/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:18:21,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:18:21,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:18:21,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:18:21,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:18:21,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:18:21,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:18:21,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:18:21,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:18:21,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:18:21,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:18:21,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:18:21,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:18:21,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:18:21,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:18:21,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:18:21,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:18:21,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:18:21,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:18:21,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:18:21,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:18:21,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:18:21,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:18:21,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:18:21,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:18:21,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:18:21,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:18:21,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:18:21,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:18:21,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:18:21,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:18:21,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:18:21,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:18:21,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:18:21,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:18:21,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:18:21,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:18:21,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:18:21,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:18:21,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:18:21,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:18:21,107 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 05:18:21,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:18:21,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:18:21,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:18:21,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:18:21,131 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:18:21,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:18:21,132 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:18:21,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:18:21,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:18:21,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:18:21,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:18:21,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:18:21,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:18:21,136 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:18:21,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:18:21,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:18:21,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:18:21,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:18:21,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:18:21,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:18:21,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:18:21,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:18:21,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:18:21,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:18:21,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:18:21,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:18:21,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:18:21,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:18:21,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:18:21,140 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 05:18:21,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:18:21,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:18:21,485 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:18:21,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:18:21,487 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:18:21,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-13 05:18:21,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f12d058f/ec675b9b47ee4684a7ee28384eb74a1a/FLAG9c7e51928 [2020-10-13 05:18:21,992 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:18:21,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-13 05:18:22,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f12d058f/ec675b9b47ee4684a7ee28384eb74a1a/FLAG9c7e51928 [2020-10-13 05:18:22,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f12d058f/ec675b9b47ee4684a7ee28384eb74a1a [2020-10-13 05:18:22,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:18:22,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:18:22,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:18:22,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:18:22,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:18:22,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f8adb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22, skipping insertion in model container [2020-10-13 05:18:22,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:18:22,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:18:22,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:18:22,611 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:18:22,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:18:22,641 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:18:22,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22 WrapperNode [2020-10-13 05:18:22,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:18:22,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:18:22,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:18:22,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:18:22,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (1/1) ... [2020-10-13 05:18:22,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:18:22,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:18:22,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:18:22,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:18:22,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (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 05:18:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:18:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:18:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:18:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-13 05:18:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:18:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:18:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:18:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:18:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-10-13 05:18:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 05:18:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:18:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 05:18:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:18:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:18:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 05:18:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:18:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:18:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:18:23,183 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:18:23,184 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:18:23,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:18:23 BoogieIcfgContainer [2020-10-13 05:18:23,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:18:23,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:18:23,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:18:23,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:18:23,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:18:22" (1/3) ... [2020-10-13 05:18:23,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a548ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:18:23, skipping insertion in model container [2020-10-13 05:18:23,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:18:22" (2/3) ... [2020-10-13 05:18:23,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a548ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:18:23, skipping insertion in model container [2020-10-13 05:18:23,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:18:23" (3/3) ... [2020-10-13 05:18:23,197 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-10-13 05:18:23,206 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:18:23,214 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:18:23,226 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:18:23,246 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:18:23,246 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:18:23,247 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:18:23,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:18:23,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:18:23,247 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:18:23,247 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:18:23,247 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:18:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 05:18:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:18:23,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:23,274 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 05:18:23,274 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:23,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-10-13 05:18:23,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:23,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063947711] [2020-10-13 05:18:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:23,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:23,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:23,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:18:23,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:23,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-13 05:18:23,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:18:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:23,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:18:23,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:23,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:23,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:23,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:23,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:23,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:18:23,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:23,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:23,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:23,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:23,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:23,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:23,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:18:23,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:23,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 05:18:23,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:23,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:23,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:23,857 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 05:18:23,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063947711] [2020-10-13 05:18:23,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:18:23,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:18:23,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12831307] [2020-10-13 05:18:23,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:18:23,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:18:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:18:23,893 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-13 05:18:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:24,027 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-13 05:18:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:18:24,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 05:18:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:24,040 INFO L225 Difference]: With dead ends: 59 [2020-10-13 05:18:24,040 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:18:24,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 05:18:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:18:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-13 05:18:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:18:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 05:18:24,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-13 05:18:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:24,087 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 05:18:24,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:18:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 05:18:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:18:24,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:24,089 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 05:18:24,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:18:24,089 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-10-13 05:18:24,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:24,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001000343] [2020-10-13 05:18:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:18:24,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-13 05:18:24,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:18:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:18:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:18:24,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:18:24,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:24,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:24,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:18:24,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:18:24,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 05:18:24,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,366 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 05:18:24,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001000343] [2020-10-13 05:18:24,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:18:24,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:18:24,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447490137] [2020-10-13 05:18:24,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:18:24,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:18:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:18:24,370 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-13 05:18:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:24,495 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-13 05:18:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:18:24,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 05:18:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:24,498 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:18:24,498 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 05:18:24,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 05:18:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 05:18:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-10-13 05:18:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:18:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 05:18:24,512 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-13 05:18:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:24,513 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 05:18:24,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:18:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 05:18:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:18:24,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:24,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:24,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:18:24,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash 387293505, now seen corresponding path program 1 times [2020-10-13 05:18:24,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:24,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321547832] [2020-10-13 05:18:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:18:24,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:24,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-13 05:18:24,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:18:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:18:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:18:24,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:24,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:24,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:24,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:24,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:18:24,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:24,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:18:24,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:18:24,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:18:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:18:24,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:18:24,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321547832] [2020-10-13 05:18:24,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:18:24,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:18:24,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678207962] [2020-10-13 05:18:24,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:18:24,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:24,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:18:24,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:18:24,897 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-10-13 05:18:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:25,043 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 05:18:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:18:25,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 05:18:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:25,045 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:18:25,046 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:18:25,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:18:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:18:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 05:18:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:18:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 05:18:25,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2020-10-13 05:18:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:25,054 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 05:18:25,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:18:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 05:18:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:18:25,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:25,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:25,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:18:25,057 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 413319423, now seen corresponding path program 1 times [2020-10-13 05:18:25,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:25,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456730904] [2020-10-13 05:18:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:25,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:25,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:18:25,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:25,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-13 05:18:25,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:18:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:18:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:18:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:25,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:25,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:25,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:25,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:25,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:25,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:25,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:25,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:25,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 05:18:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 05:18:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:18:25,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456730904] [2020-10-13 05:18:25,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:25,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:18:25,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98918763] [2020-10-13 05:18:25,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:18:25,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:18:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:18:25,542 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 05:18:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:25,665 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-13 05:18:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:18:25,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 05:18:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:25,667 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:18:25,668 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:18:25,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:18:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:18:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2020-10-13 05:18:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:18:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-13 05:18:25,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2020-10-13 05:18:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:25,676 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-13 05:18:25,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:18:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-13 05:18:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:18:25,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:25,677 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, 1, 1, 1, 1, 1] [2020-10-13 05:18:25,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:18:25,678 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 519043560, now seen corresponding path program 2 times [2020-10-13 05:18:25,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:25,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828184354] [2020-10-13 05:18:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:26,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:18:26,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:26,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-13 05:18:26,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:26,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:18:26,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:18:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:18:26,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:26,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:26,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:26,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:26,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:26,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:26,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:26,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 05:18:26,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:26,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 05:18:26,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:26,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:26,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:26,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:26,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:18:26,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828184354] [2020-10-13 05:18:26,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:18:26,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:18:26,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131392804] [2020-10-13 05:18:26,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:18:26,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:18:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:18:26,226 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-10-13 05:18:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:26,322 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-13 05:18:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:18:26,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-13 05:18:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:26,324 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:18:26,324 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 05:18:26,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 05:18:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 05:18:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 05:18:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:18:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-13 05:18:26,330 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2020-10-13 05:18:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:26,330 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-13 05:18:26,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:18:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-13 05:18:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:18:26,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:26,332 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, 1, 1, 1, 1, 1] [2020-10-13 05:18:26,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:18:26,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -460789464, now seen corresponding path program 1 times [2020-10-13 05:18:26,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:26,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683501498] [2020-10-13 05:18:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:27,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:27,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:18:27,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:18:27,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-13 05:18:27,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:27,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:18:27,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:18:27,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:18:27,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:27,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:27,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:27,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:27,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:27,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:27,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:27,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:27,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:27,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:27,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:27,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:27,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 05:18:27,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:27,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 05:18:27,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:18:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:18:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:18:27,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:18:27,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683501498] [2020-10-13 05:18:27,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:27,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:18:27,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653683774] [2020-10-13 05:18:27,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:18:27,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:18:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:18:27,786 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-10-13 05:18:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:27,929 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 05:18:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:18:27,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 05:18:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:27,931 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:18:27,931 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 05:18:27,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:18:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 05:18:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 05:18:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:18:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 05:18:27,938 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2020-10-13 05:18:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:27,938 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 05:18:27,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:18:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 05:18:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:18:27,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:27,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:27,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:18:27,941 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash -40898518, now seen corresponding path program 2 times [2020-10-13 05:18:27,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:27,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118358810] [2020-10-13 05:18:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:27,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:28,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:28,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:30,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:32,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:18:32,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:18:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:18:32,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:18:32,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:18:32,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:18:32,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 05:18:33,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:33,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:33,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:33,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:33,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:33,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:33,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:33,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:33,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 05:18:33,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 05:18:33,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:18:33,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118358810] [2020-10-13 05:18:33,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:33,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:18:33,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899587238] [2020-10-13 05:18:33,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:18:33,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:18:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:18:33,086 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 7 states. [2020-10-13 05:18:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:33,238 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-13 05:18:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:18:33,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 05:18:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:33,240 INFO L225 Difference]: With dead ends: 67 [2020-10-13 05:18:33,240 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:18:33,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:18:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:18:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-13 05:18:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 05:18:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-13 05:18:33,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 30 [2020-10-13 05:18:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:33,248 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-13 05:18:33,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:18:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-13 05:18:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:18:33,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:33,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:33,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:18:33,249 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1961285915, now seen corresponding path program 3 times [2020-10-13 05:18:33,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:33,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104751160] [2020-10-13 05:18:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:33,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:38,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:18:38,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:18:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:18:38,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:18:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:18:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:18:38,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:38,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:38,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:38,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:38,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:38,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:38,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:38,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:38,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:38,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 05:18:38,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:38,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 05:18:38,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:18:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:18:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:18:38,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:18:38,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104751160] [2020-10-13 05:18:38,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:38,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:18:38,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141835132] [2020-10-13 05:18:38,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:18:38,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:18:38,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:18:38,432 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 8 states. [2020-10-13 05:18:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:38,666 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-13 05:18:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:18:38,667 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-13 05:18:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:38,668 INFO L225 Difference]: With dead ends: 66 [2020-10-13 05:18:38,668 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 05:18:38,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:18:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 05:18:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 05:18:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:18:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 05:18:38,685 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-10-13 05:18:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:38,686 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 05:18:38,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:18:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 05:18:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:18:38,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:38,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:38,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:18:38,691 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash -577379495, now seen corresponding path program 4 times [2020-10-13 05:18:38,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:38,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952823131] [2020-10-13 05:18:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:38,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:39,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:43,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:43,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:18:43,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:18:43,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:18:43,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:18:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:18:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:18:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:43,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:43,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:43,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:43,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:43,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:43,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:43,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:43,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:43,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:43,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:43,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:43,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 05:18:43,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 05:18:43,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:18:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:18:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:18:43,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:18:44,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952823131] [2020-10-13 05:18:44,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:44,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:18:44,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53593002] [2020-10-13 05:18:44,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:18:44,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:18:44,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:18:44,034 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 9 states. [2020-10-13 05:18:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:44,215 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 05:18:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:18:44,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 05:18:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:44,217 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:18:44,217 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 05:18:44,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:18:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 05:18:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 05:18:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:18:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 05:18:44,223 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-10-13 05:18:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:44,223 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 05:18:44,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:18:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 05:18:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:18:44,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:44,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:44,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:18:44,225 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:44,226 INFO L82 PathProgramCache]: Analyzing trace with hash -693414377, now seen corresponding path program 5 times [2020-10-13 05:18:44,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:44,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569125362] [2020-10-13 05:18:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:44,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:44,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:46,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:47,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:49,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:18:49,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:18:49,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:18:49,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:18:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:18:49,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:18:49,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:49,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:49,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:49,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:49,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:49,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:49,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:49,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:49,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 05:18:49,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:49,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 05:18:49,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:49,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:49,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:18:49,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569125362] [2020-10-13 05:18:49,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:49,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:18:49,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541396137] [2020-10-13 05:18:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:18:49,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:18:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:18:49,395 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-10-13 05:18:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:49,559 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-13 05:18:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:18:49,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 05:18:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:49,561 INFO L225 Difference]: With dead ends: 79 [2020-10-13 05:18:49,561 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:18:49,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:18:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:18:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2020-10-13 05:18:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:18:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-13 05:18:49,574 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 37 [2020-10-13 05:18:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:49,574 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-13 05:18:49,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:18:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-13 05:18:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:18:49,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:49,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:49,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:18:49,578 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1883312142, now seen corresponding path program 6 times [2020-10-13 05:18:49,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:49,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97663629] [2020-10-13 05:18:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:49,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:50,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:54,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:18:54,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:18:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:18:54,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:18:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:18:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:18:54,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:54,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:54,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:54,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:54,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:54,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:54,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:54,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:54,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:54,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:54,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:54,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 05:18:54,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:54,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 05:18:54,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:18:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:18:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:18:54,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:18:54,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97663629] [2020-10-13 05:18:54,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:54,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:18:54,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365778793] [2020-10-13 05:18:54,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:18:54,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:18:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:18:54,748 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 10 states. [2020-10-13 05:18:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:54,892 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-13 05:18:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:18:54,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 05:18:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:54,894 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:18:54,894 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:18:54,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:18:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:18:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 05:18:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 05:18:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-13 05:18:54,906 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-10-13 05:18:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:54,907 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-13 05:18:54,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:18:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-13 05:18:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:18:54,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:54,908 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:54,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:18:54,910 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:54,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1459903472, now seen corresponding path program 7 times [2020-10-13 05:18:54,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:54,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236708556] [2020-10-13 05:18:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:55,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:59,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:59,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:18:59,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:18:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:18:59,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:18:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 05:18:59,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:18:59,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:59,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:59,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:59,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:59,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:59,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:59,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:59,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:59,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:59,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:18:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:59,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:00,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 05:19:00,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 05:19:00,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:00,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:00,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:00,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:00,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:00,077 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 05:19:00,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236708556] [2020-10-13 05:19:00,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:00,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:19:00,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899789258] [2020-10-13 05:19:00,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:19:00,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:00,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:19:00,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:19:00,079 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 9 states. [2020-10-13 05:19:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:00,252 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-13 05:19:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:19:00,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 05:19:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:00,253 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:19:00,254 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:19:00,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:19:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:19:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-10-13 05:19:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:19:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-13 05:19:00,260 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 42 [2020-10-13 05:19:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:00,261 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-13 05:19:00,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:19:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-13 05:19:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:19:00,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:00,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:00,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:19:00,262 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -547171467, now seen corresponding path program 8 times [2020-10-13 05:19:00,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:00,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607852532] [2020-10-13 05:19:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:02,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:05,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:19:05,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:19:05,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:19:05,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:05,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:19:05,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:05,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:19:05,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:05,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:05,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:05,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:05,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:05,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:05,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:05,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:05,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:05,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:19:05,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 05:19:05,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607852532] [2020-10-13 05:19:05,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:05,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:19:05,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905446151] [2020-10-13 05:19:05,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:19:05,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:05,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:19:05,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:19:05,435 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 11 states. [2020-10-13 05:19:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:05,606 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-13 05:19:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:19:05,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 05:19:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:05,608 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:19:05,608 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 05:19:05,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:19:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 05:19:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 05:19:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:19:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 05:19:05,614 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2020-10-13 05:19:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:05,614 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 05:19:05,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:19:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 05:19:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:19:05,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:05,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:05,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:19:05,616 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1685163853, now seen corresponding path program 9 times [2020-10-13 05:19:05,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:05,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400113588] [2020-10-13 05:19:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:10,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:19:10,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:19:10,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:19:10,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:19:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:19:10,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:10,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:10,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:10,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:10,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:10,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:10,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:10,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:10,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:10,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:10,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:10,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:10,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:19:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 05:19:10,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400113588] [2020-10-13 05:19:10,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:10,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:19:10,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314988826] [2020-10-13 05:19:10,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:19:10,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:10,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:19:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:19:10,994 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 12 states. [2020-10-13 05:19:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:11,204 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-13 05:19:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:19:11,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-13 05:19:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:11,206 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:19:11,206 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:19:11,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:19:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:19:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 05:19:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:19:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-13 05:19:11,216 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2020-10-13 05:19:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:11,216 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-13 05:19:11,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:19:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-13 05:19:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:19:11,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:11,218 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:11,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:19:11,219 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash -79186319, now seen corresponding path program 10 times [2020-10-13 05:19:11,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:11,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949446836] [2020-10-13 05:19:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:19:16,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:16,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:16,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:16,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:16,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:16,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:16,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:16,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:16,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:16,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:19:16,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949446836] [2020-10-13 05:19:16,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:16,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:19:16,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735099295] [2020-10-13 05:19:16,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:19:16,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:19:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:19:16,389 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 10 states. [2020-10-13 05:19:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:16,583 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-13 05:19:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:19:16,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-13 05:19:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:16,585 INFO L225 Difference]: With dead ends: 101 [2020-10-13 05:19:16,585 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 05:19:16,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:19:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 05:19:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-10-13 05:19:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:19:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-13 05:19:16,592 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 49 [2020-10-13 05:19:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:16,592 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-13 05:19:16,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:19:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-13 05:19:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:19:16,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:16,594 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:16,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:19:16,594 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -504260236, now seen corresponding path program 11 times [2020-10-13 05:19:16,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:16,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824246873] [2020-10-13 05:19:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:16,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:19:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:19:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:21,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:21,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:21,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:21,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:21,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:19:21,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:21,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:21,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:21,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:21,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:21,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:21,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:19:21,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 05:19:22,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824246873] [2020-10-13 05:19:22,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:22,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:19:22,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493963216] [2020-10-13 05:19:22,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:19:22,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:19:22,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:19:22,008 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 13 states. [2020-10-13 05:19:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:22,222 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-13 05:19:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:19:22,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 05:19:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:22,224 INFO L225 Difference]: With dead ends: 94 [2020-10-13 05:19:22,224 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:19:22,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:19:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:19:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 05:19:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:19:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-13 05:19:22,229 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-10-13 05:19:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:22,230 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-13 05:19:22,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:19:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-13 05:19:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:19:22,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:22,231 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:22,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:19:22,231 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1886665334, now seen corresponding path program 12 times [2020-10-13 05:19:22,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:22,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946991777] [2020-10-13 05:19:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:27,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:19:27,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:19:27,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:19:27,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:19:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:27,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:19:27,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:27,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:27,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:27,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:27,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:27,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:19:27,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 05:19:27,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946991777] [2020-10-13 05:19:27,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:27,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:19:27,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270705026] [2020-10-13 05:19:27,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:19:27,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:27,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:19:27,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:19:27,690 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 14 states. [2020-10-13 05:19:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:27,903 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-13 05:19:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:19:27,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 05:19:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:27,905 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:19:27,905 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:19:27,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:19:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:19:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 05:19:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:19:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-13 05:19:27,911 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-10-13 05:19:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:27,911 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-13 05:19:27,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:19:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-13 05:19:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:19:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:27,912 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:27,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:19:27,912 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1758634744, now seen corresponding path program 13 times [2020-10-13 05:19:27,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:27,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782709009] [2020-10-13 05:19:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:29,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:32,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:19:32,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:19:32,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:19:32,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:19:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 05:19:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:19:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:33,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:33,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:33,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:33,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:33,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:33,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:33,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:33,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:33,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:33,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 05:19:33,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:33,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-13 05:19:33,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:33,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 05:19:33,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782709009] [2020-10-13 05:19:33,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:33,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:19:33,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365374356] [2020-10-13 05:19:33,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:19:33,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:19:33,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:19:33,275 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 11 states. [2020-10-13 05:19:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:33,485 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-10-13 05:19:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:19:33,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-13 05:19:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:33,486 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:19:33,486 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 05:19:33,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:19:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 05:19:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2020-10-13 05:19:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:19:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 05:19:33,495 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2020-10-13 05:19:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:33,495 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 05:19:33,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:19:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 05:19:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:19:33,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:33,496 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:33,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:19:33,497 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2074905485, now seen corresponding path program 14 times [2020-10-13 05:19:33,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:33,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879534260] [2020-10-13 05:19:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:33,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:19:38,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:38,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:38,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:38,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:38,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:38,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:38,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 05:19:38,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:38,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-13 05:19:38,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:19:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:19:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 05:19:39,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879534260] [2020-10-13 05:19:39,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:39,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:19:39,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068418213] [2020-10-13 05:19:39,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:19:39,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:39,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:19:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:19:39,251 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 15 states. [2020-10-13 05:19:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:39,480 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-13 05:19:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:19:39,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 05:19:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:39,481 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:19:39,482 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:19:39,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:19:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:19:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 05:19:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:19:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-13 05:19:39,492 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2020-10-13 05:19:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:39,492 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-13 05:19:39,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:19:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-13 05:19:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:19:39,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:39,498 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:39,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:19:39,499 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1675961419, now seen corresponding path program 15 times [2020-10-13 05:19:39,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:39,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621127156] [2020-10-13 05:19:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:39,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:44,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:19:44,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:19:44,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:19:44,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:19:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 05:19:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:19:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:44,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:44,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:44,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:44,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:44,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:44,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:44,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:44,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:44,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:19:44,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:44,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-13 05:19:44,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:44,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 05:19:44,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621127156] [2020-10-13 05:19:44,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:44,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:19:44,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080788446] [2020-10-13 05:19:44,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:19:44,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:44,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:19:44,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:19:44,863 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 12 states. [2020-10-13 05:19:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:45,099 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-13 05:19:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:19:45,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 05:19:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:45,101 INFO L225 Difference]: With dead ends: 123 [2020-10-13 05:19:45,101 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 05:19:45,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:19:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 05:19:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 69. [2020-10-13 05:19:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:19:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-13 05:19:45,108 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2020-10-13 05:19:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:45,108 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-13 05:19:45,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:19:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-13 05:19:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:19:45,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:45,109 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:45,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:19:45,110 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash 170141018, now seen corresponding path program 16 times [2020-10-13 05:19:45,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:45,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532707060] [2020-10-13 05:19:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:50,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:19:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:50,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:50,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:50,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:50,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:19:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 05:19:50,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532707060] [2020-10-13 05:19:50,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:50,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:19:50,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059231178] [2020-10-13 05:19:50,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:19:50,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:19:50,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:19:50,688 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 16 states. [2020-10-13 05:19:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:50,925 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-13 05:19:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:19:50,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-13 05:19:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:50,926 INFO L225 Difference]: With dead ends: 112 [2020-10-13 05:19:50,926 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 05:19:50,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:19:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 05:19:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 05:19:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:19:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-13 05:19:50,932 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-10-13 05:19:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:50,932 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-13 05:19:50,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:19:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-13 05:19:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:19:50,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:50,933 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:50,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:19:50,933 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 700666716, now seen corresponding path program 17 times [2020-10-13 05:19:50,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:50,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593980755] [2020-10-13 05:19:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:55,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:55,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:19:55,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:55,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:55,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:55,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:55,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:55,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:55,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:55,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:55,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:55,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:19:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:55,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:19:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 05:19:56,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593980755] [2020-10-13 05:19:56,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:56,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:19:56,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890972546] [2020-10-13 05:19:56,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:19:56,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:19:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:19:56,578 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 17 states. [2020-10-13 05:19:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:56,848 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-13 05:19:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:19:56,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-13 05:19:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:56,851 INFO L225 Difference]: With dead ends: 114 [2020-10-13 05:19:56,852 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:19:56,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:19:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:19:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 05:19:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:19:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-13 05:19:56,858 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-10-13 05:19:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:56,858 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-13 05:19:56,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:19:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-13 05:19:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:19:56,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:56,859 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:56,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:19:56,860 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -565245730, now seen corresponding path program 18 times [2020-10-13 05:19:56,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:56,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885292046] [2020-10-13 05:19:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:00,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:00,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:00,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:20:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 05:20:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:20:01,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:01,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:01,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:01,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:01,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:01,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:01,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:02,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:02,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:02,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:02,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 05:20:02,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885292046] [2020-10-13 05:20:02,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:02,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:20:02,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068273335] [2020-10-13 05:20:02,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:20:02,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:20:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:20:02,172 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 13 states. [2020-10-13 05:20:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:02,407 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2020-10-13 05:20:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:20:02,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-13 05:20:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:02,409 INFO L225 Difference]: With dead ends: 135 [2020-10-13 05:20:02,409 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 05:20:02,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:20:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 05:20:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 76. [2020-10-13 05:20:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:20:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 05:20:02,417 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 68 [2020-10-13 05:20:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:02,417 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 05:20:02,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:20:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 05:20:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:20:02,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:02,418 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:02,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:20:02,419 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1929548775, now seen corresponding path program 19 times [2020-10-13 05:20:02,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:02,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422434742] [2020-10-13 05:20:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:02,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:20:07,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:20:07,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:20:07,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:07,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:07,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:20:07,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:20:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:20:07,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 05:20:07,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422434742] [2020-10-13 05:20:07,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:07,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:20:07,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138057752] [2020-10-13 05:20:07,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:20:07,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:07,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:20:07,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:20:07,827 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 18 states. [2020-10-13 05:20:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:08,073 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-10-13 05:20:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:20:08,073 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-10-13 05:20:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:08,074 INFO L225 Difference]: With dead ends: 122 [2020-10-13 05:20:08,074 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:20:08,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:20:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:20:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 05:20:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:20:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-13 05:20:08,084 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2020-10-13 05:20:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:08,084 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-13 05:20:08,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:20:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-13 05:20:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:20:08,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:08,085 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:08,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:20:08,085 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1739194459, now seen corresponding path program 20 times [2020-10-13 05:20:08,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:08,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579153305] [2020-10-13 05:20:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:08,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:13,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:20:13,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:20:13,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 05:20:13,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:13,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:20:13,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 05:20:13,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:20:13,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:20:13,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:13,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:13,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:13,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:13,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:13,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:13,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:13,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:20:13,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:13,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-13 05:20:13,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 05:20:13,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579153305] [2020-10-13 05:20:13,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:13,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:20:13,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813827219] [2020-10-13 05:20:13,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:20:13,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:20:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:20:13,696 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 14 states. [2020-10-13 05:20:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:14,020 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2020-10-13 05:20:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:20:14,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-13 05:20:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:14,022 INFO L225 Difference]: With dead ends: 145 [2020-10-13 05:20:14,023 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:20:14,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:20:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:20:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-10-13 05:20:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:20:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-13 05:20:14,036 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 73 [2020-10-13 05:20:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:14,037 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-13 05:20:14,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:20:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-13 05:20:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:20:14,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:14,038 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:14,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:20:14,038 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1553312832, now seen corresponding path program 21 times [2020-10-13 05:20:14,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:14,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496057786] [2020-10-13 05:20:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:14,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:19,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:20:19,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:20:19,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:20:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:20:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:20:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:19,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:19,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:19,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:19,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:19,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:19,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:19,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:19,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:20:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:20:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:20:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 05:20:19,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496057786] [2020-10-13 05:20:19,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:19,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:20:19,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645039733] [2020-10-13 05:20:19,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:20:19,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:20:19,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:20:19,518 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 19 states. [2020-10-13 05:20:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:19,704 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-13 05:20:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:20:19,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-13 05:20:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:19,705 INFO L225 Difference]: With dead ends: 130 [2020-10-13 05:20:19,706 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:20:19,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:20:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:20:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 05:20:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:20:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-13 05:20:19,712 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-10-13 05:20:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:19,713 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-13 05:20:19,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:20:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-13 05:20:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:20:19,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:19,714 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:19,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:20:19,714 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1262842174, now seen corresponding path program 22 times [2020-10-13 05:20:19,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:19,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740445413] [2020-10-13 05:20:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:19,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:20,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:24,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:20:24,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:24,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:20:24,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:24,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:20:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:20:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:20:24,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:24,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:24,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:24,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:20:24,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:20:24,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:20:24,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 05:20:25,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740445413] [2020-10-13 05:20:25,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:25,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:20:25,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721811789] [2020-10-13 05:20:25,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:20:25,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:20:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:20:25,236 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 20 states. [2020-10-13 05:20:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:25,452 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-13 05:20:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:20:25,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-13 05:20:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:25,454 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:20:25,454 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 05:20:25,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:20:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 05:20:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 05:20:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:20:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-13 05:20:25,460 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-10-13 05:20:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:25,461 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-13 05:20:25,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:20:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-13 05:20:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 05:20:25,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:25,462 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:25,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:20:25,462 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1293414076, now seen corresponding path program 23 times [2020-10-13 05:20:25,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:25,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340121650] [2020-10-13 05:20:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:25,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:25,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 05:20:30,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:20:30,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:30,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:30,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:30,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:30,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:30,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:30,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:30,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 05:20:30,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340121650] [2020-10-13 05:20:30,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:30,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:20:30,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107769189] [2020-10-13 05:20:30,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:20:30,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:20:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:20:30,875 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 15 states. [2020-10-13 05:20:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:31,196 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-10-13 05:20:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:20:31,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-10-13 05:20:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:31,201 INFO L225 Difference]: With dead ends: 157 [2020-10-13 05:20:31,201 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 05:20:31,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 05:20:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 88. [2020-10-13 05:20:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:20:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-13 05:20:31,209 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 80 [2020-10-13 05:20:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:31,209 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-13 05:20:31,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:20:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-13 05:20:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:20:31,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:31,210 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:31,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:20:31,211 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1348802111, now seen corresponding path program 24 times [2020-10-13 05:20:31,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:31,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516387303] [2020-10-13 05:20:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:31,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:31,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:31,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:20:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:20:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:20:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:36,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:36,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:36,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:20:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:20:36,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 05:20:36,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516387303] [2020-10-13 05:20:36,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:36,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:20:36,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321529301] [2020-10-13 05:20:36,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:20:36,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:36,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:20:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:20:36,810 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 21 states. [2020-10-13 05:20:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:37,024 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-13 05:20:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:20:37,025 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-10-13 05:20:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:37,026 INFO L225 Difference]: With dead ends: 140 [2020-10-13 05:20:37,026 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:20:37,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:20:37,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:20:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-13 05:20:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:20:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-13 05:20:37,032 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 83 [2020-10-13 05:20:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:37,032 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-13 05:20:37,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:20:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-13 05:20:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 05:20:37,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:37,033 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:37,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:20:37,034 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 962898047, now seen corresponding path program 25 times [2020-10-13 05:20:37,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:37,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747194981] [2020-10-13 05:20:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:38,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:39,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 05:20:42,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:42,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:42,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:42,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:42,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:42,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:20:42,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-13 05:20:42,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:42,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:42,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:42,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 05:20:42,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747194981] [2020-10-13 05:20:42,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:42,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:20:42,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448122532] [2020-10-13 05:20:42,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:20:42,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:20:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:42,487 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 16 states. [2020-10-13 05:20:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:42,774 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2020-10-13 05:20:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:20:42,776 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-10-13 05:20:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:42,778 INFO L225 Difference]: With dead ends: 167 [2020-10-13 05:20:42,778 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 05:20:42,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 05:20:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 93. [2020-10-13 05:20:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 05:20:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-13 05:20:42,786 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 85 [2020-10-13 05:20:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:42,786 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-13 05:20:42,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:20:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-13 05:20:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 05:20:42,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:42,787 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:42,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:20:42,788 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 207471782, now seen corresponding path program 26 times [2020-10-13 05:20:42,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:42,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669453012] [2020-10-13 05:20:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:44,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:44,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:47,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:20:47,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:47,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:47,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:47,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:47,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:47,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:47,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:48,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:20:48,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:48,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-13 05:20:48,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:20:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:20:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:20:48,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:20:48,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669453012] [2020-10-13 05:20:48,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:48,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:20:48,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449345471] [2020-10-13 05:20:48,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:20:48,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:20:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:20:48,868 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 22 states. [2020-10-13 05:20:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:49,170 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-13 05:20:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:20:49,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-13 05:20:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:49,171 INFO L225 Difference]: With dead ends: 148 [2020-10-13 05:20:49,171 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:20:49,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:20:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:20:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 05:20:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 05:20:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-13 05:20:49,178 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-10-13 05:20:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:49,178 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-13 05:20:49,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:20:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-13 05:20:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:20:49,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:49,180 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:49,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:20:49,180 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1254912856, now seen corresponding path program 27 times [2020-10-13 05:20:49,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:49,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346505985] [2020-10-13 05:20:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:50,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:54,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:54,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:20:54,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:54,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:54,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:54,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:54,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:54,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:54,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:54,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:20:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:54,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:54,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:20:54,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 05:20:54,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:54,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:20:54,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:20:54,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:20:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:20:54,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346505985] [2020-10-13 05:20:54,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:54,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:20:54,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310031680] [2020-10-13 05:20:54,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:20:54,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:54,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:20:54,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:20:54,898 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 23 states. [2020-10-13 05:20:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:55,160 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2020-10-13 05:20:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:20:55,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-13 05:20:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:55,162 INFO L225 Difference]: With dead ends: 150 [2020-10-13 05:20:55,162 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 05:20:55,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:20:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 05:20:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 05:20:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:20:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 05:20:55,169 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-10-13 05:20:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:55,169 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 05:20:55,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:20:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 05:20:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 05:20:55,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:55,171 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:55,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:20:55,171 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2142723114, now seen corresponding path program 28 times [2020-10-13 05:20:55,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:55,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773633336] [2020-10-13 05:20:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:55,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:55,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:57,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:00,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 05:21:00,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:21:00,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:21:00,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:00,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:21:00,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:00,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:00,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:00,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:00,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:00,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:00,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:21:00,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:00,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-13 05:21:00,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:00,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:21:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:21:00,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:21:00,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773633336] [2020-10-13 05:21:00,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:00,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:21:00,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803249919] [2020-10-13 05:21:00,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:21:00,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:21:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:21:00,949 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 24 states. [2020-10-13 05:21:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:01,230 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-10-13 05:21:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:21:01,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 92 [2020-10-13 05:21:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:01,232 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:21:01,232 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 05:21:01,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 05:21:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 05:21:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 05:21:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-13 05:21:01,240 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-10-13 05:21:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:01,240 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-13 05:21:01,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:21:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-13 05:21:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 05:21:01,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:01,242 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:01,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:21:01,242 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1199221972, now seen corresponding path program 29 times [2020-10-13 05:21:01,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:01,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552296860] [2020-10-13 05:21:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:01,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:03,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:06,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 05:21:06,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:21:06,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5604 [2020-10-13 05:21:06,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:21:06,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:06,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:21:06,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:06,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:06,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:06,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:06,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:06,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:06,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:06,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:06,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:07,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:07,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:21:07,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:07,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-13 05:21:07,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:21:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:21:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:21:08,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552296860] [2020-10-13 05:21:08,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:08,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:21:08,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496620210] [2020-10-13 05:21:08,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:21:08,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:21:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:08,190 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 25 states. [2020-10-13 05:21:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:08,526 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-13 05:21:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:21:08,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2020-10-13 05:21:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:08,527 INFO L225 Difference]: With dead ends: 154 [2020-10-13 05:21:08,528 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 05:21:08,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:21:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 05:21:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 05:21:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 05:21:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-13 05:21:08,534 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-10-13 05:21:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:08,535 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-13 05:21:08,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:21:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-13 05:21:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 05:21:08,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:08,536 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:08,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:21:08,537 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash -172912210, now seen corresponding path program 30 times [2020-10-13 05:21:08,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:08,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167488222] [2020-10-13 05:21:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:08,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:11,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:13,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:21:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:13,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:13,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:13,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:13,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:14,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:14,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:21:14,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:21:14,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-13 05:21:14,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 05:21:14,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167488222] [2020-10-13 05:21:14,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:14,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:21:14,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608848027] [2020-10-13 05:21:14,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:21:14,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:21:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:21:14,207 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 17 states. [2020-10-13 05:21:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:14,519 INFO L93 Difference]: Finished difference Result 183 states and 214 transitions. [2020-10-13 05:21:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:21:14,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-13 05:21:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:14,522 INFO L225 Difference]: With dead ends: 183 [2020-10-13 05:21:14,522 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 05:21:14,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 05:21:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 104. [2020-10-13 05:21:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 05:21:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-13 05:21:14,530 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 96 [2020-10-13 05:21:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:14,530 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-13 05:21:14,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:21:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-13 05:21:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 05:21:14,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:14,532 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:14,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:21:14,532 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash -963536617, now seen corresponding path program 31 times [2020-10-13 05:21:14,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:14,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376266153] [2020-10-13 05:21:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:14,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:18,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:19,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:21:19,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:19,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:19,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:19,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:19,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:19,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:19,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:19,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:19,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:21:20,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 05:21:21,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376266153] [2020-10-13 05:21:21,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:21,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:21:21,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968015534] [2020-10-13 05:21:21,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:21:21,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:21:21,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:21,028 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 26 states. [2020-10-13 05:21:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:21,304 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2020-10-13 05:21:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:21:21,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2020-10-13 05:21:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:21,306 INFO L225 Difference]: With dead ends: 162 [2020-10-13 05:21:21,306 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 05:21:21,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:21:21,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 05:21:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 05:21:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 05:21:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-13 05:21:21,314 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 99 [2020-10-13 05:21:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:21,315 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-13 05:21:21,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:21:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-13 05:21:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:21:21,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:21,317 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:21,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:21:21,318 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1892541483, now seen corresponding path program 32 times [2020-10-13 05:21:21,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:21,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714187671] [2020-10-13 05:21:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:21,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:25,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5895 [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:21:27,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:27,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:27,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:27,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:21:27,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:27,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:27,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:27,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:21:27,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 05:21:28,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714187671] [2020-10-13 05:21:28,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:28,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:21:28,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408958756] [2020-10-13 05:21:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:21:28,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:28,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:21:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:28,866 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 27 states. [2020-10-13 05:21:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:29,192 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-10-13 05:21:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:21:29,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2020-10-13 05:21:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:29,194 INFO L225 Difference]: With dead ends: 164 [2020-10-13 05:21:29,194 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:21:29,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:21:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:21:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 05:21:29,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 05:21:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-13 05:21:29,201 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2020-10-13 05:21:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:29,201 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-13 05:21:29,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:21:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-13 05:21:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 05:21:29,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:29,203 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:29,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:21:29,203 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1313020141, now seen corresponding path program 33 times [2020-10-13 05:21:29,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:29,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897917483] [2020-10-13 05:21:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:29,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:34,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:34,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 05:21:34,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:34,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5264 [2020-10-13 05:21:34,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:34,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:21:34,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:34,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:21:34,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:34,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:34,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:34,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:34,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:34,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:34,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:34,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:34,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:34,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:34,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:35,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:35,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:21:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 05:21:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897917483] [2020-10-13 05:21:35,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:35,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:21:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666682911] [2020-10-13 05:21:35,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:21:35,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:21:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:21:35,584 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 28 states. [2020-10-13 05:21:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:35,923 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-10-13 05:21:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:21:35,923 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2020-10-13 05:21:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:35,925 INFO L225 Difference]: With dead ends: 166 [2020-10-13 05:21:35,925 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 05:21:35,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=588, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:21:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 05:21:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 05:21:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 05:21:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-13 05:21:35,931 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2020-10-13 05:21:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:35,932 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-13 05:21:35,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:21:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-13 05:21:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 05:21:35,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:35,933 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:35,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:21:35,933 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1556208337, now seen corresponding path program 34 times [2020-10-13 05:21:35,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:35,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728868269] [2020-10-13 05:21:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:36,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:37,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:42,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6322 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:21:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:42,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:42,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:42,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:42,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:42,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:42,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:42,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:42,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:42,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:42,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:21:42,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-13 05:21:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:21:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:21:42,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 05:21:43,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728868269] [2020-10-13 05:21:43,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:43,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:21:43,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732278982] [2020-10-13 05:21:43,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:21:43,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:21:43,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:21:43,501 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 29 states. [2020-10-13 05:21:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:43,734 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2020-10-13 05:21:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:21:43,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 105 [2020-10-13 05:21:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:43,736 INFO L225 Difference]: With dead ends: 168 [2020-10-13 05:21:43,736 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 05:21:43,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:21:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 05:21:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 05:21:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 05:21:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 05:21:43,742 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2020-10-13 05:21:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:43,743 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 05:21:43,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:21:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 05:21:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 05:21:43,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:43,744 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:43,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:21:43,745 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771663, now seen corresponding path program 35 times [2020-10-13 05:21:43,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:43,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262598405] [2020-10-13 05:21:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:43,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:50,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 05:21:50,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:50,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6994 [2020-10-13 05:21:50,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:50,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:21:50,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 05:21:50,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:21:50,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:50,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:50,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:50,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:50,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:50,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:21:51,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 05:21:51,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262598405] [2020-10-13 05:21:51,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:51,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:21:51,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686395412] [2020-10-13 05:21:51,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:21:51,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:51,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:21:51,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:51,628 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 18 states. [2020-10-13 05:21:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:52,006 INFO L93 Difference]: Finished difference Result 199 states and 232 transitions. [2020-10-13 05:21:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:21:52,007 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-10-13 05:21:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:52,008 INFO L225 Difference]: With dead ends: 199 [2020-10-13 05:21:52,008 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 05:21:52,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 05:21:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 115. [2020-10-13 05:21:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 05:21:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-13 05:21:52,014 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 107 [2020-10-13 05:21:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:52,015 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-13 05:21:52,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:21:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-13 05:21:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:21:52,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:52,017 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:52,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:21:52,017 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash -334214122, now seen corresponding path program 36 times [2020-10-13 05:21:52,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:52,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123152479] [2020-10-13 05:21:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:53,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:21:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:21:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:21:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:57,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:57,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:21:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:21:57,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 05:21:58,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123152479] [2020-10-13 05:21:58,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:58,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:21:58,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495630822] [2020-10-13 05:21:58,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:21:58,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:21:58,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:21:58,534 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 30 states. [2020-10-13 05:21:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:58,895 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2020-10-13 05:21:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:21:58,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-10-13 05:21:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:58,897 INFO L225 Difference]: With dead ends: 176 [2020-10-13 05:21:58,897 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 05:21:58,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:21:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 05:21:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 05:21:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 05:21:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-13 05:21:58,903 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2020-10-13 05:21:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:58,903 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-13 05:21:58,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:21:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-13 05:21:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 05:21:58,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:58,904 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:58,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:21:58,904 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1799833240, now seen corresponding path program 37 times [2020-10-13 05:21:58,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:58,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78170944] [2020-10-13 05:21:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:03,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:09,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:09,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10526 [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:22:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:09,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:09,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:09,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:09,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:09,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 05:22:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:09,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:09,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:22:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-13 05:22:10,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 05:22:10,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78170944] [2020-10-13 05:22:10,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:10,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:22:10,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099412354] [2020-10-13 05:22:10,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:22:10,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:22:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:22:10,382 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 19 states. [2020-10-13 05:22:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:10,798 INFO L93 Difference]: Finished difference Result 209 states and 244 transitions. [2020-10-13 05:22:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:22:10,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 112 [2020-10-13 05:22:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:10,800 INFO L225 Difference]: With dead ends: 209 [2020-10-13 05:22:10,800 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:22:10,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:22:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:22:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 120. [2020-10-13 05:22:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 05:22:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-13 05:22:10,808 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 112 [2020-10-13 05:22:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:10,808 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-13 05:22:10,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:22:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-13 05:22:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 05:22:10,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:10,809 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:10,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:22:10,810 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1058653165, now seen corresponding path program 38 times [2020-10-13 05:22:10,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:10,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804876797] [2020-10-13 05:22:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:10,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:10,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:11,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking...