2020-10-13 04:58:17,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:58:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 394 transitions. [2020-10-13 04:58:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-13 04:58:17,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:17,725 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 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 04:58:17,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:58:17,726 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 458060986, now seen corresponding path program 39 times [2020-10-13 04:58:17,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:17,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309422945] [2020-10-13 04:58:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking...