/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_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:54:34,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:54:34,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:54:34,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:54:34,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:54:34,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:54:34,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:54:34,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:54:34,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:54:34,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:54:34,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:54:34,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:54:34,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:54:34,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:54:34,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:54:34,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:54:34,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:54:34,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:54:34,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:54:34,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:54:34,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:54:34,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:54:34,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:54:34,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:54:34,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:54:34,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:54:34,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:54:34,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:54:34,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:54:34,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:54:34,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:54:34,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:54:34,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:54:34,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:54:34,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:54:34,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:54:34,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:54:34,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:54:34,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:54:34,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:54:34,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:54:34,660 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 04:54:34,703 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:54:34,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:54:34,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:54:34,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:54:34,706 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:54:34,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:54:34,706 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:54:34,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:54:34,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:54:34,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:54:34,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:54:34,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:54:34,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:54:34,709 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:54:34,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:54:34,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:54:34,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:54:34,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:54:34,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:54:34,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:54:34,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:54:34,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:54:34,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:54:34,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:54:34,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:54:34,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:54:34,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:54:34,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:54:34,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:54:34,712 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 04:54:35,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:54:35,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:54:35,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:54:35,023 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:54:35,023 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:54:35,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2020-10-13 04:54:35,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34b2c3b56/8b8922c2d9404b67b4fee61721c273d2/FLAG40d6f6fa6 [2020-10-13 04:54:35,524 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:54:35,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2020-10-13 04:54:35,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34b2c3b56/8b8922c2d9404b67b4fee61721c273d2/FLAG40d6f6fa6 [2020-10-13 04:54:35,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34b2c3b56/8b8922c2d9404b67b4fee61721c273d2 [2020-10-13 04:54:35,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:54:35,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:54:35,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:35,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:54:35,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:54:35,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:35" (1/1) ... [2020-10-13 04:54:35,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603d5fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:35, skipping insertion in model container [2020-10-13 04:54:35,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:35" (1/1) ... [2020-10-13 04:54:35,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:54:35,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:54:36,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:36,133 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:54:36,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:36,169 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:54:36,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36 WrapperNode [2020-10-13 04:54:36,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:36,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:54:36,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:54:36,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:54:36,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (1/1) ... [2020-10-13 04:54:36,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:54:36,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:54:36,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:54:36,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:54:36,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (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 04:54:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:54:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:54:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:54:36,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:54:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:54:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:54:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:54:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:54:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:54:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:54:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:54:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:54:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:54:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:54:36,579 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:54:36,579 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:54:36,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:36 BoogieIcfgContainer [2020-10-13 04:54:36,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:54:36,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:54:36,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:54:36,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:54:36,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:54:35" (1/3) ... [2020-10-13 04:54:36,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c2fb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:36, skipping insertion in model container [2020-10-13 04:54:36,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:36" (2/3) ... [2020-10-13 04:54:36,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c2fb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:36, skipping insertion in model container [2020-10-13 04:54:36,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:36" (3/3) ... [2020-10-13 04:54:36,595 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2020-10-13 04:54:36,612 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:54:36,621 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:54:36,639 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:54:36,671 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:54:36,672 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:54:36,672 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:54:36,672 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:54:36,672 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:54:36,673 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:54:36,673 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:54:36,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:54:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-13 04:54:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:54:36,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:36,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:36,704 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2020-10-13 04:54:36,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:36,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149322084] [2020-10-13 04:54:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:36,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:54:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-13 04:54:36,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 04:54:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:36,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:54:37,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:37,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:37,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:54:37,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:37,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:37,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:37,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:37,081 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 04:54:37,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149322084] [2020-10-13 04:54:37,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:37,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:54:37,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218084888] [2020-10-13 04:54:37,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:54:37,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:54:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:54:37,118 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-13 04:54:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:37,302 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-13 04:54:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:54:37,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 04:54:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:37,320 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:54:37,320 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:54:37,327 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 04:54:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:54:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 04:54:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:54:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 04:54:37,381 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-10-13 04:54:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:37,382 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 04:54:37,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:54:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 04:54:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:54:37,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:37,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:37,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:54:37,385 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:37,386 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2020-10-13 04:54:37,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:37,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747488771] [2020-10-13 04:54:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:54:37,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:37,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-13 04:54:37,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:37,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:37,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:37,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:54:37,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:37,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:37,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:37,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:37,655 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 04:54:37,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747488771] [2020-10-13 04:54:37,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:37,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:37,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798309355] [2020-10-13 04:54:37,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:37,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:37,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:37,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:37,660 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-13 04:54:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:37,721 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-13 04:54:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:37,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 04:54:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:37,723 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:54:37,724 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:54:37,725 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 04:54:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:54:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 04:54:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:54:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 04:54:37,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-10-13 04:54:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:37,733 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 04:54:37,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 04:54:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:54:37,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:37,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:37,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:54:37,735 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1675123339, now seen corresponding path program 1 times [2020-10-13 04:54:37,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:37,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786301506] [2020-10-13 04:54:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:54:37,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-13 04:54:37,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:54:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:37,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:37,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:37,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:37,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:37,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:37,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:54:37,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786301506] [2020-10-13 04:54:37,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:37,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:37,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144450200] [2020-10-13 04:54:37,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:37,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:37,946 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 04:54:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:38,010 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 04:54:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:38,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:54:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:38,012 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:54:38,012 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:54:38,013 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 04:54:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:54:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-13 04:54:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:54:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 04:54:38,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 04:54:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:38,020 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 04:54:38,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 04:54:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:54:38,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:38,021 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] [2020-10-13 04:54:38,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:54:38,021 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2020-10-13 04:54:38,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:38,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637968550] [2020-10-13 04:54:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:38,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:38,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:54:38,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:38,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-13 04:54:38,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:38,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:38,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:54:38,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:38,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:38,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:38,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:38,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:54:38,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:38,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:54:38,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637968550] [2020-10-13 04:54:38,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:38,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:38,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374105230] [2020-10-13 04:54:38,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:38,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:38,321 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 04:54:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:38,391 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-13 04:54:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:38,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:54:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:38,393 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:54:38,393 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:54:38,394 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 04:54:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:54:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 04:54:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:54:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 04:54:38,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2020-10-13 04:54:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:38,403 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 04:54:38,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 04:54:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:54:38,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:38,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:38,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:54:38,405 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:38,406 INFO L82 PathProgramCache]: Analyzing trace with hash -392904637, now seen corresponding path program 2 times [2020-10-13 04:54:38,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:38,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136845128] [2020-10-13 04:54:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:38,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:54:38,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:38,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 04:54:38,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:54:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:54:38,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:38,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:38,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:38,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:38,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:38,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:38,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:54:38,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136845128] [2020-10-13 04:54:38,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:38,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:38,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023712823] [2020-10-13 04:54:38,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:38,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:38,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:38,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:38,631 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 04:54:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:38,712 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-13 04:54:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:38,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 04:54:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:38,714 INFO L225 Difference]: With dead ends: 43 [2020-10-13 04:54:38,714 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:54:38,715 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 04:54:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:54:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-13 04:54:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:54:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 04:54:38,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-13 04:54:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:38,723 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 04:54:38,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 04:54:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:54:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:38,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:38,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:54:38,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1510721175, now seen corresponding path program 3 times [2020-10-13 04:54:38,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:38,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853611944] [2020-10-13 04:54:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:38,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:38,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:54:38,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-13 04:54:38,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:54:38,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:39,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:39,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:39,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:39,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:39,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:39,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:39,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:54:39,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853611944] [2020-10-13 04:54:39,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:39,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:39,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237022042] [2020-10-13 04:54:39,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:39,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:39,053 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 04:54:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:39,149 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-13 04:54:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:39,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 04:54:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:39,151 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:54:39,151 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:54:39,152 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 04:54:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:54:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:54:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:54:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:54:39,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2020-10-13 04:54:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:39,158 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:54:39,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:54:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:54:39,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:39,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:39,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:54:39,160 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1100015481, now seen corresponding path program 4 times [2020-10-13 04:54:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:39,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636805807] [2020-10-13 04:54:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:39,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:39,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:39,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:39,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:54:39,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:39,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-13 04:54:39,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:39,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:54:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:39,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:39,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:39,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:39,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:39,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:54:39,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636805807] [2020-10-13 04:54:39,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:39,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:39,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010761301] [2020-10-13 04:54:39,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:39,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:39,619 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-13 04:54:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:39,694 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-13 04:54:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:39,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:54:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:39,695 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:54:39,695 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:54:39,696 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 04:54:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:54:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-13 04:54:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:54:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 04:54:39,702 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 27 [2020-10-13 04:54:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:39,702 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 04:54:39,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 04:54:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:54:39,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:39,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:39,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:54:39,704 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash -235287899, now seen corresponding path program 5 times [2020-10-13 04:54:39,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:39,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171641575] [2020-10-13 04:54:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:54:40,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:40,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-13 04:54:40,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:40,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:40,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:40,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:40,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:40,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:40,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:40,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:40,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:40,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:54:40,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171641575] [2020-10-13 04:54:40,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:40,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:40,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262420045] [2020-10-13 04:54:40,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:40,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:40,183 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-13 04:54:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:40,268 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-13 04:54:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:40,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 04:54:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:40,270 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:54:40,270 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:54:40,271 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 04:54:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:54:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 04:54:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:54:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 04:54:40,276 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 04:54:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:40,277 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 04:54:40,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 04:54:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:54:40,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:40,278 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:40,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:54:40,279 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -777802169, now seen corresponding path program 6 times [2020-10-13 04:54:40,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:40,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301910703] [2020-10-13 04:54:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:54:40,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:40,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-13 04:54:40,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:54:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:40,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:40,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:40,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:40,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:40,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:40,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:40,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:54:40,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301910703] [2020-10-13 04:54:40,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:40,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:40,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641675000] [2020-10-13 04:54:40,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:40,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:40,861 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-13 04:54:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:40,932 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-13 04:54:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:40,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 04:54:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:40,933 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:54:40,933 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:54:40,934 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 04:54:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:54:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 04:54:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:54:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-13 04:54:40,940 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 32 [2020-10-13 04:54:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:40,940 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-13 04:54:40,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-13 04:54:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:54:40,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:40,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:40,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:54:40,942 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1851994473, now seen corresponding path program 7 times [2020-10-13 04:54:40,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:40,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056968209] [2020-10-13 04:54:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:41,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:54:41,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:41,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-13 04:54:41,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:54:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:54:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:41,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:41,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:41,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:41,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:41,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:54:41,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056968209] [2020-10-13 04:54:41,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:41,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:41,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446530534] [2020-10-13 04:54:41,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:41,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:41,603 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2020-10-13 04:54:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:41,700 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-13 04:54:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:41,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-13 04:54:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:41,701 INFO L225 Difference]: With dead ends: 55 [2020-10-13 04:54:41,701 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:54:41,702 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 04:54:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:54:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-13 04:54:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:54:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-13 04:54:41,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-10-13 04:54:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:41,708 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-13 04:54:41,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-13 04:54:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:54:41,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:41,709 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:41,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:54:41,709 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash -657101181, now seen corresponding path program 8 times [2020-10-13 04:54:41,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:41,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264895438] [2020-10-13 04:54:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:42,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:54:42,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:42,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-13 04:54:42,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:54:42,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:42,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:42,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:42,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:42,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:42,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:42,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:54:42,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264895438] [2020-10-13 04:54:42,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:42,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:42,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616325898] [2020-10-13 04:54:42,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:42,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:42,646 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 9 states. [2020-10-13 04:54:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:42,765 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-13 04:54:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:42,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 04:54:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:42,767 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:54:42,767 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:54:42,768 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 04:54:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:54:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:54:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:54:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-13 04:54:42,774 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2020-10-13 04:54:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:42,774 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-13 04:54:42,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-13 04:54:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:54:42,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:42,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:42,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:54:42,776 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash 542412961, now seen corresponding path program 9 times [2020-10-13 04:54:42,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:42,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767981824] [2020-10-13 04:54:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:42,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:43,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:54:43,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-13 04:54:43,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:54:43,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:54:43,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:43,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:43,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:43,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:43,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:43,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:43,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:54:43,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767981824] [2020-10-13 04:54:43,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:43,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:43,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948305541] [2020-10-13 04:54:43,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:43,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:43,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:43,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:44,000 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-10-13 04:54:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:44,090 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-13 04:54:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:44,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 04:54:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:44,092 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:54:44,092 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:54:44,093 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 04:54:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:54:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 04:54:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:54:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-13 04:54:44,099 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2020-10-13 04:54:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:44,100 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-13 04:54:44,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-13 04:54:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:54:44,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:44,101 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:44,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:54:44,102 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1082991691, now seen corresponding path program 10 times [2020-10-13 04:54:44,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:44,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242627787] [2020-10-13 04:54:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:45,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:54:45,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:45,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1382 [2020-10-13 04:54:45,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:45,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:54:45,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:45,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:54:45,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:45,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:45,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:45,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:45,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:45,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:45,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:54:45,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242627787] [2020-10-13 04:54:45,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:45,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:54:45,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738942168] [2020-10-13 04:54:45,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:54:45,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:54:45,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:45,588 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-13 04:54:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:45,699 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-13 04:54:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:54:45,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:54:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:45,701 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:54:45,702 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:54:45,703 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 04:54:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:54:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 04:54:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:54:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-13 04:54:45,707 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 42 [2020-10-13 04:54:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:45,708 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-13 04:54:45,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:54:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-13 04:54:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:54:45,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:45,709 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:45,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:54:45,709 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 140813549, now seen corresponding path program 11 times [2020-10-13 04:54:45,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:45,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370148696] [2020-10-13 04:54:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:47,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:54:47,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:47,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-13 04:54:47,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:54:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:47,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:54:47,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:47,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:47,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:47,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:47,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:47,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:54:47,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370148696] [2020-10-13 04:54:47,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:47,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:54:47,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166703438] [2020-10-13 04:54:47,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:54:47,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:47,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:54:47,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:47,224 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 11 states. [2020-10-13 04:54:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:47,331 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-13 04:54:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:54:47,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 04:54:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:47,333 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:54:47,333 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:54:47,333 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 04:54:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:54:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 04:54:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:54:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-13 04:54:47,345 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 44 [2020-10-13 04:54:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:47,346 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-13 04:54:47,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:54:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-13 04:54:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:54:47,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:47,347 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:47,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:54:47,348 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash 945718543, now seen corresponding path program 12 times [2020-10-13 04:54:47,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:47,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395180617] [2020-10-13 04:54:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:48,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:48,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:54:48,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:48,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1567 [2020-10-13 04:54:48,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:48,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:54:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:54:48,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:49,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:49,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:49,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:49,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:49,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:49,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:49,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:54:49,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395180617] [2020-10-13 04:54:49,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:49,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:49,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276189643] [2020-10-13 04:54:49,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:49,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:49,046 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2020-10-13 04:54:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:49,141 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-13 04:54:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:49,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-13 04:54:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:49,143 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:54:49,143 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:54:49,144 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 04:54:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:54:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-13 04:54:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:54:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-13 04:54:49,159 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 46 [2020-10-13 04:54:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:49,159 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-13 04:54:49,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-13 04:54:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:54:49,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:49,160 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:49,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:54:49,162 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1358909155, now seen corresponding path program 13 times [2020-10-13 04:54:49,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:49,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427550402] [2020-10-13 04:54:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:51,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:54:51,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:51,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1962 [2020-10-13 04:54:51,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:51,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:54:51,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:54:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:51,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:51,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:51,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:51,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:54:51,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427550402] [2020-10-13 04:54:51,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:51,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:54:51,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190232476] [2020-10-13 04:54:51,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:54:51,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:54:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:51,261 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 12 states. [2020-10-13 04:54:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:51,367 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-13 04:54:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:54:51,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 04:54:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:51,368 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:54:51,369 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:54:51,369 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 04:54:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:54:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:54:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:54:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-13 04:54:51,378 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 49 [2020-10-13 04:54:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:51,378 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-13 04:54:51,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:54:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-13 04:54:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:54:51,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:51,379 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:51,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:54:51,379 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash 171415099, now seen corresponding path program 14 times [2020-10-13 04:54:51,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:51,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137270942] [2020-10-13 04:54:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:53,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:54:53,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-13 04:54:53,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:54:53,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:54:53,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:54:53,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:53,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:53,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:53,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:53,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:53,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:53,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:53,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:53,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:53,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:54:53,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137270942] [2020-10-13 04:54:53,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:53,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:54:53,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798195355] [2020-10-13 04:54:53,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:54:53,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:54:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:53,444 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 10 states. [2020-10-13 04:54:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:53,536 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-13 04:54:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:54:53,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-13 04:54:53,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:53,537 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:54:53,538 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:54:53,538 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 04:54:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:54:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-13 04:54:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 04:54:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-13 04:54:53,547 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 51 [2020-10-13 04:54:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:53,548 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-13 04:54:53,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:54:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-13 04:54:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:54:53,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:53,549 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:53,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:54:53,550 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash -363462543, now seen corresponding path program 15 times [2020-10-13 04:54:53,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:53,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189519962] [2020-10-13 04:54:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:55,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:55,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:54:55,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:55,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2150 [2020-10-13 04:54:55,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:54:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:54:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:55,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:55,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:55,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:55,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:55,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:55,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:55,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:54:55,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189519962] [2020-10-13 04:54:55,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:55,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:54:55,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518747606] [2020-10-13 04:54:55,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:54:55,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:55,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:54:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:54:55,827 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 13 states. [2020-10-13 04:54:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:55,916 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-13 04:54:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:54:55,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-13 04:54:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:55,917 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:54:55,917 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 04:54:55,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:54:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 04:54:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 04:54:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:54:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 04:54:55,923 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 54 [2020-10-13 04:54:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:55,923 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 04:54:55,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:54:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 04:54:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:54:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:55,924 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:55,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:54:55,924 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 433561107, now seen corresponding path program 16 times [2020-10-13 04:54:55,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:55,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790707120] [2020-10-13 04:54:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:55,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:55,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:58,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:54:58,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:58,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2292 [2020-10-13 04:54:58,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:58,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:54:58,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:58,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:54:58,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:58,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:58,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:58,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:58,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:58,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:58,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:58,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:54:58,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790707120] [2020-10-13 04:54:58,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:58,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:54:58,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902912161] [2020-10-13 04:54:58,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:54:58,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:54:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:54:58,409 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 14 states. [2020-10-13 04:54:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:58,503 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2020-10-13 04:54:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:54:58,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 04:54:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:58,504 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:54:58,504 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:54:58,505 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 04:54:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:54:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 04:54:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 04:54:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-13 04:54:58,513 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 56 [2020-10-13 04:54:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:58,514 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-13 04:54:58,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:54:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-13 04:54:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:54:58,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:58,515 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:58,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:54:58,515 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1869110069, now seen corresponding path program 17 times [2020-10-13 04:54:58,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:58,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936085878] [2020-10-13 04:54:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:00,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:00,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:55:00,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:00,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2217 [2020-10-13 04:55:00,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:55:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:55:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:55:00,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:00,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:00,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:00,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:00,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:00,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:55:00,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:00,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:55:00,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936085878] [2020-10-13 04:55:00,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:00,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:55:00,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840110195] [2020-10-13 04:55:00,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:55:00,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:55:00,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:55:00,843 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 11 states. [2020-10-13 04:55:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:00,956 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-13 04:55:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:55:00,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-13 04:55:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:00,958 INFO L225 Difference]: With dead ends: 79 [2020-10-13 04:55:00,958 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 04:55:00,959 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 04:55:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 04:55:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-13 04:55:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:55:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-13 04:55:00,962 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 58 [2020-10-13 04:55:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:00,962 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-13 04:55:00,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:55:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-13 04:55:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:55:00,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:00,963 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:00,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:55:00,964 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1867488969, now seen corresponding path program 18 times [2020-10-13 04:55:00,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:00,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061327095] [2020-10-13 04:55:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:01,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:04,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:55:04,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3471 [2020-10-13 04:55:04,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:55:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:55:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:04,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:04,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:04,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:04,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:04,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:04,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:55:04,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061327095] [2020-10-13 04:55:04,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:04,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:55:04,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914249406] [2020-10-13 04:55:04,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:55:04,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:55:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:04,643 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 15 states. [2020-10-13 04:55:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:04,748 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-13 04:55:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:55:04,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-13 04:55:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:04,750 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:55:04,750 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:55:04,751 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 04:55:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:55:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:55:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:55:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 04:55:04,760 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 61 [2020-10-13 04:55:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:04,760 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 04:55:04,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:55:04,761 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 04:55:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:55:04,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:04,762 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:04,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:55:04,762 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:04,763 INFO L82 PathProgramCache]: Analyzing trace with hash -216889003, now seen corresponding path program 19 times [2020-10-13 04:55:04,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:04,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872977783] [2020-10-13 04:55:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:04,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:07,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:55:07,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:07,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2404 [2020-10-13 04:55:07,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:55:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:55:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:55:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:07,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:07,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:07,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:07,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:07,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:07,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:07,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:55:07,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872977783] [2020-10-13 04:55:07,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:07,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:55:07,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308988818] [2020-10-13 04:55:07,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:55:07,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:55:07,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:55:07,292 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 12 states. [2020-10-13 04:55:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:07,398 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-13 04:55:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:55:07,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-13 04:55:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:07,401 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:55:07,401 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:55:07,401 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 04:55:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:55:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-13 04:55:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:55:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-13 04:55:07,407 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 63 [2020-10-13 04:55:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:07,407 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-13 04:55:07,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:55:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-13 04:55:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:55:07,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:07,408 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:07,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:55:07,408 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1984037097, now seen corresponding path program 20 times [2020-10-13 04:55:07,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:07,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305472015] [2020-10-13 04:55:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:10,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2677 [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:55:10,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:10,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:10,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:10,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:10,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:10,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:10,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:10,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:10,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:55:10,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305472015] [2020-10-13 04:55:10,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:10,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:55:10,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740213173] [2020-10-13 04:55:10,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:55:10,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:10,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:55:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:10,260 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 16 states. [2020-10-13 04:55:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:10,402 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-13 04:55:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:55:10,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 04:55:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:10,404 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:55:10,404 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 04:55:10,405 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 04:55:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 04:55:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 04:55:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 04:55:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-13 04:55:10,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 66 [2020-10-13 04:55:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:10,408 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-13 04:55:10,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:55:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-13 04:55:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:55:10,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:10,409 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:10,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:55:10,410 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:10,410 INFO L82 PathProgramCache]: Analyzing trace with hash -911853127, now seen corresponding path program 21 times [2020-10-13 04:55:10,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:10,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141410357] [2020-10-13 04:55:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:10,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:10,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:13,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:55:13,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3056 [2020-10-13 04:55:13,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:55:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:55:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:13,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:13,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:13,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:13,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:13,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:13,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:55:13,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141410357] [2020-10-13 04:55:13,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:13,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:55:13,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662109942] [2020-10-13 04:55:13,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:55:13,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:55:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:13,639 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 17 states. [2020-10-13 04:55:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:13,779 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-13 04:55:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:55:13,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 04:55:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:13,780 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:55:13,780 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:55:13,781 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 04:55:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:55:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 04:55:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:55:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-13 04:55:13,786 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 68 [2020-10-13 04:55:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:13,787 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-13 04:55:13,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:55:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-13 04:55:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:55:13,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:13,788 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:13,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:55:13,790 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1335208997, now seen corresponding path program 22 times [2020-10-13 04:55:13,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:13,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026725544] [2020-10-13 04:55:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:13,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3607 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:55:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:17,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:55:17,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026725544] [2020-10-13 04:55:17,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:17,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:55:17,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955951739] [2020-10-13 04:55:17,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:55:17,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:55:17,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:17,521 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 13 states. [2020-10-13 04:55:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:17,650 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-13 04:55:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:55:17,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-13 04:55:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:17,653 INFO L225 Difference]: With dead ends: 91 [2020-10-13 04:55:17,653 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:55:17,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:55:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-13 04:55:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:55:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-13 04:55:17,657 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 70 [2020-10-13 04:55:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:17,658 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-13 04:55:17,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:55:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-13 04:55:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:55:17,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:17,659 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:17,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:55:17,659 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1793663279, now seen corresponding path program 23 times [2020-10-13 04:55:17,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:17,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214774610] [2020-10-13 04:55:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:22,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4436 [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:55:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:22,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:22,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:22,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:22,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:22,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:22,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:22,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:55:22,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214774610] [2020-10-13 04:55:22,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:22,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:55:22,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329039239] [2020-10-13 04:55:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:55:22,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:55:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:22,289 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 18 states. [2020-10-13 04:55:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:22,428 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2020-10-13 04:55:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:55:22,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-13 04:55:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:22,429 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:55:22,430 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:55:22,430 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 04:55:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:55:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:55:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:55:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-13 04:55:22,434 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 73 [2020-10-13 04:55:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:22,434 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-13 04:55:22,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:55:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-13 04:55:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:55:22,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:22,435 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:22,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:55:22,436 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash -522728977, now seen corresponding path program 24 times [2020-10-13 04:55:22,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:22,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245739801] [2020-10-13 04:55:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:22,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:22,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:27,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:27,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:55:27,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4780 [2020-10-13 04:55:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:55:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:55:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:55:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:27,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:27,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:27,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:27,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:27,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:27,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:27,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:27,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:27,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:27,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:55:27,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245739801] [2020-10-13 04:55:27,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:27,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:55:27,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445188313] [2020-10-13 04:55:27,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:55:27,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:27,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:55:27,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:27,352 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 14 states. [2020-10-13 04:55:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:27,489 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-13 04:55:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:55:27,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-13 04:55:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:27,491 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:55:27,491 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:55:27,491 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 04:55:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:55:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-13 04:55:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:55:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-13 04:55:27,495 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 75 [2020-10-13 04:55:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:27,495 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-13 04:55:27,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:55:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-13 04:55:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:55:27,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:27,496 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:27,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:55:27,497 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 657899581, now seen corresponding path program 25 times [2020-10-13 04:55:27,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:27,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918133772] [2020-10-13 04:55:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:27,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:32,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:32,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:55:32,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:32,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:55:32,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:32,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:55:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:55:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:32,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:32,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:32,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:32,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:32,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:55:32,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918133772] [2020-10-13 04:55:32,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:32,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:55:32,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962619644] [2020-10-13 04:55:32,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:55:32,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:32,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:55:32,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:32,716 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 19 states. [2020-10-13 04:55:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:32,864 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-10-13 04:55:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:55:32,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-13 04:55:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:32,865 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:55:32,866 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 04:55:32,866 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 04:55:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 04:55:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 04:55:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:55:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-13 04:55:32,871 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 78 [2020-10-13 04:55:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:32,871 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-13 04:55:32,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:55:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-13 04:55:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:55:32,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:32,872 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:32,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:55:32,873 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1770133471, now seen corresponding path program 26 times [2020-10-13 04:55:32,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:32,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014534060] [2020-10-13 04:55:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:37,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:55:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:55:38,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014534060] [2020-10-13 04:55:38,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:38,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:55:38,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824887761] [2020-10-13 04:55:38,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:55:38,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:55:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:38,099 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 20 states. [2020-10-13 04:55:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:38,258 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-10-13 04:55:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:55:38,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-13 04:55:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:38,260 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:55:38,260 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:55:38,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:55:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 04:55:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:55:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-13 04:55:38,264 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 80 [2020-10-13 04:55:38,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:38,265 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-13 04:55:38,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:55:38,265 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-13 04:55:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:55:38,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:38,266 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:38,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:55:38,266 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1180045057, now seen corresponding path program 27 times [2020-10-13 04:55:38,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:38,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561404283] [2020-10-13 04:55:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:42,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:55:42,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3941 [2020-10-13 04:55:42,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:55:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:55:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:55:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:42,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:42,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 04:55:42,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561404283] [2020-10-13 04:55:42,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:42,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:55:42,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627595784] [2020-10-13 04:55:42,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:55:42,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:55:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:42,359 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 15 states. [2020-10-13 04:55:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:42,518 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2020-10-13 04:55:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:55:42,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-13 04:55:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:42,520 INFO L225 Difference]: With dead ends: 103 [2020-10-13 04:55:42,520 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 04:55:42,521 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 04:55:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 04:55:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-13 04:55:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:55:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-10-13 04:55:42,525 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 82 [2020-10-13 04:55:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:42,526 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-10-13 04:55:42,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:55:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-10-13 04:55:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:55:42,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:42,527 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:42,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:55:42,527 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash 140413419, now seen corresponding path program 28 times [2020-10-13 04:55:42,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:42,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387128160] [2020-10-13 04:55:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:42,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4374 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:55:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:47,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:47,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:47,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:47,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:47,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:47,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:55:47,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387128160] [2020-10-13 04:55:47,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:47,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:55:47,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236817721] [2020-10-13 04:55:47,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:55:47,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:47,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:55:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:55:47,159 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 21 states. [2020-10-13 04:55:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:47,279 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2020-10-13 04:55:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:55:47,279 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-13 04:55:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:47,280 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:55:47,280 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:55:47,281 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 04:55:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:55:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:55:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:55:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-10-13 04:55:47,285 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 85 [2020-10-13 04:55:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:47,286 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-10-13 04:55:47,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:55:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-10-13 04:55:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:55:47,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:47,287 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:47,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:55:47,287 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -294537207, now seen corresponding path program 29 times [2020-10-13 04:55:47,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:47,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353684292] [2020-10-13 04:55:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:47,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:52,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:55:52,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:52,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:55:52,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:52,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:55:52,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:55:52,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:55:52,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:52,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:52,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:55:52,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353684292] [2020-10-13 04:55:52,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:52,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:55:52,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116375779] [2020-10-13 04:55:52,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:55:52,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:52,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:55:52,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:52,463 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 16 states. [2020-10-13 04:55:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:52,611 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2020-10-13 04:55:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:55:52,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-13 04:55:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:52,612 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:55:52,612 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:55:52,612 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 04:55:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:55:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-13 04:55:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:55:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2020-10-13 04:55:52,617 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 87 [2020-10-13 04:55:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:52,617 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2020-10-13 04:55:52,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:55:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2020-10-13 04:55:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:55:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:52,618 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:52,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:55:52,619 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash -214309917, now seen corresponding path program 30 times [2020-10-13 04:55:52,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:52,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895366414] [2020-10-13 04:55:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:52,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:57,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:55:57,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:57,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:57,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:55:57,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895366414] [2020-10-13 04:55:57,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:57,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:55:57,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677884584] [2020-10-13 04:55:57,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:55:57,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:57,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:55:57,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:55:57,891 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand 22 states. [2020-10-13 04:55:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:58,074 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2020-10-13 04:55:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:55:58,075 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-13 04:55:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:58,076 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:55:58,076 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 04:55:58,077 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 04:55:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 04:55:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 04:55:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:55:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2020-10-13 04:55:58,082 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 90 [2020-10-13 04:55:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:58,082 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2020-10-13 04:55:58,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:55:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2020-10-13 04:55:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:55:58,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:58,084 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:58,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:55:58,084 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1826301819, now seen corresponding path program 31 times [2020-10-13 04:55:58,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:58,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621729908] [2020-10-13 04:55:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:03,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:56:03,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:03,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:56:03,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:56:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:56:03,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:03,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:03,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:03,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:03,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:56:03,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621729908] [2020-10-13 04:56:03,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:03,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:56:03,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529892371] [2020-10-13 04:56:03,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:56:03,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:56:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:56:03,406 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand 23 states. [2020-10-13 04:56:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:03,542 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2020-10-13 04:56:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:56:03,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-13 04:56:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:03,544 INFO L225 Difference]: With dead ends: 152 [2020-10-13 04:56:03,544 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:56:03,545 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 04:56:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:56:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 04:56:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 04:56:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-13 04:56:03,549 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 92 [2020-10-13 04:56:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:03,549 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-13 04:56:03,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:56:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-13 04:56:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:56:03,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:03,551 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:03,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:56:03,551 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash -467325785, now seen corresponding path program 32 times [2020-10-13 04:56:03,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:03,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458537199] [2020-10-13 04:56:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:08,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:08,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:56:08,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:56:08,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:08,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:08,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:08,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:08,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:08,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:08,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:08,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 04:56:08,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458537199] [2020-10-13 04:56:08,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:08,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:56:08,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296888845] [2020-10-13 04:56:08,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:56:08,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:08,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:56:08,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:56:08,730 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 17 states. [2020-10-13 04:56:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:08,889 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-13 04:56:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:56:08,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-10-13 04:56:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:08,892 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:56:08,892 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:56:08,893 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 04:56:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:56:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 04:56:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:56:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-10-13 04:56:08,898 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 94 [2020-10-13 04:56:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:08,898 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-10-13 04:56:08,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:56:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-10-13 04:56:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:56:08,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:08,900 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:08,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:56:08,900 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1906950789, now seen corresponding path program 33 times [2020-10-13 04:56:08,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:08,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240687194] [2020-10-13 04:56:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:56:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:13,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:56:13,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:14,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:14,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:14,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:14,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:56:14,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240687194] [2020-10-13 04:56:14,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:14,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:56:14,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705201985] [2020-10-13 04:56:14,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:56:14,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:56:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:14,245 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 24 states. [2020-10-13 04:56:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:14,392 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-10-13 04:56:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:56:14,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-13 04:56:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:14,393 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:56:14,393 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:56:14,394 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 04:56:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:56:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:56:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:56:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-10-13 04:56:14,399 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 97 [2020-10-13 04:56:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:14,400 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-10-13 04:56:14,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:56:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-10-13 04:56:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:56:14,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:14,401 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:14,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:56:14,401 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1371714467, now seen corresponding path program 34 times [2020-10-13 04:56:14,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:14,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521972455] [2020-10-13 04:56:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:14,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:19,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:56:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:56:19,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:19,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:19,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:19,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:19,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:19,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:19,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:19,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:56:19,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521972455] [2020-10-13 04:56:19,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:19,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:56:19,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626353682] [2020-10-13 04:56:19,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:56:19,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:56:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:56:19,598 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 18 states. [2020-10-13 04:56:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:19,765 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2020-10-13 04:56:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:56:19,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-13 04:56:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:19,767 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:56:19,767 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:56:19,768 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 04:56:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:56:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-13 04:56:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 04:56:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2020-10-13 04:56:19,774 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 99 [2020-10-13 04:56:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:19,774 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2020-10-13 04:56:19,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:56:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2020-10-13 04:56:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:56:19,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:19,775 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:19,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:56:19,776 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2142696951, now seen corresponding path program 35 times [2020-10-13 04:56:19,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:19,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064074084] [2020-10-13 04:56:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:56:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:25,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:25,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:25,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:56:25,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064074084] [2020-10-13 04:56:25,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:25,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:56:25,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896385973] [2020-10-13 04:56:25,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:56:25,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:56:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:25,135 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand 25 states. [2020-10-13 04:56:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:25,297 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2020-10-13 04:56:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:56:25,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 102 [2020-10-13 04:56:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:25,299 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:56:25,299 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 04:56:25,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 04:56:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 04:56:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:56:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2020-10-13 04:56:25,305 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 102 [2020-10-13 04:56:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:25,305 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2020-10-13 04:56:25,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:56:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2020-10-13 04:56:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:56:25,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:25,306 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:25,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:56:25,307 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1649417131, now seen corresponding path program 36 times [2020-10-13 04:56:25,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:25,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913378583] [2020-10-13 04:56:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:25,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:30,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:56:30,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:30,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:56:30,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:30,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:56:30,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:30,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:56:30,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:30,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:30,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:30,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:30,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:30,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:30,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:30,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:56:30,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913378583] [2020-10-13 04:56:30,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:30,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:56:30,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033367810] [2020-10-13 04:56:30,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:56:30,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:56:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:30,657 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 26 states. [2020-10-13 04:56:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:30,821 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2020-10-13 04:56:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:56:30,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-13 04:56:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:30,823 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:56:30,823 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:56:30,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:56:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 04:56:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:56:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-10-13 04:56:30,829 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 104 [2020-10-13 04:56:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:30,829 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-10-13 04:56:30,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:56:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-10-13 04:56:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:56:30,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:30,831 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:30,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:56:30,831 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash -556184371, now seen corresponding path program 37 times [2020-10-13 04:56:30,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:30,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864491593] [2020-10-13 04:56:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:30,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:35,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:35,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:56:35,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:35,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:56:35,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:56:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:56:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:56:35,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:36,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:36,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:36,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:36,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:36,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:36,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:36,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:36,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:56:36,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864491593] [2020-10-13 04:56:36,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:36,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:56:36,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369010480] [2020-10-13 04:56:36,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:56:36,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:56:36,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:56:36,047 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 19 states. [2020-10-13 04:56:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:36,231 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-13 04:56:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:56:36,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2020-10-13 04:56:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:36,233 INFO L225 Difference]: With dead ends: 127 [2020-10-13 04:56:36,233 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:56:36,234 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 04:56:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:56:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-13 04:56:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:56:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-10-13 04:56:36,237 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 106 [2020-10-13 04:56:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:36,238 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-10-13 04:56:36,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:56:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-10-13 04:56:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:56:36,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:36,240 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:36,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:56:36,240 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash 420669599, now seen corresponding path program 38 times [2020-10-13 04:56:36,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:36,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431719861] [2020-10-13 04:56:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:36,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:41,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:41,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:56:41,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:41,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:56:41,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:56:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:56:41,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:41,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:41,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:56:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431719861] [2020-10-13 04:56:41,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:41,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:56:41,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716400203] [2020-10-13 04:56:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:56:41,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:56:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:41,643 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 27 states. [2020-10-13 04:56:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:41,753 INFO L93 Difference]: Finished difference Result 178 states and 214 transitions. [2020-10-13 04:56:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:56:41,753 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-13 04:56:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:41,754 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:56:41,754 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 04:56:41,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 04:56:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 04:56:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:56:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-13 04:56:41,759 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 109 [2020-10-13 04:56:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:41,760 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-13 04:56:41,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:56:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-13 04:56:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:56:41,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:41,761 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:41,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:56:41,761 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash -509272899, now seen corresponding path program 39 times [2020-10-13 04:56:41,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:41,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878348925] [2020-10-13 04:56:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:42,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:46,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:46,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:56:46,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:46,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:46,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:46,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:46,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:46,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:46,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:46,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:46,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:46,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:46,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:46,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:56:47,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878348925] [2020-10-13 04:56:47,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:47,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:56:47,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407489921] [2020-10-13 04:56:47,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:56:47,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:56:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:56:47,008 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 20 states. [2020-10-13 04:56:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:47,185 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-13 04:56:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:56:47,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-10-13 04:56:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:47,187 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:56:47,187 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:56:47,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:56:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:56:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-13 04:56:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:56:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2020-10-13 04:56:47,195 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 111 [2020-10-13 04:56:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:47,195 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2020-10-13 04:56:47,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:56:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2020-10-13 04:56:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:56:47,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:47,197 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:47,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:56:47,197 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:47,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2095960751, now seen corresponding path program 40 times [2020-10-13 04:56:47,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:47,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170564173] [2020-10-13 04:56:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:56:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:56:52,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:52,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:52,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:52,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:52,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:56:52,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:56:52,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170564173] [2020-10-13 04:56:52,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:52,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:56:52,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721026254] [2020-10-13 04:56:52,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:56:52,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:56:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:52,732 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 28 states. [2020-10-13 04:56:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:52,923 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2020-10-13 04:56:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:56:52,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 114 [2020-10-13 04:56:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:52,924 INFO L225 Difference]: With dead ends: 186 [2020-10-13 04:56:52,925 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 04:56:52,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 04:56:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-13 04:56:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:56:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-10-13 04:56:52,931 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 114 [2020-10-13 04:56:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:52,931 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-10-13 04:56:52,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:56:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-10-13 04:56:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:56:52,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:52,932 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:52,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:56:52,932 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 785219921, now seen corresponding path program 41 times [2020-10-13 04:56:52,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:52,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415977121] [2020-10-13 04:56:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:52,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:57,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:57,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:56:57,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:56:57,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:56:57,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:56:57,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:57,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:56:57,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:58,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:58,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:58,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:56:58,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415977121] [2020-10-13 04:56:58,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:58,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:56:58,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852615970] [2020-10-13 04:56:58,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:56:58,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:56:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:58,380 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 29 states. [2020-10-13 04:56:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:58,506 INFO L93 Difference]: Finished difference Result 188 states and 226 transitions. [2020-10-13 04:56:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:56:58,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-13 04:56:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:58,508 INFO L225 Difference]: With dead ends: 188 [2020-10-13 04:56:58,508 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:56:58,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:56:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-13 04:56:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:56:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-10-13 04:56:58,515 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 116 [2020-10-13 04:56:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:58,515 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-10-13 04:56:58,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:56:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-10-13 04:56:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 04:56:58,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:58,516 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:58,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:56:58,516 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -411299981, now seen corresponding path program 42 times [2020-10-13 04:56:58,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:58,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036239707] [2020-10-13 04:56:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:03,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 04:57:03,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:03,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:03,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:03,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:03,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:03,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:03,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:03,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:03,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:03,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:57:03,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036239707] [2020-10-13 04:57:03,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:03,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:57:03,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411161553] [2020-10-13 04:57:03,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:57:03,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:57:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:57:03,789 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 21 states. [2020-10-13 04:57:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:03,982 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2020-10-13 04:57:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:57:03,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 118 [2020-10-13 04:57:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:03,984 INFO L225 Difference]: With dead ends: 139 [2020-10-13 04:57:03,985 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:57:03,985 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 04:57:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:57:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-13 04:57:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:57:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2020-10-13 04:57:03,991 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 118 [2020-10-13 04:57:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:03,991 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2020-10-13 04:57:03,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:57:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2020-10-13 04:57:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:57:03,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:03,992 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:03,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:57:03,993 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash 229399609, now seen corresponding path program 43 times [2020-10-13 04:57:03,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:03,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510187564] [2020-10-13 04:57:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:09,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:09,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:57:09,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:09,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:57:09,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:57:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:57:09,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:09,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:09,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:57:09,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510187564] [2020-10-13 04:57:09,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:09,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:57:09,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327149553] [2020-10-13 04:57:09,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:57:09,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:09,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:57:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:57:09,469 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 30 states. [2020-10-13 04:57:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:09,689 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2020-10-13 04:57:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:57:09,690 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2020-10-13 04:57:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:09,691 INFO L225 Difference]: With dead ends: 196 [2020-10-13 04:57:09,691 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:57:09,693 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 04:57:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:57:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 04:57:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:57:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2020-10-13 04:57:09,698 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 121 [2020-10-13 04:57:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:09,698 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2020-10-13 04:57:09,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:57:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2020-10-13 04:57:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:57:09,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:09,699 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:09,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:57:09,700 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash 468407127, now seen corresponding path program 44 times [2020-10-13 04:57:09,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:09,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268050286] [2020-10-13 04:57:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:09,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:57:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:57:14,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:14,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:14,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:14,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:14,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:14,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:14,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 04:57:14,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268050286] [2020-10-13 04:57:14,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:14,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:57:14,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077567223] [2020-10-13 04:57:14,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:57:14,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:57:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:57:14,985 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand 22 states. [2020-10-13 04:57:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:15,112 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-13 04:57:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:57:15,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2020-10-13 04:57:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:15,115 INFO L225 Difference]: With dead ends: 144 [2020-10-13 04:57:15,115 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:57:15,115 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 04:57:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:57:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-13 04:57:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 04:57:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-13 04:57:15,121 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 123 [2020-10-13 04:57:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:15,121 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-13 04:57:15,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:57:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-13 04:57:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:57:15,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:15,122 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:15,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:57:15,122 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -306586155, now seen corresponding path program 45 times [2020-10-13 04:57:15,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:15,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396803631] [2020-10-13 04:57:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:16,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:20,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:57:20,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:20,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:57:20,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:20,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:57:20,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:20,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:57:20,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:20,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:20,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:20,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:20,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:20,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:20,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:57:20,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396803631] [2020-10-13 04:57:20,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:20,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:57:20,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485630398] [2020-10-13 04:57:20,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:57:20,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:20,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:57:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:57:20,661 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 31 states. [2020-10-13 04:57:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:20,879 INFO L93 Difference]: Finished difference Result 204 states and 246 transitions. [2020-10-13 04:57:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:57:20,880 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 126 [2020-10-13 04:57:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:20,882 INFO L225 Difference]: With dead ends: 204 [2020-10-13 04:57:20,882 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 04:57:20,884 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 04:57:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 04:57:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 04:57:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:57:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2020-10-13 04:57:20,889 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 126 [2020-10-13 04:57:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:20,890 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2020-10-13 04:57:20,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:57:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2020-10-13 04:57:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:57:20,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:20,891 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:20,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:57:20,891 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -965826185, now seen corresponding path program 46 times [2020-10-13 04:57:20,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:20,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283097808] [2020-10-13 04:57:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:22,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:25,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:25,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:57:25,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:25,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:57:25,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:57:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:57:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:26,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:26,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:26,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:26,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:26,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:26,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:57:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:57:26,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283097808] [2020-10-13 04:57:26,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:26,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:57:26,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536669008] [2020-10-13 04:57:26,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:57:26,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:57:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:26,482 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 32 states. [2020-10-13 04:57:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:26,727 INFO L93 Difference]: Finished difference Result 206 states and 248 transitions. [2020-10-13 04:57:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:57:26,728 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-13 04:57:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:26,729 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:57:26,729 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:57:26,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:57:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-13 04:57:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 04:57:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2020-10-13 04:57:26,737 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 128 [2020-10-13 04:57:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:26,738 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2020-10-13 04:57:26,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:57:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2020-10-13 04:57:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 04:57:26,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:26,739 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:26,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:57:26,740 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1159664793, now seen corresponding path program 47 times [2020-10-13 04:57:26,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:26,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56624603] [2020-10-13 04:57:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:31,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:31,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 04:57:31,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:31,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:57:31,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:31,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:57:31,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:57:31,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 04:57:31,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:32,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:32,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:32,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:32,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:32,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:32,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 04:57:32,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56624603] [2020-10-13 04:57:32,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:32,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:57:32,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802487216] [2020-10-13 04:57:32,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:57:32,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:32,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:57:32,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:57:32,047 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand 23 states. [2020-10-13 04:57:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:32,222 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2020-10-13 04:57:32,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:57:32,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2020-10-13 04:57:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:32,224 INFO L225 Difference]: With dead ends: 151 [2020-10-13 04:57:32,224 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:57:32,224 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 04:57:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:57:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-13 04:57:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:57:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-10-13 04:57:32,229 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 130 [2020-10-13 04:57:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:32,229 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-10-13 04:57:32,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:57:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-10-13 04:57:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 04:57:32,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:32,231 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:32,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:57:32,232 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1417642669, now seen corresponding path program 48 times [2020-10-13 04:57:32,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:32,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585717491] [2020-10-13 04:57:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:32,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:34,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:37,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:37,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 04:57:37,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:37,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:57:37,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:37,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:57:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:57:37,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:37,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:37,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:37,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:57:37,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585717491] [2020-10-13 04:57:37,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:37,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:57:37,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931574598] [2020-10-13 04:57:37,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:57:37,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:57:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:57:37,821 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 33 states. [2020-10-13 04:57:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:38,047 INFO L93 Difference]: Finished difference Result 214 states and 258 transitions. [2020-10-13 04:57:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:57:38,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 133 [2020-10-13 04:57:38,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:38,049 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:57:38,049 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 04:57:38,050 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 04:57:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 04:57:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 04:57:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:57:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-13 04:57:38,055 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 133 [2020-10-13 04:57:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:38,055 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-13 04:57:38,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:57:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-13 04:57:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 04:57:38,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:38,056 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:38,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:57:38,057 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1419790479, now seen corresponding path program 49 times [2020-10-13 04:57:38,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:38,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398554261] [2020-10-13 04:57:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:38,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 04:57:43,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:43,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:57:43,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:57:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:57:43,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:43,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:43,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:43,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:43,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:43,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:57:43,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398554261] [2020-10-13 04:57:43,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:43,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:57:43,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717489042] [2020-10-13 04:57:43,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:57:43,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:43,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:57:43,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:43,670 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 34 states. [2020-10-13 04:57:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:43,900 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2020-10-13 04:57:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:57:43,900 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 135 [2020-10-13 04:57:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:43,901 INFO L225 Difference]: With dead ends: 216 [2020-10-13 04:57:43,902 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:57:43,904 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 04:57:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:57:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-13 04:57:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:57:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2020-10-13 04:57:43,909 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 135 [2020-10-13 04:57:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:43,909 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2020-10-13 04:57:43,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:57:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2020-10-13 04:57:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:57:43,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:43,911 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:43,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:57:43,911 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash 811131407, now seen corresponding path program 50 times [2020-10-13 04:57:43,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:43,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509148414] [2020-10-13 04:57:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:43,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:48,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:57:48,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:49,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:49,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:49,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:49,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 04:57:49,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509148414] [2020-10-13 04:57:49,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:49,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:57:49,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344896892] [2020-10-13 04:57:49,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:57:49,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:49,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:57:49,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:57:49,292 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand 24 states. [2020-10-13 04:57:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:49,515 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2020-10-13 04:57:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:57:49,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2020-10-13 04:57:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:49,517 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:57:49,517 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 04:57:49,518 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 04:57:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 04:57:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-13 04:57:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:57:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-10-13 04:57:49,522 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 137 [2020-10-13 04:57:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:49,522 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-10-13 04:57:49,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:57:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-10-13 04:57:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:57:49,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:49,524 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:49,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:57:49,524 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:49,524 INFO L82 PathProgramCache]: Analyzing trace with hash 655176733, now seen corresponding path program 51 times [2020-10-13 04:57:49,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:49,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943325819] [2020-10-13 04:57:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:49,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:54,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:57:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:55,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:55,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:55,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:55,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:55,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:55,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:55,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 04:57:55,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943325819] [2020-10-13 04:57:55,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:55,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:57:55,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306890965] [2020-10-13 04:57:55,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:57:55,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:55,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:57:55,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:55,190 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 35 states. [2020-10-13 04:57:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:55,394 INFO L93 Difference]: Finished difference Result 224 states and 270 transitions. [2020-10-13 04:57:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:57:55,395 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-13 04:57:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:55,396 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:57:55,397 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:57:55,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:57:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-13 04:57:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:57:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2020-10-13 04:57:55,404 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 140 [2020-10-13 04:57:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:55,405 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2020-10-13 04:57:55,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:57:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2020-10-13 04:57:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:57:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:55,407 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:55,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:57:55,407 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:55,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185665, now seen corresponding path program 52 times [2020-10-13 04:57:55,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:55,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813308310] [2020-10-13 04:57:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:55,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:00,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:58:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 04:58:00,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:00,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:00,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:00,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:00,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:00,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:00,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:00,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:00,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:00,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:00,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:00,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 04:58:00,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813308310] [2020-10-13 04:58:00,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:00,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:58:00,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280129632] [2020-10-13 04:58:00,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:58:00,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:58:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:00,774 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand 25 states. [2020-10-13 04:58:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:00,966 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2020-10-13 04:58:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:58:00,966 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2020-10-13 04:58:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:00,968 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:58:00,968 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 04:58:00,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 04:58:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-13 04:58:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 04:58:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 174 transitions. [2020-10-13 04:58:00,973 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 174 transitions. Word has length 142 [2020-10-13 04:58:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:00,973 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 174 transitions. [2020-10-13 04:58:00,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:58:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 174 transitions. [2020-10-13 04:58:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 04:58:00,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:00,975 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:00,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:58:00,975 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1584288787, now seen corresponding path program 53 times [2020-10-13 04:58:00,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:00,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082561255] [2020-10-13 04:58:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:06,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:06,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 04:58:06,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:06,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:58:06,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:06,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:58:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:58:06,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:06,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:06,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:06,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:06,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 04:58:06,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082561255] [2020-10-13 04:58:06,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:06,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:58:06,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592983589] [2020-10-13 04:58:06,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:58:06,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:58:06,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:58:06,640 INFO L87 Difference]: Start difference. First operand 150 states and 174 transitions. Second operand 36 states. [2020-10-13 04:58:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:06,844 INFO L93 Difference]: Finished difference Result 232 states and 280 transitions. [2020-10-13 04:58:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:58:06,845 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2020-10-13 04:58:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:06,846 INFO L225 Difference]: With dead ends: 232 [2020-10-13 04:58:06,846 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 04:58:06,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:58:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 04:58:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-13 04:58:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:58:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2020-10-13 04:58:06,851 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 145 [2020-10-13 04:58:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:06,851 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2020-10-13 04:58:06,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:58:06,851 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2020-10-13 04:58:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:58:06,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:06,853 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:06,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 04:58:06,853 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1841604875, now seen corresponding path program 54 times [2020-10-13 04:58:06,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:06,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358626026] [2020-10-13 04:58:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:06,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:11,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:11,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:58:11,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:12,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:12,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:12,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:12,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:12,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:12,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:12,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 04:58:12,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358626026] [2020-10-13 04:58:12,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:12,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:58:12,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445319621] [2020-10-13 04:58:12,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:58:12,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:12,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:58:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:58:12,626 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand 37 states. [2020-10-13 04:58:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:12,860 INFO L93 Difference]: Finished difference Result 234 states and 282 transitions. [2020-10-13 04:58:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:58:12,860 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 147 [2020-10-13 04:58:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:12,862 INFO L225 Difference]: With dead ends: 234 [2020-10-13 04:58:12,862 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 04:58:12,863 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 04:58:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 04:58:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-13 04:58:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:58:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 178 transitions. [2020-10-13 04:58:12,867 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 178 transitions. Word has length 147 [2020-10-13 04:58:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:12,867 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 178 transitions. [2020-10-13 04:58:12,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:58:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 178 transitions. [2020-10-13 04:58:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:58:12,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:12,869 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:12,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 04:58:12,869 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash -114501975, now seen corresponding path program 55 times [2020-10-13 04:58:12,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:12,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286979276] [2020-10-13 04:58:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:58:17,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:18,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:18,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:18,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:18,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:18,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:18,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 04:58:18,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286979276] [2020-10-13 04:58:18,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:18,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:58:18,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743808156] [2020-10-13 04:58:18,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:58:18,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:58:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:58:18,328 INFO L87 Difference]: Start difference. First operand 154 states and 178 transitions. Second operand 26 states. [2020-10-13 04:58:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:18,562 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-13 04:58:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:58:18,563 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-10-13 04:58:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:18,565 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:58:18,565 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 04:58:18,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:58:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 04:58:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-13 04:58:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 04:58:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2020-10-13 04:58:18,576 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 149 [2020-10-13 04:58:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:18,576 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2020-10-13 04:58:18,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:58:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2020-10-13 04:58:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 04:58:18,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:18,577 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:18,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 04:58:18,578 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:18,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1198866109, now seen corresponding path program 56 times [2020-10-13 04:58:18,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:18,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301838984] [2020-10-13 04:58:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:23,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:58:23,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:24,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:24,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:24,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:24,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:24,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:24,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:24,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 04:58:24,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301838984] [2020-10-13 04:58:24,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:24,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:58:24,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025713977] [2020-10-13 04:58:24,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:58:24,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:58:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:58:24,383 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 38 states. [2020-10-13 04:58:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:24,581 INFO L93 Difference]: Finished difference Result 242 states and 292 transitions. [2020-10-13 04:58:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:58:24,581 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-13 04:58:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:24,582 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:58:24,582 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:58:24,582 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 04:58:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:58:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-13 04:58:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 04:58:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 184 transitions. [2020-10-13 04:58:24,589 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 184 transitions. Word has length 152 [2020-10-13 04:58:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:24,589 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 184 transitions. [2020-10-13 04:58:24,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:58:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 184 transitions. [2020-10-13 04:58:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 04:58:24,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:24,590 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:24,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 04:58:24,591 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash -439064987, now seen corresponding path program 57 times [2020-10-13 04:58:24,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:24,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96613231] [2020-10-13 04:58:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:26,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 04:58:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:58:29,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:30,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:30,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:30,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:30,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:30,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:30,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:30,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:30,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2007 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-13 04:58:30,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96613231] [2020-10-13 04:58:30,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:30,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:58:30,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078495141] [2020-10-13 04:58:30,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:58:30,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:58:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:58:30,074 INFO L87 Difference]: Start difference. First operand 159 states and 184 transitions. Second operand 27 states. [2020-10-13 04:58:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:30,325 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2020-10-13 04:58:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:58:30,326 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 154 [2020-10-13 04:58:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:30,327 INFO L225 Difference]: With dead ends: 175 [2020-10-13 04:58:30,327 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 04:58:30,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:58:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 04:58:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-13 04:58:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 04:58:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2020-10-13 04:58:30,333 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 154 [2020-10-13 04:58:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:30,334 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2020-10-13 04:58:30,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:58:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2020-10-13 04:58:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 04:58:30,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:30,335 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:30,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 04:58:30,335 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2010793991, now seen corresponding path program 58 times [2020-10-13 04:58:30,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:30,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598978308] [2020-10-13 04:58:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:32,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 04:58:35,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:35,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:58:35,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:58:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:58:35,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 04:58:36,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598978308] [2020-10-13 04:58:36,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:36,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:58:36,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369303310] [2020-10-13 04:58:36,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:58:36,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:36,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:58:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:58:36,199 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand 39 states. [2020-10-13 04:58:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:36,491 INFO L93 Difference]: Finished difference Result 250 states and 302 transitions. [2020-10-13 04:58:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:58:36,492 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 157 [2020-10-13 04:58:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:36,493 INFO L225 Difference]: With dead ends: 250 [2020-10-13 04:58:36,493 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 04:58:36,494 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 04:58:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 04:58:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-13 04:58:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 04:58:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2020-10-13 04:58:36,499 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 157 [2020-10-13 04:58:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:36,499 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2020-10-13 04:58:36,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:58:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2020-10-13 04:58:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 04:58:36,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:36,500 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:36,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 04:58:36,500 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -103512027, now seen corresponding path program 59 times [2020-10-13 04:58:36,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:36,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748312067] [2020-10-13 04:58:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:41,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:58:41,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:42,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:42,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:42,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:42,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:42,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:42,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 04:58:42,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748312067] [2020-10-13 04:58:42,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:42,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:58:42,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547828153] [2020-10-13 04:58:42,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:58:42,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:42,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:58:42,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:58:42,399 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand 40 states. [2020-10-13 04:58:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:42,621 INFO L93 Difference]: Finished difference Result 252 states and 304 transitions. [2020-10-13 04:58:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:58:42,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 159 [2020-10-13 04:58:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:42,623 INFO L225 Difference]: With dead ends: 252 [2020-10-13 04:58:42,623 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 04:58:42,624 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 04:58:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 04:58:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-13 04:58:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:58:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 192 transitions. [2020-10-13 04:58:42,629 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 192 transitions. Word has length 159 [2020-10-13 04:58:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:42,629 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 192 transitions. [2020-10-13 04:58:42,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:58:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 192 transitions. [2020-10-13 04:58:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 04:58:42,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:42,631 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:42,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 04:58:42,631 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash -432064317, now seen corresponding path program 60 times [2020-10-13 04:58:42,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:42,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045248788] [2020-10-13 04:58:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:42,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking...