/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_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:59:08,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:59:08,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:59:08,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:59:08,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:59:08,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:59:08,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:59:08,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:59:08,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:59:08,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:59:08,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:59:08,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:59:08,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:59:08,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:59:08,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:59:08,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:59:08,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:59:08,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:59:08,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:59:08,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:59:08,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:59:08,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:59:08,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:59:08,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:59:08,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:59:08,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:59:08,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:59:08,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:59:08,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:59:08,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:59:08,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:59:08,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:59:08,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:59:08,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:59:08,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:59:08,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:59:08,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:59:08,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:59:08,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:59:08,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:59:08,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:59:08,708 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 04:59:08,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:59:08,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:59:08,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:59:08,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:59:08,730 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:59:08,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:59:08,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:59:08,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:59:08,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:59:08,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:59:08,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:59:08,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:59:08,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:59:08,732 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:59:08,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:59:08,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:59:08,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:59:08,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:59:08,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:59:08,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:59:08,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:59:08,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:59:08,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:59:08,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:59:08,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:59:08,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:59:08,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:59:08,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:59:08,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:59:08,735 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 04:59:09,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:59:09,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:59:09,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:59:09,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:59:09,044 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:59:09,045 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2020-10-13 04:59:09,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afb9bd293/f18bc15e2b514f19a09dd2d767b2ce1d/FLAG899780cf8 [2020-10-13 04:59:09,510 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:59:09,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2020-10-13 04:59:09,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afb9bd293/f18bc15e2b514f19a09dd2d767b2ce1d/FLAG899780cf8 [2020-10-13 04:59:09,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afb9bd293/f18bc15e2b514f19a09dd2d767b2ce1d [2020-10-13 04:59:09,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:59:09,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:59:09,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:59:09,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:59:09,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:59:09,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:59:09" (1/1) ... [2020-10-13 04:59:09,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538d8bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:09, skipping insertion in model container [2020-10-13 04:59:09,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:59:09" (1/1) ... [2020-10-13 04:59:09,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:59:09,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:59:10,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:59:10,156 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:59:10,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:59:10,197 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:59:10,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10 WrapperNode [2020-10-13 04:59:10,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:59:10,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:59:10,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:59:10,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:59:10,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (1/1) ... [2020-10-13 04:59:10,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:59:10,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:59:10,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:59:10,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:59:10,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (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 04:59:10,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:59:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:59:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:59:10,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:59:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:59:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:59:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:59:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:59:10,586 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:59:10,586 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:59:10,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:59:10 BoogieIcfgContainer [2020-10-13 04:59:10,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:59:10,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:59:10,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:59:10,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:59:10,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:59:09" (1/3) ... [2020-10-13 04:59:10,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363658d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:59:10, skipping insertion in model container [2020-10-13 04:59:10,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:59:10" (2/3) ... [2020-10-13 04:59:10,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363658d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:59:10, skipping insertion in model container [2020-10-13 04:59:10,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:59:10" (3/3) ... [2020-10-13 04:59:10,597 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2020-10-13 04:59:10,607 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:59:10,614 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:59:10,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:59:10,647 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:59:10,647 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:59:10,647 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:59:10,647 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:59:10,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:59:10,648 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:59:10,648 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:59:10,648 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:59:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 04:59:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:59:10,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:10,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:10,669 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-13 04:59:10,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:10,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394050872] [2020-10-13 04:59:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:10,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:10,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:10,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:10,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:59:10,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:10,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-13 04:59:10,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:59:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:59:11,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:11,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:11,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:59:11,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:11,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:11,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:11,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:11,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:59:11,090 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 04:59:11,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394050872] [2020-10-13 04:59:11,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:59:11,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:59:11,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105299557] [2020-10-13 04:59:11,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:59:11,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:11,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:59:11,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:59:11,119 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 04:59:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:11,212 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 04:59:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:59:11,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 04:59:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:11,224 INFO L225 Difference]: With dead ends: 41 [2020-10-13 04:59:11,224 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 04:59:11,228 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 04:59:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 04:59:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 04:59:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 04:59:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 04:59:11,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 04:59:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:11,271 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 04:59:11,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:59:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 04:59:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:59:11,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:11,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:11,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:59:11,273 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2020-10-13 04:59:11,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:11,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112122184] [2020-10-13 04:59:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:11,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:59:11,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:59:11,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 04:59:11,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:11,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:59:11,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:11,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:59:11,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:11,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:11,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:11,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:11,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:59:11,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:11,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:11,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:11,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:11,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:11,521 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 04:59:11,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112122184] [2020-10-13 04:59:11,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:59:11,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:59:11,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435116274] [2020-10-13 04:59:11,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:59:11,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:11,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:59:11,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:59:11,525 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 04:59:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:11,597 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-13 04:59:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:59:11,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 04:59:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:11,601 INFO L225 Difference]: With dead ends: 36 [2020-10-13 04:59:11,601 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:59:11,602 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 04:59:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:59:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 04:59:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 04:59:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 04:59:11,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-13 04:59:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:11,614 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 04:59:11,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:59:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 04:59:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:59:11,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:11,616 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 04:59:11,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:59:11,616 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-13 04:59:11,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:11,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863154461] [2020-10-13 04:59:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:11,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:59:12,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:12,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-13 04:59:12,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:59:12,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:59:12,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:59:12,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:12,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:12,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:12,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:12,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:12,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:12,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,221 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 04:59:12,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863154461] [2020-10-13 04:59:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:59:12,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822381074] [2020-10-13 04:59:12,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:59:12,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:59:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:59:12,224 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 04:59:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:12,303 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-13 04:59:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:59:12,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 04:59:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:12,305 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:59:12,305 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:59:12,306 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 04:59:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:59:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 04:59:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:59:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 04:59:12,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-13 04:59:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:12,313 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 04:59:12,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:59:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 04:59:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:59:12,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:12,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:12,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:59:12,315 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -406079354, now seen corresponding path program 2 times [2020-10-13 04:59:12,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:12,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681785260] [2020-10-13 04:59:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:59:12,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:12,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-13 04:59:12,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:59:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:59:12,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:59:12,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:59:12,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:12,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:12,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 04:59:12,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681785260] [2020-10-13 04:59:12,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:12,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:59:12,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365526332] [2020-10-13 04:59:12,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:59:12,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:59:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:59:12,756 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 04:59:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:12,844 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 04:59:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:59:12,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 04:59:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:12,846 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:59:12,846 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:59:12,847 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 04:59:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:59:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 04:59:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:59:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 04:59:12,854 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-13 04:59:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:12,854 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 04:59:12,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:59:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 04:59:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:59:12,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:12,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:12,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:59:12,856 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash -820912923, now seen corresponding path program 3 times [2020-10-13 04:59:12,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:12,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564287115] [2020-10-13 04:59:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:13,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:59:13,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:13,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-13 04:59:13,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:59:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:59:13,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:13,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:13,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:13,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:13,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:13,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:59:13,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:13,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:13,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:13,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:13,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:59:13,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564287115] [2020-10-13 04:59:13,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:13,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:59:13,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468705446] [2020-10-13 04:59:13,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:59:13,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:59:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:59:13,604 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 04:59:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:13,754 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 04:59:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:59:13,756 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 04:59:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:13,757 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:59:13,759 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:59:13,759 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 04:59:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:59:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-13 04:59:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:59:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 04:59:13,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-13 04:59:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:13,776 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 04:59:13,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:59:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 04:59:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:59:13,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:13,778 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:13,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:59:13,779 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1912151398, now seen corresponding path program 4 times [2020-10-13 04:59:13,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:13,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142628724] [2020-10-13 04:59:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:15,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:15,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:59:15,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:15,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-13 04:59:15,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:59:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:15,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:59:15,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:15,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:15,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:15,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:15,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:15,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:15,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:15,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 04:59:15,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142628724] [2020-10-13 04:59:15,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:15,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:59:15,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872833599] [2020-10-13 04:59:15,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:59:15,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:59:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:59:15,243 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 04:59:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:15,402 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-13 04:59:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:59:15,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 04:59:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:15,404 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:59:15,404 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:59:15,404 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 04:59:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:59:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-13 04:59:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:59:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 04:59:15,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-13 04:59:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:15,415 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 04:59:15,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:59:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 04:59:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:59:15,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:15,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:15,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:59:15,416 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash 378570245, now seen corresponding path program 5 times [2020-10-13 04:59:15,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:15,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441873301] [2020-10-13 04:59:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:15,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:16,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:17,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:17,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:59:17,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1824 [2020-10-13 04:59:17,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:17,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:59:17,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 04:59:17,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:59:17,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:17,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:17,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:17,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:17,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:17,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:59:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441873301] [2020-10-13 04:59:17,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:17,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:59:17,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490432833] [2020-10-13 04:59:17,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:59:17,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:59:17,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:59:17,321 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-13 04:59:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:17,467 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 04:59:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:59:17,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 04:59:17,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:17,469 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:59:17,469 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:59:17,469 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 04:59:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:59:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-10-13 04:59:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 04:59:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 04:59:17,476 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-13 04:59:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:17,476 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 04:59:17,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:59:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 04:59:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:59:17,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:17,478 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:17,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:59:17,478 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1539667386, now seen corresponding path program 6 times [2020-10-13 04:59:17,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:17,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306187052] [2020-10-13 04:59:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:17,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:19,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:19,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:59:19,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:19,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2157 [2020-10-13 04:59:19,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:19,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:59:19,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:19,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:59:19,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:19,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:19,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:19,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:19,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:19,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 04:59:19,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306187052] [2020-10-13 04:59:19,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:19,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:59:19,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171983217] [2020-10-13 04:59:19,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:59:19,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:59:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:59:19,732 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-13 04:59:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:19,933 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-13 04:59:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:59:19,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 04:59:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:19,935 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:59:19,935 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 04:59:19,936 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 04:59:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 04:59:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-10-13 04:59:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:59:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 04:59:19,946 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-13 04:59:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:19,946 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 04:59:19,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:59:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 04:59:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:59:19,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:19,948 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:19,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:59:19,950 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash -411883739, now seen corresponding path program 7 times [2020-10-13 04:59:19,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:19,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224728942] [2020-10-13 04:59:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:19,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:22,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:22,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:59:22,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:22,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2688 [2020-10-13 04:59:22,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:59:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:59:22,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:22,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:22,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:59:22,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:22,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:22,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:59:22,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224728942] [2020-10-13 04:59:22,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:22,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:59:22,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528438529] [2020-10-13 04:59:22,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:59:22,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:59:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:59:22,758 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-13 04:59:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:22,940 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-13 04:59:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:59:22,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-13 04:59:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:22,942 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:59:22,943 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:59:22,943 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 04:59:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:59:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-10-13 04:59:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:59:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 04:59:22,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-13 04:59:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:22,952 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 04:59:22,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:59:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 04:59:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:59:22,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:22,956 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:22,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:59:22,957 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash -959578330, now seen corresponding path program 8 times [2020-10-13 04:59:22,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:22,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216213162] [2020-10-13 04:59:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:22,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:26,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:26,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:59:26,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:26,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3315 [2020-10-13 04:59:26,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:26,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:59:26,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:59:26,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:59:26,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:26,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:26,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:26,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:26,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:26,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:26,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:26,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:26,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:59:26,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216213162] [2020-10-13 04:59:26,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:26,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:59:26,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942277782] [2020-10-13 04:59:26,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:59:26,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:59:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:59:26,393 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-13 04:59:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:26,564 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 04:59:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:59:26,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 04:59:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:26,565 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:59:26,566 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:59:26,566 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 04:59:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:59:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-13 04:59:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:59:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 04:59:26,573 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-13 04:59:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:26,573 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 04:59:26,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:59:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 04:59:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:59:26,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:26,574 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:26,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:59:26,575 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1380204475, now seen corresponding path program 9 times [2020-10-13 04:59:26,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:26,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014221843] [2020-10-13 04:59:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:26,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:30,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:30,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:59:30,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:30,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3887 [2020-10-13 04:59:30,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:30,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:59:30,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:30,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:59:30,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:30,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:30,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:30,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:30,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:30,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:59:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:59:30,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014221843] [2020-10-13 04:59:30,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:30,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:59:30,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719181005] [2020-10-13 04:59:30,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:59:30,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:59:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:59:30,616 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-13 04:59:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:30,862 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-13 04:59:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:59:30,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-13 04:59:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:30,863 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:59:30,863 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:59:30,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:59:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:59:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2020-10-13 04:59:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:59:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 04:59:30,870 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-13 04:59:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:30,871 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 04:59:30,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:59:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 04:59:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:59:30,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:30,872 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:30,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:59:30,872 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2054257670, now seen corresponding path program 10 times [2020-10-13 04:59:30,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:30,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788719028] [2020-10-13 04:59:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:30,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:34,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:34,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:59:34,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:34,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3770 [2020-10-13 04:59:34,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:59:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:34,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:59:34,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:34,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:34,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:34,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:34,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:34,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:34,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 04:59:34,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788719028] [2020-10-13 04:59:34,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:34,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:59:34,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231204098] [2020-10-13 04:59:34,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:59:34,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:59:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:59:34,789 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-13 04:59:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:35,022 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-10-13 04:59:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:59:35,023 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-13 04:59:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:35,024 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:59:35,025 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 04:59:35,026 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 04:59:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 04:59:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2020-10-13 04:59:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:59:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 04:59:35,037 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-10-13 04:59:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:35,038 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 04:59:35,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:59:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 04:59:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:59:35,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:35,041 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:35,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:59:35,041 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1290555749, now seen corresponding path program 11 times [2020-10-13 04:59:35,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:35,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125091654] [2020-10-13 04:59:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:35,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:36,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:38,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3236 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:59:38,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:38,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:38,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:38,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:38,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:38,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:38,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:38,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:38,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 04:59:38,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125091654] [2020-10-13 04:59:38,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:38,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:59:38,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233821164] [2020-10-13 04:59:38,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:59:38,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:59:38,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:59:38,431 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2020-10-13 04:59:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:38,632 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-13 04:59:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:59:38,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 04:59:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:38,634 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:59:38,634 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:59:38,635 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 04:59:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:59:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2020-10-13 04:59:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:59:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-13 04:59:38,642 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-13 04:59:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:38,642 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-13 04:59:38,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:59:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-13 04:59:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:59:38,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:38,643 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:38,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:59:38,643 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:38,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1738342170, now seen corresponding path program 12 times [2020-10-13 04:59:38,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:38,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048396275] [2020-10-13 04:59:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:38,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:40,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:42,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:42,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3959 [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:59:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:42,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:42,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:42,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:42,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:42,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:42,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:42,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:42,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:42,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:42,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:42,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 04:59:42,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048396275] [2020-10-13 04:59:42,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:42,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:59:42,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211632644] [2020-10-13 04:59:42,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:59:42,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:42,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:59:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:59:42,790 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-13 04:59:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:43,102 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-13 04:59:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:59:43,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 04:59:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:43,104 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:59:43,104 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:59:43,105 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 04:59:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:59:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2020-10-13 04:59:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 04:59:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 04:59:43,111 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-13 04:59:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:43,111 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 04:59:43,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:59:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 04:59:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:59:43,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:43,112 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:43,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:59:43,112 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1074190981, now seen corresponding path program 13 times [2020-10-13 04:59:43,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:43,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421253356] [2020-10-13 04:59:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:43,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:43,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:47,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:47,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:59:47,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:47,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4585 [2020-10-13 04:59:47,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:47,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:59:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:59:47,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:47,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:47,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:47,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:47,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:47,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:47,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:47,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 04:59:47,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421253356] [2020-10-13 04:59:47,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:47,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:59:47,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55678602] [2020-10-13 04:59:47,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:59:47,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:47,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:59:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:59:47,904 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2020-10-13 04:59:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:48,232 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2020-10-13 04:59:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:59:48,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-13 04:59:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:48,234 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:59:48,234 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:59:48,235 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 04:59:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:59:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2020-10-13 04:59:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:59:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 04:59:48,242 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-13 04:59:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:48,243 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 04:59:48,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:59:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 04:59:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:59:48,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:48,244 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:48,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:59:48,244 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash 308317638, now seen corresponding path program 14 times [2020-10-13 04:59:48,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:48,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585944004] [2020-10-13 04:59:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:48,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:48,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:50,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:53,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:53,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:59:53,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:59:53,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:59:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:59:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:59:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:53,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:53,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:53,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:53,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:53,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:53,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:53,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:53,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:53,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:53,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 04:59:53,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585944004] [2020-10-13 04:59:53,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:53,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:59:53,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879145718] [2020-10-13 04:59:53,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:59:53,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:53,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:59:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:59:53,464 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2020-10-13 04:59:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:53,796 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-13 04:59:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:59:53,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-13 04:59:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:53,799 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:59:53,799 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:59:53,801 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 04:59:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:59:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 49. [2020-10-13 04:59:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:59:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-13 04:59:53,812 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2020-10-13 04:59:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:53,812 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-13 04:59:53,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:59:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-13 04:59:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:59:53,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:53,813 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:53,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:59:53,813 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1181918299, now seen corresponding path program 15 times [2020-10-13 04:59:53,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:53,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885809933] [2020-10-13 04:59:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:53,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:53,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:56,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:58,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:58,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:59:58,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:58,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:59:58,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:58,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:59:58,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:58,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:59:58,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:59,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:59,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:59,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:59,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:59,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:59,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:59,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:59,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 04:59:59,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885809933] [2020-10-13 04:59:59,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:59,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:59:59,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877428232] [2020-10-13 04:59:59,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:59:59,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:59,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:59:59,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:59:59,025 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-10-13 04:59:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:59,377 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-10-13 04:59:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:59:59,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-13 04:59:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:59,379 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:59:59,379 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:59:59,380 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 04:59:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:59:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 51. [2020-10-13 04:59:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:59:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 04:59:59,387 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2020-10-13 04:59:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:59,387 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 04:59:59,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:59:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 04:59:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:59:59,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:59,388 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:59,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:59:59,389 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:59,389 INFO L82 PathProgramCache]: Analyzing trace with hash -760733018, now seen corresponding path program 16 times [2020-10-13 04:59:59,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:59,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876570426] [2020-10-13 04:59:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:59,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:02,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:00:04,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:04,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:00:04,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:04,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:04,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:04,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:04,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:04,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:04,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:04,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-13 05:00:04,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876570426] [2020-10-13 05:00:04,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:04,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:00:04,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176228838] [2020-10-13 05:00:04,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:00:04,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:00:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:00:04,636 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-13 05:00:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:04,940 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-13 05:00:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:00:04,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-13 05:00:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:04,943 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:00:04,943 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 05:00:04,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:00:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 05:00:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 53. [2020-10-13 05:00:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:00:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 05:00:04,950 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2020-10-13 05:00:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:04,950 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 05:00:04,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:00:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 05:00:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:00:04,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:04,951 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:04,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:00:04,951 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1014901563, now seen corresponding path program 17 times [2020-10-13 05:00:04,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:04,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919876698] [2020-10-13 05:00:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:09,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:09,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:00:09,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:09,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:00:09,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:09,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:00:09,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:00:09,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:00:09,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:10,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:10,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:10,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:10,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:10,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:10,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:10,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:10,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:10,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:10,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:10,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-13 05:00:10,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919876698] [2020-10-13 05:00:10,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:10,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:00:10,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843180737] [2020-10-13 05:00:10,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:00:10,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:10,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:00:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:00:10,219 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-10-13 05:00:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:10,514 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2020-10-13 05:00:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:00:10,515 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-13 05:00:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:10,516 INFO L225 Difference]: With dead ends: 138 [2020-10-13 05:00:10,516 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:00:10,517 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 05:00:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:00:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 55. [2020-10-13 05:00:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:00:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 05:00:10,525 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2020-10-13 05:00:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:10,525 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 05:00:10,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:00:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 05:00:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:00:10,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:10,526 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:10,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:00:10,526 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1678262394, now seen corresponding path program 18 times [2020-10-13 05:00:10,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:10,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807294171] [2020-10-13 05:00:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:15,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:00:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:15,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:15,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:15,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:15,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:15,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:15,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:15,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:00:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 05:00:15,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807294171] [2020-10-13 05:00:15,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:15,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:00:15,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874837458] [2020-10-13 05:00:15,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:00:15,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:15,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:00:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:00:15,907 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-13 05:00:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:16,500 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2020-10-13 05:00:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:00:16,501 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-13 05:00:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:16,503 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:00:16,503 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:00:16,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:00:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:00:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2020-10-13 05:00:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:00:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-13 05:00:16,520 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2020-10-13 05:00:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:16,520 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-13 05:00:16,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:00:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-13 05:00:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:00:16,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:16,522 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:16,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:00:16,522 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1600538085, now seen corresponding path program 19 times [2020-10-13 05:00:16,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:16,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917279895] [2020-10-13 05:00:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:16,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:21,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:21,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:00:21,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:21,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:00:21,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:00:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:00:21,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:21,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:21,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:21,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:21,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:21,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:21,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:21,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:21,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:21,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:21,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-13 05:00:21,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917279895] [2020-10-13 05:00:21,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:21,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:00:21,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029420571] [2020-10-13 05:00:21,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:00:21,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:00:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:00:21,892 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2020-10-13 05:00:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:22,293 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2020-10-13 05:00:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:00:22,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 05:00:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:22,295 INFO L225 Difference]: With dead ends: 150 [2020-10-13 05:00:22,295 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 05:00:22,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:00:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 05:00:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 59. [2020-10-13 05:00:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:00:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 05:00:22,301 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2020-10-13 05:00:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:22,302 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 05:00:22,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:00:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 05:00:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:00:22,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:22,303 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:22,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:00:22,303 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -376609690, now seen corresponding path program 20 times [2020-10-13 05:00:22,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:22,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652739370] [2020-10-13 05:00:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:22,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:27,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:27,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:00:27,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:27,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:00:27,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:00:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:00:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:00:27,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:27,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:27,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:27,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:27,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:27,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:27,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:27,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:00:27,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652739370] [2020-10-13 05:00:27,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:27,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:00:27,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939023656] [2020-10-13 05:00:27,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:00:27,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:00:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:00:27,628 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2020-10-13 05:00:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:28,115 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2020-10-13 05:00:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:00:28,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-13 05:00:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:28,119 INFO L225 Difference]: With dead ends: 156 [2020-10-13 05:00:28,119 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 05:00:28,120 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 05:00:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 05:00:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 61. [2020-10-13 05:00:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:00:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-13 05:00:28,126 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2020-10-13 05:00:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:28,126 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-13 05:00:28,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:00:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-13 05:00:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:00:28,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:28,127 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:28,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:00:28,127 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1505972475, now seen corresponding path program 21 times [2020-10-13 05:00:28,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:28,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629200936] [2020-10-13 05:00:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:00:33,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:00:33,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:00:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:00:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:00:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:33,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:33,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:33,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-13 05:00:33,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629200936] [2020-10-13 05:00:33,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:33,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:00:33,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461233378] [2020-10-13 05:00:33,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:00:33,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:33,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:00:33,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:00:33,522 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2020-10-13 05:00:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:34,051 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2020-10-13 05:00:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:00:34,051 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-13 05:00:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:34,053 INFO L225 Difference]: With dead ends: 162 [2020-10-13 05:00:34,053 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 05:00:34,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:00:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 05:00:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 63. [2020-10-13 05:00:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:00:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 05:00:34,060 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2020-10-13 05:00:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:34,060 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 05:00:34,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:00:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 05:00:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:00:34,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:34,061 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:34,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:00:34,061 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:34,062 INFO L82 PathProgramCache]: Analyzing trace with hash -819523258, now seen corresponding path program 22 times [2020-10-13 05:00:34,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:34,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406278840] [2020-10-13 05:00:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:34,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:34,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:39,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:00:39,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:39,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:00:39,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:00:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 05:00:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:00:39,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:39,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:39,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:39,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:39,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-13 05:00:39,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406278840] [2020-10-13 05:00:39,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:39,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:00:39,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511671137] [2020-10-13 05:00:39,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:00:39,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:00:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:00:39,461 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2020-10-13 05:00:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:39,890 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-10-13 05:00:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:00:39,891 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-13 05:00:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:39,892 INFO L225 Difference]: With dead ends: 168 [2020-10-13 05:00:39,892 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 05:00:39,893 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 05:00:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 05:00:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2020-10-13 05:00:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 05:00:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 05:00:39,898 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-10-13 05:00:39,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:39,898 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 05:00:39,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:00:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 05:00:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:00:39,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:39,899 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:39,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:00:39,900 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash -393801691, now seen corresponding path program 23 times [2020-10-13 05:00:39,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:39,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770636504] [2020-10-13 05:00:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:39,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:40,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:44,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:44,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:00:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:45,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:45,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:45,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:45,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:45,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-13 05:00:45,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770636504] [2020-10-13 05:00:45,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:45,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:00:45,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289453895] [2020-10-13 05:00:45,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:00:45,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:00:45,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:00:45,331 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2020-10-13 05:00:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:45,871 INFO L93 Difference]: Finished difference Result 174 states and 203 transitions. [2020-10-13 05:00:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:00:45,872 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-13 05:00:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:45,873 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:00:45,873 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:00:45,874 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 05:00:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:00:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 67. [2020-10-13 05:00:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:00:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 05:00:45,880 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-13 05:00:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:45,880 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 05:00:45,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:00:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 05:00:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:00:45,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:45,881 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:45,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:00:45,881 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -654129626, now seen corresponding path program 24 times [2020-10-13 05:00:45,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:45,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738429386] [2020-10-13 05:00:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:50,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:50,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:00:50,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:50,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:00:50,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:00:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:00:50,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:51,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:51,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:51,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:51,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 05:00:51,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738429386] [2020-10-13 05:00:51,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:51,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:00:51,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551203166] [2020-10-13 05:00:51,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:00:51,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:51,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:00:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:00:51,331 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2020-10-13 05:00:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:51,904 INFO L93 Difference]: Finished difference Result 180 states and 210 transitions. [2020-10-13 05:00:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:00:51,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-13 05:00:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:51,906 INFO L225 Difference]: With dead ends: 180 [2020-10-13 05:00:51,906 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 05:00:51,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:00:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 05:00:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 69. [2020-10-13 05:00:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:00:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 05:00:51,913 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2020-10-13 05:00:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:51,913 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 05:00:51,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:00:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 05:00:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:00:51,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:51,914 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:51,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:00:51,914 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:51,914 INFO L82 PathProgramCache]: Analyzing trace with hash -834180795, now seen corresponding path program 25 times [2020-10-13 05:00:51,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:51,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343047587] [2020-10-13 05:00:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:56,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:56,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:00:56,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:00:56,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:00:56,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:56,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:00:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:00:56,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:57,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:57,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:57,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:57,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:57,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:57,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:57,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-13 05:00:57,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343047587] [2020-10-13 05:00:57,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:57,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:00:57,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251215683] [2020-10-13 05:00:57,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:00:57,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:00:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:00:57,416 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2020-10-13 05:00:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:57,914 INFO L93 Difference]: Finished difference Result 186 states and 217 transitions. [2020-10-13 05:00:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:00:57,915 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-13 05:00:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:57,917 INFO L225 Difference]: With dead ends: 186 [2020-10-13 05:00:57,917 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 05:00:57,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:00:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 05:00:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2020-10-13 05:00:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:00:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 05:00:57,925 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 65 [2020-10-13 05:00:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:57,926 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 05:00:57,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:00:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 05:00:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:00:57,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:57,927 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:57,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:00:57,928 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash -337739002, now seen corresponding path program 26 times [2020-10-13 05:00:57,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:57,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851188250] [2020-10-13 05:00:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:57,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:58,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:02,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:02,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:01:02,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:02,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:01:02,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:01:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 05:01:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:01:02,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:03,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:03,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:03,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:03,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:03,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:03,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:03,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:03,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:03,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:01:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-13 05:01:03,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851188250] [2020-10-13 05:01:03,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:03,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:01:03,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147743469] [2020-10-13 05:01:03,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:01:03,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:03,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:01:03,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:01:03,395 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2020-10-13 05:01:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:04,017 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2020-10-13 05:01:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:01:04,018 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-13 05:01:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:04,020 INFO L225 Difference]: With dead ends: 192 [2020-10-13 05:01:04,020 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 05:01:04,021 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 05:01:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 05:01:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 73. [2020-10-13 05:01:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:01:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 05:01:04,026 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-13 05:01:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:04,027 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 05:01:04,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:01:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 05:01:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:01:04,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:04,028 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:04,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:01:04,028 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1996470885, now seen corresponding path program 27 times [2020-10-13 05:01:04,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:04,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688423951] [2020-10-13 05:01:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:04,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:09,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:09,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:01:09,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:09,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:01:09,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:09,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:01:09,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:09,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:01:09,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:09,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:09,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:09,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:09,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:09,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:09,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:09,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:09,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:09,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:09,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:09,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-13 05:01:09,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688423951] [2020-10-13 05:01:09,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:09,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:01:09,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34446632] [2020-10-13 05:01:09,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:01:09,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:01:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:01:09,584 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2020-10-13 05:01:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:10,283 INFO L93 Difference]: Finished difference Result 198 states and 231 transitions. [2020-10-13 05:01:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:01:10,284 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-13 05:01:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:10,285 INFO L225 Difference]: With dead ends: 198 [2020-10-13 05:01:10,285 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 05:01:10,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:01:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 05:01:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-10-13 05:01:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:01:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-13 05:01:10,291 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-10-13 05:01:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:10,292 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-13 05:01:10,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:01:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-13 05:01:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:01:10,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:10,293 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:10,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:01:10,293 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 620251110, now seen corresponding path program 28 times [2020-10-13 05:01:10,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:10,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34515826] [2020-10-13 05:01:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:10,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:10,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:15,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:01:15,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:15,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:15,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:15,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:15,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:15,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:15,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:15,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:15,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:15,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:15,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-13 05:01:15,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34515826] [2020-10-13 05:01:15,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:15,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:01:15,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453418389] [2020-10-13 05:01:15,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:01:15,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:15,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:01:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:01:15,882 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2020-10-13 05:01:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:16,468 INFO L93 Difference]: Finished difference Result 204 states and 238 transitions. [2020-10-13 05:01:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:01:16,468 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-13 05:01:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:16,470 INFO L225 Difference]: With dead ends: 204 [2020-10-13 05:01:16,470 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 05:01:16,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:01:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 05:01:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 77. [2020-10-13 05:01:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 05:01:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 05:01:16,477 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-13 05:01:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:16,478 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 05:01:16,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:01:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 05:01:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:01:16,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:16,479 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:16,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:01:16,479 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1716386939, now seen corresponding path program 29 times [2020-10-13 05:01:16,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:16,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777560280] [2020-10-13 05:01:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:16,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:21,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:21,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:01:21,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:21,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:01:21,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:01:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:01:21,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:22,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:22,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-13 05:01:22,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777560280] [2020-10-13 05:01:22,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:22,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:01:22,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822437416] [2020-10-13 05:01:22,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:01:22,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:01:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:01:22,093 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2020-10-13 05:01:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:22,836 INFO L93 Difference]: Finished difference Result 210 states and 245 transitions. [2020-10-13 05:01:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:01:22,837 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-13 05:01:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:22,838 INFO L225 Difference]: With dead ends: 210 [2020-10-13 05:01:22,838 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:01:22,840 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 05:01:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:01:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 79. [2020-10-13 05:01:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:01:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 05:01:22,846 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2020-10-13 05:01:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:22,846 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 05:01:22,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:01:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 05:01:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:01:22,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:22,847 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:22,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:01:22,847 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1173482298, now seen corresponding path program 30 times [2020-10-13 05:01:22,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:22,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90814125] [2020-10-13 05:01:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:23,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:27,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:01:27,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:28,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:28,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:28,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:28,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:28,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-13 05:01:28,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90814125] [2020-10-13 05:01:28,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:28,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:01:28,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989753434] [2020-10-13 05:01:28,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:01:28,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:01:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:01:28,507 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2020-10-13 05:01:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:29,129 INFO L93 Difference]: Finished difference Result 216 states and 252 transitions. [2020-10-13 05:01:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:01:29,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-13 05:01:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:29,131 INFO L225 Difference]: With dead ends: 216 [2020-10-13 05:01:29,131 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 05:01:29,132 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 05:01:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 05:01:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 81. [2020-10-13 05:01:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:01:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-13 05:01:29,140 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2020-10-13 05:01:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:29,140 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-13 05:01:29,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:01:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-13 05:01:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:01:29,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:29,141 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:29,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:01:29,141 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1528806235, now seen corresponding path program 31 times [2020-10-13 05:01:29,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:29,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878997717] [2020-10-13 05:01:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:29,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:29,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:34,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:34,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:01:34,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:01:34,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:34,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:01:34,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 05:01:34,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:01:34,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:34,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:34,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-13 05:01:34,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878997717] [2020-10-13 05:01:34,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:34,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:01:34,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964340574] [2020-10-13 05:01:34,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:01:34,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:01:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:01:34,872 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2020-10-13 05:01:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:35,514 INFO L93 Difference]: Finished difference Result 222 states and 259 transitions. [2020-10-13 05:01:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:01:35,515 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-13 05:01:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:35,516 INFO L225 Difference]: With dead ends: 222 [2020-10-13 05:01:35,516 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 05:01:35,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:01:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 05:01:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2020-10-13 05:01:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:01:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 05:01:35,523 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-10-13 05:01:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:35,523 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 05:01:35,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:01:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 05:01:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:01:35,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:35,524 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:35,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:01:35,524 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash -648156762, now seen corresponding path program 32 times [2020-10-13 05:01:35,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:35,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967739135] [2020-10-13 05:01:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:35,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:40,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:40,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:01:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:41,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:41,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:41,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:41,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:41,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:41,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:41,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:41,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 05:01:41,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967739135] [2020-10-13 05:01:41,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:41,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:01:41,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920121800] [2020-10-13 05:01:41,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:01:41,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:41,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:01:41,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:01:41,258 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2020-10-13 05:01:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:41,924 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2020-10-13 05:01:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:01:41,925 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-13 05:01:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:41,927 INFO L225 Difference]: With dead ends: 228 [2020-10-13 05:01:41,927 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 05:01:41,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:01:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 05:01:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 85. [2020-10-13 05:01:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:01:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-13 05:01:41,934 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-10-13 05:01:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:41,934 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-13 05:01:41,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:01:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-13 05:01:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:01:41,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:41,935 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:41,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:01:41,935 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -561218107, now seen corresponding path program 33 times [2020-10-13 05:01:41,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:41,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651634369] [2020-10-13 05:01:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:42,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:01:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:01:46,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:47,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:47,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:47,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:47,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-13 05:01:47,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651634369] [2020-10-13 05:01:47,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:47,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:01:47,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004778915] [2020-10-13 05:01:47,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:01:47,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:47,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:01:47,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:01:47,698 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2020-10-13 05:01:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:48,598 INFO L93 Difference]: Finished difference Result 234 states and 273 transitions. [2020-10-13 05:01:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:01:48,598 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-13 05:01:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:48,600 INFO L225 Difference]: With dead ends: 234 [2020-10-13 05:01:48,600 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 05:01:48,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:01:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 05:01:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 87. [2020-10-13 05:01:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 05:01:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-13 05:01:48,606 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2020-10-13 05:01:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:48,607 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-13 05:01:48,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:01:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-13 05:01:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:01:48,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:48,608 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:48,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:01:48,608 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1985624442, now seen corresponding path program 34 times [2020-10-13 05:01:48,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:48,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548784541] [2020-10-13 05:01:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:53,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:53,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:01:53,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:01:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:01:53,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:01:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:01:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:54,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:54,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-13 05:01:54,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548784541] [2020-10-13 05:01:54,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:54,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:01:54,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082002494] [2020-10-13 05:01:54,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:01:54,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:01:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:01:54,428 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2020-10-13 05:01:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:55,395 INFO L93 Difference]: Finished difference Result 240 states and 280 transitions. [2020-10-13 05:01:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:01:55,396 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-13 05:01:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:55,398 INFO L225 Difference]: With dead ends: 240 [2020-10-13 05:01:55,398 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 05:01:55,399 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 05:01:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 05:01:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 89. [2020-10-13 05:01:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 05:01:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-13 05:01:55,406 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 83 [2020-10-13 05:01:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:55,406 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-13 05:01:55,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:01:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-13 05:01:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 05:01:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:55,407 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:55,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:01:55,408 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:55,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2076659995, now seen corresponding path program 35 times [2020-10-13 05:01:55,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:55,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340132294] [2020-10-13 05:01:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:55,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:00,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:02:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:01,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:01,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:01,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:01,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:01,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:01,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:01,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:01,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:01,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-13 05:02:01,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340132294] [2020-10-13 05:02:01,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:01,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:02:01,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924008026] [2020-10-13 05:02:01,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:02:01,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:02:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:02:01,568 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2020-10-13 05:02:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:02,483 INFO L93 Difference]: Finished difference Result 246 states and 287 transitions. [2020-10-13 05:02:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:02:02,484 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-13 05:02:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:02,486 INFO L225 Difference]: With dead ends: 246 [2020-10-13 05:02:02,486 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 05:02:02,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:02:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 05:02:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 91. [2020-10-13 05:02:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 05:02:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-13 05:02:02,501 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-10-13 05:02:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:02,502 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-13 05:02:02,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:02:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-13 05:02:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 05:02:02,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:02,504 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:02,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:02:02,504 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1977373850, now seen corresponding path program 36 times [2020-10-13 05:02:02,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:02,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860318662] [2020-10-13 05:02:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:02,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:07,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:08,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:08,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 05:02:08,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5669 [2020-10-13 05:02:08,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:02:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 05:02:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:02:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:09,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:09,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:09,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:09,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-13 05:02:09,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860318662] [2020-10-13 05:02:09,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:09,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:02:09,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666440525] [2020-10-13 05:02:09,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:02:09,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:09,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:02:09,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:02:09,133 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2020-10-13 05:02:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:10,372 INFO L93 Difference]: Finished difference Result 252 states and 294 transitions. [2020-10-13 05:02:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:02:10,372 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-13 05:02:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:10,374 INFO L225 Difference]: With dead ends: 252 [2020-10-13 05:02:10,374 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 05:02:10,375 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 05:02:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 05:02:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 93. [2020-10-13 05:02:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 05:02:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-13 05:02:10,381 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2020-10-13 05:02:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:10,381 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-13 05:02:10,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:02:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-13 05:02:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:02:10,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:10,382 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:10,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:02:10,382 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash -353970171, now seen corresponding path program 37 times [2020-10-13 05:02:10,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:10,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459997979] [2020-10-13 05:02:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:10,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:12,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 05:02:15,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:16,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:16,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:16,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:16,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:16,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-13 05:02:16,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459997979] [2020-10-13 05:02:16,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:16,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:02:16,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719202852] [2020-10-13 05:02:16,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:02:16,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:16,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:02:16,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:02:16,341 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2020-10-13 05:02:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:17,157 INFO L93 Difference]: Finished difference Result 258 states and 301 transitions. [2020-10-13 05:02:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:02:17,158 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-13 05:02:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:17,160 INFO L225 Difference]: With dead ends: 258 [2020-10-13 05:02:17,160 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 05:02:17,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:02:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 05:02:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 95. [2020-10-13 05:02:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 05:02:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-13 05:02:17,166 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 89 [2020-10-13 05:02:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:17,166 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-13 05:02:17,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:02:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-13 05:02:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 05:02:17,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:17,169 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:17,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:02:17,170 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 848664646, now seen corresponding path program 38 times [2020-10-13 05:02:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:17,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255408541] [2020-10-13 05:02:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:22,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 05:02:22,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:22,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:02:22,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:02:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 05:02:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:02:22,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:23,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:23,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:23,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:23,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-13 05:02:23,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255408541] [2020-10-13 05:02:23,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:23,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:02:23,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473320342] [2020-10-13 05:02:23,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:02:23,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:02:23,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:02:23,180 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2020-10-13 05:02:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:24,273 INFO L93 Difference]: Finished difference Result 264 states and 308 transitions. [2020-10-13 05:02:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:02:24,274 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-13 05:02:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:24,276 INFO L225 Difference]: With dead ends: 264 [2020-10-13 05:02:24,276 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 05:02:24,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:02:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 05:02:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 97. [2020-10-13 05:02:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:02:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-13 05:02:24,282 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 91 [2020-10-13 05:02:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:24,282 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-13 05:02:24,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:02:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-13 05:02:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 05:02:24,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:24,283 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:24,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:02:24,283 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753307, now seen corresponding path program 39 times [2020-10-13 05:02:24,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:24,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447154809] [2020-10-13 05:02:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:24,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:26,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:29,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:29,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 05:02:29,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:29,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:02:29,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:29,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:02:29,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 05:02:29,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:02:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:30,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:30,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:30,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:02:30,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-13 05:02:30,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447154809] [2020-10-13 05:02:30,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:30,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:02:30,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872651989] [2020-10-13 05:02:30,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:02:30,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:02:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:02:30,332 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2020-10-13 05:02:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:31,457 INFO L93 Difference]: Finished difference Result 270 states and 315 transitions. [2020-10-13 05:02:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:02:31,458 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-13 05:02:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:31,459 INFO L225 Difference]: With dead ends: 270 [2020-10-13 05:02:31,459 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 05:02:31,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:02:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 05:02:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 99. [2020-10-13 05:02:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 05:02:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-13 05:02:31,465 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 93 [2020-10-13 05:02:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:31,466 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-13 05:02:31,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:02:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-13 05:02:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:02:31,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:31,467 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:31,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:02:31,467 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1396280614, now seen corresponding path program 40 times [2020-10-13 05:02:31,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:31,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147043216] [2020-10-13 05:02:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:31,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:34,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:36,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:36,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 05:02:36,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 05:02:36,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:02:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 05:02:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:02:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:37,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:37,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-10-13 05:02:37,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147043216] [2020-10-13 05:02:37,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:37,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:02:37,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172018679] [2020-10-13 05:02:37,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:02:37,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:02:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:02:37,573 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2020-10-13 05:02:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:38,646 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2020-10-13 05:02:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:02:38,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-13 05:02:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:38,648 INFO L225 Difference]: With dead ends: 276 [2020-10-13 05:02:38,648 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 05:02:38,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:02:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 05:02:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 101. [2020-10-13 05:02:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 05:02:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-13 05:02:38,654 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2020-10-13 05:02:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:38,654 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-13 05:02:38,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:02:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-13 05:02:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 05:02:38,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:38,655 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:38,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:02:38,656 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:38,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2066673083, now seen corresponding path program 41 times [2020-10-13 05:02:38,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:38,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988823623] [2020-10-13 05:02:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:38,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:43,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 05:02:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 05:02:43,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:44,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:44,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2020-10-13 05:02:44,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988823623] [2020-10-13 05:02:44,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:44,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:02:44,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540089608] [2020-10-13 05:02:44,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:02:44,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:02:44,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:02:44,719 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2020-10-13 05:02:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:45,696 INFO L93 Difference]: Finished difference Result 282 states and 329 transitions. [2020-10-13 05:02:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:02:45,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-13 05:02:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:45,699 INFO L225 Difference]: With dead ends: 282 [2020-10-13 05:02:45,699 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 05:02:45,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:02:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 05:02:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 103. [2020-10-13 05:02:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 05:02:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-13 05:02:45,705 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 97 [2020-10-13 05:02:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:45,705 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-13 05:02:45,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:02:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-13 05:02:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 05:02:45,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:45,706 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:45,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:02:45,707 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:45,707 INFO L82 PathProgramCache]: Analyzing trace with hash 349014534, now seen corresponding path program 42 times [2020-10-13 05:02:45,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:45,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009315695] [2020-10-13 05:02:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:45,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:48,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:02:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:02:50,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:51,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:51,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:02:51,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:51,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:51,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:51,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:51,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-10-13 05:02:51,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009315695] [2020-10-13 05:02:51,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:51,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:02:51,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246817427] [2020-10-13 05:02:51,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:02:51,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:02:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:02:51,915 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2020-10-13 05:02:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:52,918 INFO L93 Difference]: Finished difference Result 288 states and 336 transitions. [2020-10-13 05:02:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:02:52,919 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-13 05:02:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:52,921 INFO L225 Difference]: With dead ends: 288 [2020-10-13 05:02:52,921 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 05:02:52,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:02:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 05:02:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 105. [2020-10-13 05:02:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 05:02:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-13 05:02:52,927 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 99 [2020-10-13 05:02:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:52,928 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-13 05:02:52,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:02:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-13 05:02:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:02:52,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:52,929 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:52,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:02:52,929 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -141483163, now seen corresponding path program 43 times [2020-10-13 05:02:52,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:52,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878173374] [2020-10-13 05:02:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 05:02:57,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:57,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 05:02:57,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:02:57,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:57,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 05:02:57,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:59,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:59,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:59,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:59,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:59,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:59,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2020-10-13 05:02:59,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878173374] [2020-10-13 05:02:59,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:59,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:02:59,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807716674] [2020-10-13 05:02:59,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:02:59,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:02:59,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:02:59,176 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2020-10-13 05:03:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:00,224 INFO L93 Difference]: Finished difference Result 294 states and 343 transitions. [2020-10-13 05:03:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:03:00,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-13 05:03:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:00,226 INFO L225 Difference]: With dead ends: 294 [2020-10-13 05:03:00,226 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 05:03:00,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:03:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 05:03:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 107. [2020-10-13 05:03:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 05:03:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-13 05:03:00,233 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 101 [2020-10-13 05:03:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:00,233 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-13 05:03:00,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:03:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-13 05:03:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 05:03:00,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:00,234 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:00,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:03:00,235 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash -661680410, now seen corresponding path program 44 times [2020-10-13 05:03:00,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:00,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310143455] [2020-10-13 05:03:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:00,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:03:05,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:06,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:06,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:06,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:06,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-13 05:03:06,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310143455] [2020-10-13 05:03:06,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:06,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 05:03:06,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639812471] [2020-10-13 05:03:06,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 05:03:06,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:06,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 05:03:06,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:03:06,516 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2020-10-13 05:03:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:07,555 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2020-10-13 05:03:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 05:03:07,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-13 05:03:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:07,558 INFO L225 Difference]: With dead ends: 300 [2020-10-13 05:03:07,558 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 05:03:07,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:03:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 05:03:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 109. [2020-10-13 05:03:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 05:03:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-13 05:03:07,565 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 103 [2020-10-13 05:03:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:07,565 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-13 05:03:07,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 05:03:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-13 05:03:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 05:03:07,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:07,566 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:07,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:03:07,567 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:07,567 INFO L82 PathProgramCache]: Analyzing trace with hash -363123579, now seen corresponding path program 45 times [2020-10-13 05:03:07,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:07,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635128335] [2020-10-13 05:03:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:07,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:11,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking...