/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/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:56:48,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:56:48,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:56:48,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:56:48,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:56:48,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:56:48,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:56:48,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:56:48,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:56:48,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:56:48,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:56:48,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:56:48,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:56:48,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:56:48,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:56:48,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:56:48,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:56:48,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:56:48,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:56:48,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:56:48,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:56:48,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:56:48,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:56:48,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:56:48,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:56:48,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:56:48,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:56:48,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:56:48,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:56:48,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:56:48,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:56:48,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:56:48,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:56:48,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:56:48,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:56:48,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:56:48,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:56:48,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:56:48,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:56:48,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:56:48,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:56:48,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:56:48,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:56:48,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:56:48,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:56:48,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:56:48,769 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:56:48,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:56:48,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:56:48,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:56:48,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:56:48,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:56:48,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:56:48,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:56:48,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:56:48,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:56:48,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:56:48,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:56:48,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:56:48,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:56:48,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:56:48,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:56:48,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:56:48,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:56:48,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:56:48,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:56:48,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:56:48,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:56:48,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:56:48,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:56:48,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:56:48,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:56:49,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:56:49,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:56:49,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:56:49,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:56:49,078 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:56:49,081 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2020-10-13 10:56:49,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11ec913d3/6753b4da2e7346c2b0bd34a6a48839da/FLAG3b61c5016 [2020-10-13 10:56:49,537 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:56:49,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2020-10-13 10:56:49,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11ec913d3/6753b4da2e7346c2b0bd34a6a48839da/FLAG3b61c5016 [2020-10-13 10:56:49,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11ec913d3/6753b4da2e7346c2b0bd34a6a48839da [2020-10-13 10:56:49,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:56:49,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:56:49,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:56:49,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:56:49,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:56:49,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:56:49" (1/1) ... [2020-10-13 10:56:49,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49edf284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:49, skipping insertion in model container [2020-10-13 10:56:49,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:56:49" (1/1) ... [2020-10-13 10:56:49,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:56:50,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:56:50,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:56:50,171 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:56:50,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:56:50,204 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:56:50,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50 WrapperNode [2020-10-13 10:56:50,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:56:50,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:56:50,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:56:50,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:56:50,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... [2020-10-13 10:56:50,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:56:50,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:56:50,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:56:50,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:56:50,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:56:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:56:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:56:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:56:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:56:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:56:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 10:56:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:56:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:56:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:56:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:56:50,614 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:56:50,614 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 10:56:50,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:56:50 BoogieIcfgContainer [2020-10-13 10:56:50,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:56:50,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:56:50,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:56:50,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:56:50,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:56:49" (1/3) ... [2020-10-13 10:56:50,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a457f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:56:50, skipping insertion in model container [2020-10-13 10:56:50,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:50" (2/3) ... [2020-10-13 10:56:50,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a457f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:56:50, skipping insertion in model container [2020-10-13 10:56:50,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:56:50" (3/3) ... [2020-10-13 10:56:50,628 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de62.c [2020-10-13 10:56:50,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:56:50,649 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:56:50,665 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:56:50,695 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:56:50,695 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:56:50,695 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:56:50,696 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:56:50,696 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:56:50,696 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:56:50,696 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:56:50,696 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:56:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 10:56:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:56:50,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:50,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:50,724 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:50,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash -858988731, now seen corresponding path program 1 times [2020-10-13 10:56:50,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:50,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045908382] [2020-10-13 10:56:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:50,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:50,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:50,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:56:50,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:50,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-13 10:56:50,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:50,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:56:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:51,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:51,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:56:51,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:51,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045908382] [2020-10-13 10:56:51,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:51,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:56:51,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628370808] [2020-10-13 10:56:51,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:56:51,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:56:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:56:51,066 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-10-13 10:56:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:51,100 INFO L93 Difference]: Finished difference Result 42 states and 65 transitions. [2020-10-13 10:56:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:56:51,102 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-10-13 10:56:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:51,110 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:56:51,110 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:56:51,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:56:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:56:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:56:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:56:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-10-13 10:56:51,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2020-10-13 10:56:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:51,150 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-10-13 10:56:51,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:56:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-10-13 10:56:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:56:51,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:51,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:51,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:56:51,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -114036159, now seen corresponding path program 1 times [2020-10-13 10:56:51,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:51,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308337561] [2020-10-13 10:56:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:56:51,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-13 10:56:51,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:51,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:51,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:51,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:51,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:51,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:56:51,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:51,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:51,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308337561] [2020-10-13 10:56:51,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:51,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:56:51,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735609903] [2020-10-13 10:56:51,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:56:51,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:56:51,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:51,477 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 5 states. [2020-10-13 10:56:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:51,545 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2020-10-13 10:56:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:51,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 10:56:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:51,546 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:56:51,547 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:56:51,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:56:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:56:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:56:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-13 10:56:51,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2020-10-13 10:56:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:51,555 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-13 10:56:51,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:56:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-13 10:56:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:56:51,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:51,556 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 10:56:51,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:56:51,557 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:51,557 INFO L82 PathProgramCache]: Analyzing trace with hash 795384167, now seen corresponding path program 1 times [2020-10-13 10:56:51,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:51,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214176701] [2020-10-13 10:56:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:56:51,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-13 10:56:51,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:56:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:56:51,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:51,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:51,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:51,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:51,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:51,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:51,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214176701] [2020-10-13 10:56:51,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:51,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:56:51,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296340899] [2020-10-13 10:56:51,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:56:51,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:56:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:56:51,776 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 3 states. [2020-10-13 10:56:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:51,812 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2020-10-13 10:56:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:56:51,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 10:56:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:51,814 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:56:51,814 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:56:51,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:56:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:56:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 10:56:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:56:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2020-10-13 10:56:51,823 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 17 [2020-10-13 10:56:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:51,823 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2020-10-13 10:56:51,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:56:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2020-10-13 10:56:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:56:51,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:51,825 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 10:56:51,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:56:51,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2096754730, now seen corresponding path program 1 times [2020-10-13 10:56:51,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:51,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712358283] [2020-10-13 10:56:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:56:51,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:51,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-13 10:56:51,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:56:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:56:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:51,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712358283] [2020-10-13 10:56:51,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:51,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:56:51,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472609128] [2020-10-13 10:56:51,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:56:51,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:51,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:56:51,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:56:51,997 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand 3 states. [2020-10-13 10:56:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:52,020 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2020-10-13 10:56:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:56:52,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 10:56:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:52,021 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:56:52,021 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:56:52,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:56:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:56:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 10:56:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:56:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2020-10-13 10:56:52,029 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 17 [2020-10-13 10:56:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:52,030 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2020-10-13 10:56:52,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:56:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-10-13 10:56:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:56:52,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:52,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:52,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:56:52,031 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1029509497, now seen corresponding path program 1 times [2020-10-13 10:56:52,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:52,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420183351] [2020-10-13 10:56:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:56:52,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 10:56:52,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:56:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:52,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:52,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:52,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:52,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:56:52,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:52,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:56:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:56:52,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420183351] [2020-10-13 10:56:52,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:52,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:56:52,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664116898] [2020-10-13 10:56:52,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:52,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:52,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:52,283 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 4 states. [2020-10-13 10:56:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:52,347 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-10-13 10:56:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:52,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 10:56:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:52,350 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:56:52,350 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:56:52,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:56:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 10:56:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:56:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2020-10-13 10:56:52,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2020-10-13 10:56:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:52,362 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2020-10-13 10:56:52,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2020-10-13 10:56:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:56:52,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:52,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:52,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:56:52,365 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1589919752, now seen corresponding path program 1 times [2020-10-13 10:56:52,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:52,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357780637] [2020-10-13 10:56:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:52,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:56:52,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:52,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-13 10:56:52,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:52,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:52,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:52,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:56:52,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:52,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:52,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:56:52,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357780637] [2020-10-13 10:56:52,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:52,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:56:52,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883867756] [2020-10-13 10:56:52,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:52,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:52,642 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand 4 states. [2020-10-13 10:56:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:52,708 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2020-10-13 10:56:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:52,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 10:56:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:52,709 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:56:52,709 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:56:52,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:56:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:56:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:56:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2020-10-13 10:56:52,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2020-10-13 10:56:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:52,723 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2020-10-13 10:56:52,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2020-10-13 10:56:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:56:52,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:52,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:52,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:56:52,726 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:52,727 INFO L82 PathProgramCache]: Analyzing trace with hash -574500320, now seen corresponding path program 1 times [2020-10-13 10:56:52,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:52,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902505856] [2020-10-13 10:56:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:56:53,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-13 10:56:53,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:56:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:53,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:53,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:53,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:53,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902505856] [2020-10-13 10:56:53,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:53,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:53,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238698240] [2020-10-13 10:56:53,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:53,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:53,068 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 4 states. [2020-10-13 10:56:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:53,113 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-13 10:56:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:53,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 10:56:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:53,114 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:56:53,114 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:56:53,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 10:56:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:56:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:56:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:56:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-10-13 10:56:53,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 20 [2020-10-13 10:56:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:53,120 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-10-13 10:56:53,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-10-13 10:56:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:56:53,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:53,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:53,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:56:53,122 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1837594688, now seen corresponding path program 1 times [2020-10-13 10:56:53,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:53,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309018878] [2020-10-13 10:56:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:56:53,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:53,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 10:56:53,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:56:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:53,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:53,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:53,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:53,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309018878] [2020-10-13 10:56:53,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:53,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:53,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615641589] [2020-10-13 10:56:53,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:53,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:53,221 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 4 states. [2020-10-13 10:56:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:53,263 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-10-13 10:56:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:53,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 10:56:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:53,266 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:56:53,266 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:56:53,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 10:56:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:56:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-13 10:56:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:56:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2020-10-13 10:56:53,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 20 [2020-10-13 10:56:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:53,274 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2020-10-13 10:56:53,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2020-10-13 10:56:53,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:56:53,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:53,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:53,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:56:53,276 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1596962185, now seen corresponding path program 1 times [2020-10-13 10:56:53,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:53,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216595813] [2020-10-13 10:56:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:56:53,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 10:56:53,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:56:53,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:53,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:53,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216595813] [2020-10-13 10:56:53,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:53,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:53,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132971493] [2020-10-13 10:56:53,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:53,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:53,417 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 4 states. [2020-10-13 10:56:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:53,447 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-10-13 10:56:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:53,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 10:56:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:53,448 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:56:53,448 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:56:53,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 10:56:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:56:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 10:56:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:56:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2020-10-13 10:56:53,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 21 [2020-10-13 10:56:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:53,455 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2020-10-13 10:56:53,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-10-13 10:56:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:56:53,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:53,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:53,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:56:53,456 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -194133786, now seen corresponding path program 1 times [2020-10-13 10:56:53,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:53,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999502639] [2020-10-13 10:56:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:56:53,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:53,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 10:56:53,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:56:53,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:53,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:53,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:53,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:53,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999502639] [2020-10-13 10:56:53,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:53,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:53,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838652935] [2020-10-13 10:56:53,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:53,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:53,635 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 4 states. [2020-10-13 10:56:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:53,696 INFO L93 Difference]: Finished difference Result 55 states and 76 transitions. [2020-10-13 10:56:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:53,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 10:56:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:53,698 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:56:53,698 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:56:53,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 10:56:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:56:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-10-13 10:56:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:56:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2020-10-13 10:56:53,711 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 21 [2020-10-13 10:56:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:53,711 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2020-10-13 10:56:53,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2020-10-13 10:56:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:56:53,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:53,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:53,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:56:53,716 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash -716359928, now seen corresponding path program 2 times [2020-10-13 10:56:53,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:53,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675501171] [2020-10-13 10:56:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:54,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:56:54,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-13 10:56:54,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:54,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:54,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:56:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:54,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:54,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:54,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:54,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:54,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:54,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:56:54,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675501171] [2020-10-13 10:56:54,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:54,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:54,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024488225] [2020-10-13 10:56:54,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:54,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:54,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:54,349 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand 6 states. [2020-10-13 10:56:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:54,519 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2020-10-13 10:56:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:54,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:56:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:54,523 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:56:54,523 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:56:54,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:56:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:56:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:56:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-10-13 10:56:54,532 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 21 [2020-10-13 10:56:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:54,533 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-10-13 10:56:54,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-10-13 10:56:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:56:54,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:54,539 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:54,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:56:54,540 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash -786453376, now seen corresponding path program 2 times [2020-10-13 10:56:54,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:54,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532974669] [2020-10-13 10:56:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:55,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:55,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:56:55,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:56:55,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-13 10:56:55,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:55,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:55,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:55,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:55,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:55,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:55,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:55,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:55,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:55,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:55,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:55,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:55,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:55,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532974669] [2020-10-13 10:56:55,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:55,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:56:55,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888209372] [2020-10-13 10:56:55,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:56:55,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:56:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:55,489 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 5 states. [2020-10-13 10:56:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:55,657 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2020-10-13 10:56:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:55,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 10:56:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:55,660 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:56:55,660 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:56:55,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:56:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-13 10:56:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:56:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-10-13 10:56:55,677 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 22 [2020-10-13 10:56:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:55,677 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-10-13 10:56:55,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:56:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-10-13 10:56:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:56:55,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:55,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:55,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:56:55,683 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1687642270, now seen corresponding path program 1 times [2020-10-13 10:56:55,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:55,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814515860] [2020-10-13 10:56:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:55,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:55,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:55,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:56:55,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:55,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-13 10:56:55,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:55,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:56:55,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:56:55,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:55,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:56,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:56,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:56:56,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:56,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814515860] [2020-10-13 10:56:56,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:56,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:56,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106673285] [2020-10-13 10:56:56,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:56,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:56,027 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 6 states. [2020-10-13 10:56:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:56,110 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2020-10-13 10:56:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:56:56,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:56:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:56,111 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:56:56,111 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:56:56,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:56:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-13 10:56:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:56:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2020-10-13 10:56:56,122 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 22 [2020-10-13 10:56:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:56,123 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2020-10-13 10:56:56,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2020-10-13 10:56:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:56:56,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:56,126 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:56,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:56:56,126 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -203757609, now seen corresponding path program 2 times [2020-10-13 10:56:56,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:56,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787778544] [2020-10-13 10:56:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:56:56,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:56,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-13 10:56:56,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:56,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:56,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:56,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:56,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:56,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:56,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:56,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787778544] [2020-10-13 10:56:56,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:56,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:56,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353566793] [2020-10-13 10:56:56,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:56,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:56,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:56,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:56,536 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand 4 states. [2020-10-13 10:56:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:56,563 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-13 10:56:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:56,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 10:56:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:56,565 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:56:56,565 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:56:56,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 10:56:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:56:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:56:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:56:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2020-10-13 10:56:56,570 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 23 [2020-10-13 10:56:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:56,571 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2020-10-13 10:56:56,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2020-10-13 10:56:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:56:56,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:56,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:56,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:56:56,572 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:56,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1328064199, now seen corresponding path program 2 times [2020-10-13 10:56:56,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:56,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977099511] [2020-10-13 10:56:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:56:57,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:56:57,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-13 10:56:57,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:57,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:56:57,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:57,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:57,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:56:57,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977099511] [2020-10-13 10:56:57,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:57,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:57,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077873571] [2020-10-13 10:56:57,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:57,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:57,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:57,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:57,592 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand 6 states. [2020-10-13 10:56:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:57,687 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2020-10-13 10:56:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:57,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 10:56:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:57,689 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:56:57,689 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:56:57,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:56:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:56:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:56:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2020-10-13 10:56:57,693 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 23 [2020-10-13 10:56:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:57,694 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2020-10-13 10:56:57,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2020-10-13 10:56:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:56:57,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:57,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:57,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:56:57,695 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2095055766, now seen corresponding path program 3 times [2020-10-13 10:56:57,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:57,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899978687] [2020-10-13 10:56:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:58,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:56:58,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:58,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-13 10:56:58,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:58,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:58,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:58,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:58,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:58,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:58,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:58,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:58,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:58,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:56:58,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899978687] [2020-10-13 10:56:58,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:58,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:58,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007720133] [2020-10-13 10:56:58,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:58,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:58,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:58,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:58,355 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand 6 states. [2020-10-13 10:56:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:58,409 INFO L93 Difference]: Finished difference Result 82 states and 127 transitions. [2020-10-13 10:56:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:56:58,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 10:56:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:58,411 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:56:58,411 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:56:58,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:56:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 10:56:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:56:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2020-10-13 10:56:58,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 23 [2020-10-13 10:56:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:58,416 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2020-10-13 10:56:58,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2020-10-13 10:56:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:56:58,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:58,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:58,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:56:58,418 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:58,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1960585505, now seen corresponding path program 4 times [2020-10-13 10:56:58,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:58,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174272620] [2020-10-13 10:56:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:58,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:58,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:56:58,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:58,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-13 10:56:58,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:58,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:56:58,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:58,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:58,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:58,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:58,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:58,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:58,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:58,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:58,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:56:58,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174272620] [2020-10-13 10:56:58,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:58,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:56:58,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014338697] [2020-10-13 10:56:58,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:56:58,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:56:58,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:58,632 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand 5 states. [2020-10-13 10:56:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:58,703 INFO L93 Difference]: Finished difference Result 100 states and 140 transitions. [2020-10-13 10:56:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:58,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 10:56:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:58,705 INFO L225 Difference]: With dead ends: 100 [2020-10-13 10:56:58,705 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:56:58,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:56:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-10-13 10:56:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:56:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2020-10-13 10:56:58,710 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 24 [2020-10-13 10:56:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:58,711 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2020-10-13 10:56:58,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:56:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2020-10-13 10:56:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:56:58,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:58,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:58,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:56:58,712 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1184946631, now seen corresponding path program 5 times [2020-10-13 10:56:58,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:58,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748661365] [2020-10-13 10:56:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:58,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:00,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:57:00,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:00,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1362 [2020-10-13 10:57:00,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:57:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:57:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:57:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:00,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:00,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:00,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:00,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:00,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:00,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:57:00,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748661365] [2020-10-13 10:57:00,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:00,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:00,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532734742] [2020-10-13 10:57:00,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:00,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:00,189 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand 8 states. [2020-10-13 10:57:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:00,479 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2020-10-13 10:57:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:57:00,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 10:57:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:00,480 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:57:00,481 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:57:00,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:57:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:57:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 10:57:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:57:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2020-10-13 10:57:00,487 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 25 [2020-10-13 10:57:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:00,488 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2020-10-13 10:57:00,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2020-10-13 10:57:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:57:00,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:00,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:00,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:57:00,489 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1982615641, now seen corresponding path program 6 times [2020-10-13 10:57:00,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:00,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094266095] [2020-10-13 10:57:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:57:02,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2170 [2020-10-13 10:57:02,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:57:02,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:02,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:57:02,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:02,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:02,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:02,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:02,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:02,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:57:02,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094266095] [2020-10-13 10:57:02,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:02,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:02,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575272479] [2020-10-13 10:57:02,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:02,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:02,774 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand 8 states. [2020-10-13 10:57:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:03,029 INFO L93 Difference]: Finished difference Result 143 states and 204 transitions. [2020-10-13 10:57:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:57:03,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 10:57:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:03,031 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:57:03,031 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 10:57:03,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:57:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 10:57:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2020-10-13 10:57:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:57:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2020-10-13 10:57:03,040 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 25 [2020-10-13 10:57:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:03,040 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2020-10-13 10:57:03,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2020-10-13 10:57:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:57:03,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:03,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:03,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:57:03,041 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:03,042 INFO L82 PathProgramCache]: Analyzing trace with hash -731982783, now seen corresponding path program 3 times [2020-10-13 10:57:03,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:03,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788328138] [2020-10-13 10:57:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:03,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:57:03,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:03,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-13 10:57:03,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:03,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:57:03,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:57:03,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:57:03,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:03,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:03,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:03,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:03,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:03,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:03,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:03,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:03,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:03,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:03,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:57:03,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788328138] [2020-10-13 10:57:03,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:03,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:57:03,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304221950] [2020-10-13 10:57:03,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:57:03,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:57:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:57:03,310 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand 6 states. [2020-10-13 10:57:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:03,404 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2020-10-13 10:57:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:57:03,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 10:57:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:03,406 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:57:03,406 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:57:03,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:57:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:57:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2020-10-13 10:57:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:57:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2020-10-13 10:57:03,413 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 26 [2020-10-13 10:57:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:03,414 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2020-10-13 10:57:03,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:57:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2020-10-13 10:57:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:57:03,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:03,415 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:03,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:57:03,415 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2015666696, now seen corresponding path program 7 times [2020-10-13 10:57:03,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:03,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353532166] [2020-10-13 10:57:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:03,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:07,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:57:07,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:07,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3795 [2020-10-13 10:57:07,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:07,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:57:07,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:57:07,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:57:07,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:07,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:07,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:07,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:07,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:07,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:07,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:07,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:57:07,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353532166] [2020-10-13 10:57:07,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:07,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:57:07,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894547466] [2020-10-13 10:57:07,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:57:07,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:57:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:07,308 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand 7 states. [2020-10-13 10:57:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:07,385 INFO L93 Difference]: Finished difference Result 134 states and 190 transitions. [2020-10-13 10:57:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:57:07,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 10:57:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:07,387 INFO L225 Difference]: With dead ends: 134 [2020-10-13 10:57:07,387 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:57:07,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:57:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-10-13 10:57:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:57:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2020-10-13 10:57:07,395 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 27 [2020-10-13 10:57:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:07,395 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2020-10-13 10:57:07,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:57:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2020-10-13 10:57:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:57:07,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:07,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:07,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:57:07,396 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -576518495, now seen corresponding path program 4 times [2020-10-13 10:57:07,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:07,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628599246] [2020-10-13 10:57:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:07,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:57:07,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:07,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-13 10:57:07,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:57:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:57:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:57:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:07,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:07,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:07,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:07,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:07,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:57:07,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628599246] [2020-10-13 10:57:07,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:07,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:57:07,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250744240] [2020-10-13 10:57:07,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:57:07,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:57:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:07,732 INFO L87 Difference]: Start difference. First operand 115 states and 152 transitions. Second operand 7 states. [2020-10-13 10:57:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:07,829 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-10-13 10:57:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:57:07,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:57:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:07,832 INFO L225 Difference]: With dead ends: 141 [2020-10-13 10:57:07,832 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:57:07,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:57:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2020-10-13 10:57:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:57:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2020-10-13 10:57:07,841 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 28 [2020-10-13 10:57:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:07,842 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2020-10-13 10:57:07,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:57:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2020-10-13 10:57:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:57:07,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:07,843 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:07,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:57:07,843 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash 70004832, now seen corresponding path program 5 times [2020-10-13 10:57:07,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:07,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55888020] [2020-10-13 10:57:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:08,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:09,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:09,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:57:09,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:09,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2068 [2020-10-13 10:57:09,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:57:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:57:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:10,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:10,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:10,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:10,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:10,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:10,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:57:10,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55888020] [2020-10-13 10:57:10,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:10,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:57:10,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569915561] [2020-10-13 10:57:10,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:57:10,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:57:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:10,041 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand 9 states. [2020-10-13 10:57:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:10,341 INFO L93 Difference]: Finished difference Result 220 states and 302 transitions. [2020-10-13 10:57:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:57:10,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-13 10:57:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:10,344 INFO L225 Difference]: With dead ends: 220 [2020-10-13 10:57:10,344 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:57:10,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:57:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:57:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 138. [2020-10-13 10:57:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 10:57:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2020-10-13 10:57:10,355 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 28 [2020-10-13 10:57:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:10,355 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2020-10-13 10:57:10,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:57:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2020-10-13 10:57:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:57:10,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:10,356 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:10,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:57:10,357 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1191477528, now seen corresponding path program 8 times [2020-10-13 10:57:10,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:10,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449560854] [2020-10-13 10:57:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:11,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:11,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:57:11,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:11,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-13 10:57:11,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:11,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:57:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:57:11,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:11,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:11,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:11,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:11,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:11,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:11,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:11,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:11,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:11,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:57:11,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449560854] [2020-10-13 10:57:11,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:11,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:57:11,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818369780] [2020-10-13 10:57:11,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:57:11,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:11,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:57:11,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:11,455 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand 10 states. [2020-10-13 10:57:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:11,900 INFO L93 Difference]: Finished difference Result 186 states and 238 transitions. [2020-10-13 10:57:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:57:11,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-13 10:57:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:11,902 INFO L225 Difference]: With dead ends: 186 [2020-10-13 10:57:11,902 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 10:57:11,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:57:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 10:57:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-10-13 10:57:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 10:57:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 175 transitions. [2020-10-13 10:57:11,909 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 175 transitions. Word has length 29 [2020-10-13 10:57:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:11,910 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 175 transitions. [2020-10-13 10:57:11,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:57:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 175 transitions. [2020-10-13 10:57:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:57:11,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:11,911 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:11,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:57:11,911 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1442756377, now seen corresponding path program 6 times [2020-10-13 10:57:11,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:11,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062052315] [2020-10-13 10:57:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:11,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:11,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:12,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:14,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:14,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:57:14,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:14,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2262 [2020-10-13 10:57:14,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:14,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:57:14,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:57:14,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:57:14,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:14,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:14,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:14,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:14,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:14,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:14,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:14,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 10:57:14,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062052315] [2020-10-13 10:57:14,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:14,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:57:14,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349794859] [2020-10-13 10:57:14,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:57:14,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:14,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:57:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:57:14,250 INFO L87 Difference]: Start difference. First operand 132 states and 175 transitions. Second operand 6 states. [2020-10-13 10:57:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:14,335 INFO L93 Difference]: Finished difference Result 163 states and 219 transitions. [2020-10-13 10:57:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:57:14,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-13 10:57:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:14,337 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:57:14,337 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 10:57:14,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:57:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 10:57:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2020-10-13 10:57:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:57:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2020-10-13 10:57:14,344 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 29 [2020-10-13 10:57:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:14,345 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2020-10-13 10:57:14,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:57:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2020-10-13 10:57:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:57:14,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:14,346 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:14,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:57:14,346 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:14,346 INFO L82 PathProgramCache]: Analyzing trace with hash -885831850, now seen corresponding path program 9 times [2020-10-13 10:57:14,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:14,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561160925] [2020-10-13 10:57:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:14,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:15,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:15,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:57:15,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:15,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-13 10:57:15,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:15,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:57:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:57:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:57:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:16,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:16,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:16,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:16,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:16,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:16,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:16,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:57:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561160925] [2020-10-13 10:57:16,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:16,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:16,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751350303] [2020-10-13 10:57:16,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:16,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:16,083 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand 8 states. [2020-10-13 10:57:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:16,215 INFO L93 Difference]: Finished difference Result 191 states and 276 transitions. [2020-10-13 10:57:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:57:16,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 10:57:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:16,217 INFO L225 Difference]: With dead ends: 191 [2020-10-13 10:57:16,217 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 10:57:16,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 10:57:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 151. [2020-10-13 10:57:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:57:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 207 transitions. [2020-10-13 10:57:16,224 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 207 transitions. Word has length 29 [2020-10-13 10:57:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:16,225 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 207 transitions. [2020-10-13 10:57:16,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 207 transitions. [2020-10-13 10:57:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:57:16,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:16,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:16,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:57:16,227 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1029274942, now seen corresponding path program 7 times [2020-10-13 10:57:16,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:16,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940274829] [2020-10-13 10:57:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:57:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:57:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:16,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:16,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:16,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:16,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:16,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:16,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:16,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 10:57:16,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940274829] [2020-10-13 10:57:16,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:16,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:57:16,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932429174] [2020-10-13 10:57:16,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:57:16,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:57:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:16,597 INFO L87 Difference]: Start difference. First operand 151 states and 207 transitions. Second operand 7 states. [2020-10-13 10:57:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:16,742 INFO L93 Difference]: Finished difference Result 288 states and 399 transitions. [2020-10-13 10:57:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:57:16,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 10:57:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:16,745 INFO L225 Difference]: With dead ends: 288 [2020-10-13 10:57:16,745 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 10:57:16,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 10:57:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 175. [2020-10-13 10:57:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 10:57:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 233 transitions. [2020-10-13 10:57:16,754 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 233 transitions. Word has length 30 [2020-10-13 10:57:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:16,754 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 233 transitions. [2020-10-13 10:57:16,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:57:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 233 transitions. [2020-10-13 10:57:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:57:16,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:16,755 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:16,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:57:16,756 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1242210521, now seen corresponding path program 10 times [2020-10-13 10:57:16,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:16,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121284718] [2020-10-13 10:57:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:16,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:17,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:17,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:18,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:57:19,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:57:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:57:19,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:20,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:20,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:20,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:20,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:20,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:20,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:20,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:57:20,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121284718] [2020-10-13 10:57:20,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:20,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:57:20,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497927421] [2020-10-13 10:57:20,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:57:20,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:57:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:20,173 INFO L87 Difference]: Start difference. First operand 175 states and 233 transitions. Second operand 10 states. [2020-10-13 10:57:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:20,614 INFO L93 Difference]: Finished difference Result 206 states and 264 transitions. [2020-10-13 10:57:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:57:20,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-13 10:57:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:20,616 INFO L225 Difference]: With dead ends: 206 [2020-10-13 10:57:20,616 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:57:20,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:57:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:57:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-13 10:57:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:57:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 220 transitions. [2020-10-13 10:57:20,633 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 220 transitions. Word has length 31 [2020-10-13 10:57:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:20,633 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 220 transitions. [2020-10-13 10:57:20,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:57:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 220 transitions. [2020-10-13 10:57:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:57:20,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:20,634 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:20,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:57:20,635 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 475011879, now seen corresponding path program 11 times [2020-10-13 10:57:20,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:20,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534155793] [2020-10-13 10:57:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:20,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:20,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:20,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:25,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:25,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:57:25,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:57:25,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:57:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:57:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:57:25,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:25,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:25,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:25,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:25,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:57:25,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534155793] [2020-10-13 10:57:25,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:25,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:57:25,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942251478] [2020-10-13 10:57:25,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:57:25,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:57:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:25,773 INFO L87 Difference]: Start difference. First operand 169 states and 220 transitions. Second operand 9 states. [2020-10-13 10:57:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:25,912 INFO L93 Difference]: Finished difference Result 236 states and 330 transitions. [2020-10-13 10:57:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:57:25,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-13 10:57:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:25,916 INFO L225 Difference]: With dead ends: 236 [2020-10-13 10:57:25,916 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 10:57:25,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 10:57:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 191. [2020-10-13 10:57:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 10:57:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 251 transitions. [2020-10-13 10:57:25,926 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 251 transitions. Word has length 31 [2020-10-13 10:57:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:25,927 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 251 transitions. [2020-10-13 10:57:25,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:57:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 251 transitions. [2020-10-13 10:57:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:57:25,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:25,928 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:25,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:57:25,928 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -770080831, now seen corresponding path program 8 times [2020-10-13 10:57:25,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:25,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460111921] [2020-10-13 10:57:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:25,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:26,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:26,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:27,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:57:27,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:27,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-13 10:57:27,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:27,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:57:27,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:57:27,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:57:27,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:27,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:27,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:27,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:27,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:27,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:27,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:27,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:27,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:27,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:57:27,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460111921] [2020-10-13 10:57:27,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:27,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:27,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140329399] [2020-10-13 10:57:27,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:27,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:27,571 INFO L87 Difference]: Start difference. First operand 191 states and 251 transitions. Second operand 8 states. [2020-10-13 10:57:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:27,764 INFO L93 Difference]: Finished difference Result 213 states and 275 transitions. [2020-10-13 10:57:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:57:27,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:57:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:27,767 INFO L225 Difference]: With dead ends: 213 [2020-10-13 10:57:27,767 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 10:57:27,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 10:57:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-13 10:57:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 10:57:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2020-10-13 10:57:27,776 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 32 [2020-10-13 10:57:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:27,777 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2020-10-13 10:57:27,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2020-10-13 10:57:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:57:27,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:27,778 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:27,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:57:27,778 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:27,779 INFO L82 PathProgramCache]: Analyzing trace with hash 111270288, now seen corresponding path program 12 times [2020-10-13 10:57:27,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:27,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587389319] [2020-10-13 10:57:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:27,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:32,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:32,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:57:32,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:32,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:57:32,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:57:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:57:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:57:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:32,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:32,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:32,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:57:32,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587389319] [2020-10-13 10:57:32,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:32,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:57:32,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524241752] [2020-10-13 10:57:32,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:57:32,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:32,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:57:32,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:32,919 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand 10 states. [2020-10-13 10:57:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:33,100 INFO L93 Difference]: Finished difference Result 236 states and 337 transitions. [2020-10-13 10:57:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:57:33,101 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 10:57:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:33,103 INFO L225 Difference]: With dead ends: 236 [2020-10-13 10:57:33,103 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 10:57:33,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 10:57:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 186. [2020-10-13 10:57:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 10:57:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 248 transitions. [2020-10-13 10:57:33,112 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 248 transitions. Word has length 32 [2020-10-13 10:57:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:33,112 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 248 transitions. [2020-10-13 10:57:33,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:57:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 248 transitions. [2020-10-13 10:57:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:57:33,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:33,113 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:33,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:57:33,114 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash -20802423, now seen corresponding path program 9 times [2020-10-13 10:57:33,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:33,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966214265] [2020-10-13 10:57:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:33,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:57:36,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:36,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3451 [2020-10-13 10:57:36,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:57:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:57:36,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:36,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 10:57:36,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966214265] [2020-10-13 10:57:36,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:36,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:57:36,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938891032] [2020-10-13 10:57:36,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:57:36,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:57:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:36,695 INFO L87 Difference]: Start difference. First operand 186 states and 248 transitions. Second operand 11 states. [2020-10-13 10:57:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:37,041 INFO L93 Difference]: Finished difference Result 380 states and 508 transitions. [2020-10-13 10:57:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:57:37,042 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-13 10:57:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:37,043 INFO L225 Difference]: With dead ends: 380 [2020-10-13 10:57:37,043 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 10:57:37,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:57:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 10:57:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2020-10-13 10:57:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 10:57:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 287 transitions. [2020-10-13 10:57:37,062 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 287 transitions. Word has length 33 [2020-10-13 10:57:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:37,062 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 287 transitions. [2020-10-13 10:57:37,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:57:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 287 transitions. [2020-10-13 10:57:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:57:37,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:37,063 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:37,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:57:37,063 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1101509017, now seen corresponding path program 13 times [2020-10-13 10:57:37,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:37,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157021490] [2020-10-13 10:57:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:38,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:57:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:38,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:38,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:38,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:38,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:38,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:38,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:38,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:57:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157021490] [2020-10-13 10:57:38,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:38,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:57:38,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880287409] [2020-10-13 10:57:38,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:57:38,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:57:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:57:38,396 INFO L87 Difference]: Start difference. First operand 217 states and 287 transitions. Second operand 12 states. [2020-10-13 10:57:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:39,171 INFO L93 Difference]: Finished difference Result 285 states and 362 transitions. [2020-10-13 10:57:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:57:39,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-13 10:57:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:39,174 INFO L225 Difference]: With dead ends: 285 [2020-10-13 10:57:39,174 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 10:57:39,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:57:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 10:57:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 210. [2020-10-13 10:57:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 10:57:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 277 transitions. [2020-10-13 10:57:39,186 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 277 transitions. Word has length 33 [2020-10-13 10:57:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:39,187 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 277 transitions. [2020-10-13 10:57:39,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:57:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 277 transitions. [2020-10-13 10:57:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:39,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:39,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:39,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:57:39,188 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash -282349566, now seen corresponding path program 10 times [2020-10-13 10:57:39,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:39,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629409537] [2020-10-13 10:57:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:39,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:39,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:39,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:39,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:39,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-13 10:57:39,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:57:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:57:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:57:39,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:39,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:39,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:39,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:39,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:39,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:39,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 10:57:39,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629409537] [2020-10-13 10:57:39,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:39,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:39,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36179033] [2020-10-13 10:57:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:39,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:39,668 INFO L87 Difference]: Start difference. First operand 210 states and 277 transitions. Second operand 8 states. [2020-10-13 10:57:39,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:39,826 INFO L93 Difference]: Finished difference Result 293 states and 371 transitions. [2020-10-13 10:57:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:57:39,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-13 10:57:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:39,828 INFO L225 Difference]: With dead ends: 293 [2020-10-13 10:57:39,828 INFO L226 Difference]: Without dead ends: 267 [2020-10-13 10:57:39,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-13 10:57:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 205. [2020-10-13 10:57:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 10:57:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 274 transitions. [2020-10-13 10:57:39,839 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 274 transitions. Word has length 34 [2020-10-13 10:57:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:39,839 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 274 transitions. [2020-10-13 10:57:39,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 274 transitions. [2020-10-13 10:57:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:39,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:39,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:39,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:57:39,841 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash -942720159, now seen corresponding path program 11 times [2020-10-13 10:57:39,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:39,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539378613] [2020-10-13 10:57:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:40,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-13 10:57:40,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:57:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:57:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:57:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:40,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:40,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:40,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:40,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 10:57:40,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539378613] [2020-10-13 10:57:40,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:40,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:40,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361511256] [2020-10-13 10:57:40,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:40,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:40,298 INFO L87 Difference]: Start difference. First operand 205 states and 274 transitions. Second operand 8 states. [2020-10-13 10:57:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:40,477 INFO L93 Difference]: Finished difference Result 424 states and 570 transitions. [2020-10-13 10:57:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:57:40,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-13 10:57:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:40,482 INFO L225 Difference]: With dead ends: 424 [2020-10-13 10:57:40,482 INFO L226 Difference]: Without dead ends: 339 [2020-10-13 10:57:40,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-13 10:57:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 235. [2020-10-13 10:57:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-13 10:57:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 306 transitions. [2020-10-13 10:57:40,497 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 306 transitions. Word has length 34 [2020-10-13 10:57:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:40,498 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 306 transitions. [2020-10-13 10:57:40,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 306 transitions. [2020-10-13 10:57:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:40,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:40,499 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:40,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:57:40,499 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1866811294, now seen corresponding path program 12 times [2020-10-13 10:57:40,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:40,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318101298] [2020-10-13 10:57:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:44,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:44,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:57:44,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3679 [2020-10-13 10:57:44,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:57:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:57:44,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:57:44,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:44,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:44,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:44,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:44,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:44,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:44,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:44,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:44,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:44,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 10:57:44,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318101298] [2020-10-13 10:57:44,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:44,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:57:44,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046617813] [2020-10-13 10:57:44,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:57:44,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:57:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:44,256 INFO L87 Difference]: Start difference. First operand 235 states and 306 transitions. Second operand 7 states. [2020-10-13 10:57:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:44,361 INFO L93 Difference]: Finished difference Result 277 states and 368 transitions. [2020-10-13 10:57:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:57:44,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-13 10:57:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:44,363 INFO L225 Difference]: With dead ends: 277 [2020-10-13 10:57:44,363 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 10:57:44,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 10:57:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2020-10-13 10:57:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-13 10:57:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 324 transitions. [2020-10-13 10:57:44,384 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 324 transitions. Word has length 34 [2020-10-13 10:57:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:44,385 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 324 transitions. [2020-10-13 10:57:44,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:57:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 324 transitions. [2020-10-13 10:57:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:57:44,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:44,386 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:44,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:57:44,386 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2026105864, now seen corresponding path program 14 times [2020-10-13 10:57:44,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:44,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459565969] [2020-10-13 10:57:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:44,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:45,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:48,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4270 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:57:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:48,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:48,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:48,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:48,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:48,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:48,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:48,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 10:57:48,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459565969] [2020-10-13 10:57:48,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:48,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:57:48,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835802276] [2020-10-13 10:57:48,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:57:48,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:57:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:57:48,820 INFO L87 Difference]: Start difference. First operand 245 states and 324 transitions. Second operand 12 states. [2020-10-13 10:57:53,061 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-13 10:57:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:53,693 INFO L93 Difference]: Finished difference Result 296 states and 375 transitions. [2020-10-13 10:57:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:57:53,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-13 10:57:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:53,696 INFO L225 Difference]: With dead ends: 296 [2020-10-13 10:57:53,696 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 10:57:53,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:57:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 10:57:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-10-13 10:57:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-13 10:57:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 304 transitions. [2020-10-13 10:57:53,708 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 304 transitions. Word has length 35 [2020-10-13 10:57:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:53,709 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 304 transitions. [2020-10-13 10:57:53,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:57:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 304 transitions. [2020-10-13 10:57:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:57:53,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:53,710 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:53,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:57:53,710 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash 552830440, now seen corresponding path program 15 times [2020-10-13 10:57:53,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:53,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824119478] [2020-10-13 10:57:53,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:53,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:53,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:53,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:55,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:57:58,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:57:58,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:57:58,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:58,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:58,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:58,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:58,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:58,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:58,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:57:58,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824119478] [2020-10-13 10:57:58,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:58,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:57:58,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193197509] [2020-10-13 10:57:58,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:57:58,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:57:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:58,952 INFO L87 Difference]: Start difference. First operand 234 states and 304 transitions. Second operand 11 states. [2020-10-13 10:57:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:59,599 INFO L93 Difference]: Finished difference Result 326 states and 459 transitions. [2020-10-13 10:57:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:57:59,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-13 10:57:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:59,606 INFO L225 Difference]: With dead ends: 326 [2020-10-13 10:57:59,606 INFO L226 Difference]: Without dead ends: 303 [2020-10-13 10:57:59,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-13 10:57:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-13 10:57:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 10:57:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 340 transitions. [2020-10-13 10:57:59,627 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 340 transitions. Word has length 35 [2020-10-13 10:57:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:59,627 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 340 transitions. [2020-10-13 10:57:59,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:57:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 340 transitions. [2020-10-13 10:57:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:57:59,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:59,629 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:59,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:57:59,629 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:59,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1771321617, now seen corresponding path program 16 times [2020-10-13 10:57:59,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:59,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302424971] [2020-10-13 10:57:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:01,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:04,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:04,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:58:04,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:04,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:04,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:58:04,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302424971] [2020-10-13 10:58:04,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:04,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:58:04,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621456874] [2020-10-13 10:58:04,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:58:04,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:58:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:58:04,853 INFO L87 Difference]: Start difference. First operand 260 states and 340 transitions. Second operand 12 states. [2020-10-13 10:58:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:05,155 INFO L93 Difference]: Finished difference Result 358 states and 507 transitions. [2020-10-13 10:58:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:58:05,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 10:58:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:05,157 INFO L225 Difference]: With dead ends: 358 [2020-10-13 10:58:05,157 INFO L226 Difference]: Without dead ends: 335 [2020-10-13 10:58:05,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:58:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-13 10:58:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 286. [2020-10-13 10:58:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 10:58:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 376 transitions. [2020-10-13 10:58:05,170 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 376 transitions. Word has length 36 [2020-10-13 10:58:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:05,170 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 376 transitions. [2020-10-13 10:58:05,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:58:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 376 transitions. [2020-10-13 10:58:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:58:05,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:05,172 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:05,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:58:05,172 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 788868808, now seen corresponding path program 17 times [2020-10-13 10:58:05,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:05,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735974455] [2020-10-13 10:58:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:05,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:05,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:05,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:07,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:07,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:58:07,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:58:07,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2756 [2020-10-13 10:58:07,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:07,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:58:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:58:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:58:07,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:16,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:16,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:16,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:16,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:16,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:16,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 33 refuted. 3 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:58:16,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735974455] [2020-10-13 10:58:16,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:16,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:58:16,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28711091] [2020-10-13 10:58:16,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:58:16,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:58:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=147, Unknown=4, NotChecked=0, Total=182 [2020-10-13 10:58:16,899 INFO L87 Difference]: Start difference. First operand 286 states and 376 transitions. Second operand 14 states. [2020-10-13 10:58:22,115 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 56 [2020-10-13 10:58:25,519 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-13 10:58:38,006 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-13 10:58:45,602 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-13 10:59:07,644 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification that was a NOOP. DAG size: 59 [2020-10-13 10:59:24,026 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-13 10:59:34,906 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-13 10:59:42,310 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-13 10:59:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:43,077 INFO L93 Difference]: Finished difference Result 359 states and 462 transitions. [2020-10-13 10:59:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:59:43,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-13 10:59:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:43,080 INFO L225 Difference]: With dead ends: 359 [2020-10-13 10:59:43,080 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 10:59:43,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=147, Invalid=779, Unknown=4, NotChecked=0, Total=930 [2020-10-13 10:59:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 10:59:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 284. [2020-10-13 10:59:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 10:59:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 374 transitions. [2020-10-13 10:59:43,093 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 374 transitions. Word has length 37 [2020-10-13 10:59:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:43,094 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 374 transitions. [2020-10-13 10:59:43,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:59:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 374 transitions. [2020-10-13 10:59:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:59:43,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:43,095 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:43,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:59:43,095 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -805591352, now seen corresponding path program 18 times [2020-10-13 10:59:43,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:43,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33007506] [2020-10-13 10:59:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:59:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:59:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:59:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:48,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:48,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:48,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:48,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:48,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:59:48,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33007506] [2020-10-13 10:59:48,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:48,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:59:48,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182155035] [2020-10-13 10:59:48,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:59:48,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:59:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:59:48,435 INFO L87 Difference]: Start difference. First operand 284 states and 374 transitions. Second operand 13 states. [2020-10-13 10:59:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:48,743 INFO L93 Difference]: Finished difference Result 396 states and 565 transitions. [2020-10-13 10:59:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:59:48,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-13 10:59:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:48,746 INFO L225 Difference]: With dead ends: 396 [2020-10-13 10:59:48,746 INFO L226 Difference]: Without dead ends: 365 [2020-10-13 10:59:48,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:59:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-13 10:59:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 310. [2020-10-13 10:59:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 10:59:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 410 transitions. [2020-10-13 10:59:48,759 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 410 transitions. Word has length 37 [2020-10-13 10:59:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:48,760 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 410 transitions. [2020-10-13 10:59:48,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:59:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 410 transitions. [2020-10-13 10:59:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:48,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:48,761 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:48,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:59:48,761 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -769644160, now seen corresponding path program 13 times [2020-10-13 10:59:48,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:48,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673329363] [2020-10-13 10:59:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:48,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:53,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:59:53,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:53,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:53,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:53,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:53,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:53,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:53,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:53,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:53,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:53,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 10:59:53,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673329363] [2020-10-13 10:59:53,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:53,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:59:53,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341854545] [2020-10-13 10:59:53,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:59:53,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:53,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:59:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:53,877 INFO L87 Difference]: Start difference. First operand 310 states and 410 transitions. Second operand 8 states. [2020-10-13 10:59:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:54,106 INFO L93 Difference]: Finished difference Result 361 states and 485 transitions. [2020-10-13 10:59:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:59:54,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-13 10:59:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:54,109 INFO L225 Difference]: With dead ends: 361 [2020-10-13 10:59:54,109 INFO L226 Difference]: Without dead ends: 354 [2020-10-13 10:59:54,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-13 10:59:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 311. [2020-10-13 10:59:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-13 10:59:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 415 transitions. [2020-10-13 10:59:54,124 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 415 transitions. Word has length 38 [2020-10-13 10:59:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:54,124 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 415 transitions. [2020-10-13 10:59:54,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:59:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 415 transitions. [2020-10-13 10:59:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:54,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:54,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:54,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:59:54,127 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:54,128 INFO L82 PathProgramCache]: Analyzing trace with hash 575753762, now seen corresponding path program 14 times [2020-10-13 10:59:54,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:54,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834495663] [2020-10-13 10:59:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:59:54,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:54,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:54,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:54,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:54,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:54,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:54,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:54,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-13 10:59:54,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834495663] [2020-10-13 10:59:54,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:54,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:59:54,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7574531] [2020-10-13 10:59:54,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:59:54,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:59:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:54,877 INFO L87 Difference]: Start difference. First operand 311 states and 415 transitions. Second operand 9 states. [2020-10-13 10:59:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:55,142 INFO L93 Difference]: Finished difference Result 708 states and 918 transitions. [2020-10-13 10:59:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:59:55,144 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-13 10:59:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:55,148 INFO L225 Difference]: With dead ends: 708 [2020-10-13 10:59:55,148 INFO L226 Difference]: Without dead ends: 601 [2020-10-13 10:59:55,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-13 10:59:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 359. [2020-10-13 10:59:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-13 10:59:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 464 transitions. [2020-10-13 10:59:55,166 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 464 transitions. Word has length 38 [2020-10-13 10:59:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:55,168 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 464 transitions. [2020-10-13 10:59:55,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:59:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 464 transitions. [2020-10-13 10:59:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:59:55,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:55,172 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:55,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:59:55,172 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash 863573975, now seen corresponding path program 19 times [2020-10-13 10:59:55,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:55,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264242467] [2020-10-13 10:59:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 11:00:00,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 11:00:00,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:00:00,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:00:00,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:00,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:00:00,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:00,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:00,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 11:00:00,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264242467] [2020-10-13 11:00:00,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:00,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:00:00,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948475378] [2020-10-13 11:00:00,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:00:00,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:00,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:00:00,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:00,384 INFO L87 Difference]: Start difference. First operand 359 states and 464 transitions. Second operand 14 states. [2020-10-13 11:00:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:01,439 INFO L93 Difference]: Finished difference Result 725 states and 939 transitions. [2020-10-13 11:00:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:00:01,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-13 11:00:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:01,443 INFO L225 Difference]: With dead ends: 725 [2020-10-13 11:00:01,443 INFO L226 Difference]: Without dead ends: 407 [2020-10-13 11:00:01,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 11:00:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-13 11:00:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 386. [2020-10-13 11:00:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-13 11:00:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 492 transitions. [2020-10-13 11:00:01,459 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 492 transitions. Word has length 39 [2020-10-13 11:00:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:01,460 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 492 transitions. [2020-10-13 11:00:01,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:00:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 492 transitions. [2020-10-13 11:00:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:00:01,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:01,461 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:01,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 11:00:01,462 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:01,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:01,462 INFO L82 PathProgramCache]: Analyzing trace with hash 639095553, now seen corresponding path program 15 times [2020-10-13 11:00:01,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:01,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403326354] [2020-10-13 11:00:01,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:00:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 11:00:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:00:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:02,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:02,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:02,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:02,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:02,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:02,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:02,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 11:00:02,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403326354] [2020-10-13 11:00:02,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:02,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:00:02,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130991534] [2020-10-13 11:00:02,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:00:02,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:00:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:02,228 INFO L87 Difference]: Start difference. First operand 386 states and 492 transitions. Second operand 9 states. [2020-10-13 11:00:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:02,469 INFO L93 Difference]: Finished difference Result 559 states and 686 transitions. [2020-10-13 11:00:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:00:02,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-13 11:00:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:02,472 INFO L225 Difference]: With dead ends: 559 [2020-10-13 11:00:02,473 INFO L226 Difference]: Without dead ends: 528 [2020-10-13 11:00:02,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-13 11:00:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 379. [2020-10-13 11:00:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-13 11:00:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2020-10-13 11:00:02,487 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 40 [2020-10-13 11:00:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:02,488 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2020-10-13 11:00:02,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:00:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2020-10-13 11:00:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:00:02,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:02,489 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:02,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 11:00:02,489 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1129106192, now seen corresponding path program 20 times [2020-10-13 11:00:02,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:02,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064323601] [2020-10-13 11:00:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:02,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:00:07,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 11:00:07,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:00:07,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:00:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 11:00:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:00:07,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:07,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:07,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:07,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:07,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:07,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:07,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:07,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 11:00:07,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064323601] [2020-10-13 11:00:07,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:07,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:00:07,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233285355] [2020-10-13 11:00:07,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:00:07,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:00:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:07,771 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand 14 states. [2020-10-13 11:00:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:08,164 INFO L93 Difference]: Finished difference Result 512 states and 718 transitions. [2020-10-13 11:00:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:00:08,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 11:00:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:08,166 INFO L225 Difference]: With dead ends: 512 [2020-10-13 11:00:08,167 INFO L226 Difference]: Without dead ends: 485 [2020-10-13 11:00:08,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-13 11:00:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 414. [2020-10-13 11:00:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-13 11:00:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 537 transitions. [2020-10-13 11:00:08,181 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 537 transitions. Word has length 40 [2020-10-13 11:00:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:08,182 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 537 transitions. [2020-10-13 11:00:08,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:00:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 537 transitions. [2020-10-13 11:00:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:00:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:08,183 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:08,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 11:00:08,183 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1315529977, now seen corresponding path program 21 times [2020-10-13 11:00:08,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:08,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178151255] [2020-10-13 11:00:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:11,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:00:11,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:00:11,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3019 [2020-10-13 11:00:11,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:11,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:00:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 11:00:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:00:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:11,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 11:00:11,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178151255] [2020-10-13 11:00:11,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:11,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:00:11,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543293901] [2020-10-13 11:00:11,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:00:11,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:11,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:00:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:00:11,506 INFO L87 Difference]: Start difference. First operand 414 states and 537 transitions. Second operand 16 states. [2020-10-13 11:00:12,741 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-13 11:00:18,267 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 11:00:22,574 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-13 11:00:24,884 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-13 11:00:27,256 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 11:00:29,830 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-13 11:00:30,296 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 11:00:32,378 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 11:00:40,720 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-13 11:00:45,137 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-13 11:00:46,133 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 11:00:51,021 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-13 11:00:51,441 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-13 11:00:55,494 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-13 11:00:56,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:56,119 INFO L93 Difference]: Finished difference Result 513 states and 654 transitions. [2020-10-13 11:00:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 11:00:56,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-13 11:00:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:56,123 INFO L225 Difference]: With dead ends: 513 [2020-10-13 11:00:56,123 INFO L226 Difference]: Without dead ends: 430 [2020-10-13 11:00:56,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=621, Invalid=3284, Unknown=1, NotChecked=0, Total=3906 [2020-10-13 11:00:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-13 11:00:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 410. [2020-10-13 11:00:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-13 11:00:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 535 transitions. [2020-10-13 11:00:56,139 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 535 transitions. Word has length 41 [2020-10-13 11:00:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:56,139 INFO L479 AbstractCegarLoop]: Abstraction has 410 states and 535 transitions. [2020-10-13 11:00:56,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:00:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 535 transitions. [2020-10-13 11:00:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:00:56,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:56,140 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:56,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 11:00:56,141 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1923217639, now seen corresponding path program 22 times [2020-10-13 11:00:56,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:56,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413888438] [2020-10-13 11:00:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:56,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:57,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:57,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:01,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:01,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:01:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:01:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:01:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:01:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:01,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:01,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:01,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:01,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:01,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:01:01,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:01,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:01,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:01,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:01,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 11:01:01,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413888438] [2020-10-13 11:01:01,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:01,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:01:01,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403339499] [2020-10-13 11:01:01,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:01:01,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:01:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:01:01,403 INFO L87 Difference]: Start difference. First operand 410 states and 535 transitions. Second operand 16 states.