/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:12,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:12,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:12,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:12,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:12,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:12,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:12,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:12,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:12,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:12,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:12,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:12,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:12,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:12,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:12,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:12,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:12,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:12,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:12,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:12,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:12,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:12,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:12,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:12,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:12,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:12,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:12,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:12,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:12,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:12,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:12,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:12,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:12,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:12,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:12,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:12,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:12,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:12,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:12,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:12,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:12,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:38:12,661 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:12,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:12,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:12,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:12,665 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:12,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:12,665 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:12,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:12,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:12,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:12,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:12,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:12,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:12,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:12,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:12,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:12,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:12,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:12,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:12,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:12,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:12,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:12,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:12,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:12,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:12,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:12,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:12,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:12,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:12,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:38:12,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:13,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:13,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:13,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:13,021 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:13,022 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2020-10-13 04:38:13,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aed222744/16aaa83d101a43d99ab788e6fcd16f2e/FLAGf33727b6a [2020-10-13 04:38:13,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:13,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2020-10-13 04:38:13,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aed222744/16aaa83d101a43d99ab788e6fcd16f2e/FLAGf33727b6a [2020-10-13 04:38:13,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aed222744/16aaa83d101a43d99ab788e6fcd16f2e [2020-10-13 04:38:13,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:13,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:13,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:13,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:13,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:13,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674884e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:13, skipping insertion in model container [2020-10-13 04:38:13,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:13" (1/1) ... [2020-10-13 04:38:13,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:14,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:14,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:14,241 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:14,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:14,292 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:14,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14 WrapperNode [2020-10-13 04:38:14,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:14,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:14,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:14,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:14,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... [2020-10-13 04:38:14,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:14,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:14,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:14,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:14,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-10-13 04:38:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-10-13 04:38:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:38:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-10-13 04:38:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-10-13 04:38:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:38:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:14,945 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:14,945 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 04:38:14,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:14 BoogieIcfgContainer [2020-10-13 04:38:14,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:14,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:14,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:14,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:14,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:13" (1/3) ... [2020-10-13 04:38:14,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd7c5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:14, skipping insertion in model container [2020-10-13 04:38:14,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:14" (2/3) ... [2020-10-13 04:38:14,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd7c5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:14, skipping insertion in model container [2020-10-13 04:38:14,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:14" (3/3) ... [2020-10-13 04:38:14,962 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2020-10-13 04:38:14,975 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:14,987 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:15,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:15,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:15,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:15,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:15,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:15,044 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:15,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:15,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:15,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-13 04:38:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:38:15,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:15,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:15,074 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536170, now seen corresponding path program 1 times [2020-10-13 04:38:15,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:15,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400669503] [2020-10-13 04:38:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:15,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:15,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:15,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:38:15,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:15,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-13 04:38:15,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:15,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:38:15,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:15,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:15,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:15,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:15,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:38:15,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:15,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400669503] [2020-10-13 04:38:15,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:15,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:15,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936177425] [2020-10-13 04:38:15,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:15,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:15,771 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-13 04:38:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:16,075 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2020-10-13 04:38:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:16,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 04:38:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:16,092 INFO L225 Difference]: With dead ends: 129 [2020-10-13 04:38:16,092 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:38:16,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:38:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2020-10-13 04:38:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:38:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-13 04:38:16,168 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2020-10-13 04:38:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:16,169 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-13 04:38:16,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-13 04:38:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:38:16,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:16,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:16,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:16,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:16,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2111973388, now seen corresponding path program 1 times [2020-10-13 04:38:16,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:16,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741433473] [2020-10-13 04:38:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:16,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:38:16,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:16,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-13 04:38:16,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:16,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:16,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:16,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:38:16,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:16,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741433473] [2020-10-13 04:38:16,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:16,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:16,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717028207] [2020-10-13 04:38:16,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:16,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:16,559 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-10-13 04:38:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:16,834 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2020-10-13 04:38:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:16,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 04:38:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:16,838 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:38:16,838 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:38:16,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:38:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2020-10-13 04:38:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:38:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-13 04:38:16,855 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2020-10-13 04:38:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:16,855 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-13 04:38:16,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-13 04:38:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:38:16,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:16,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:16,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:16,857 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1499407314, now seen corresponding path program 2 times [2020-10-13 04:38:16,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:16,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992067091] [2020-10-13 04:38:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:38:17,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-13 04:38:17,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:38:17,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:17,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:17,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:17,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:17,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:17,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:17,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:17,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992067091] [2020-10-13 04:38:17,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:17,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:17,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304143610] [2020-10-13 04:38:17,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:17,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:17,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:17,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:17,153 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 6 states. [2020-10-13 04:38:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:17,451 INFO L93 Difference]: Finished difference Result 168 states and 218 transitions. [2020-10-13 04:38:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:17,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 04:38:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:17,456 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:38:17,456 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 04:38:17,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 04:38:17,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 54. [2020-10-13 04:38:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:38:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-13 04:38:17,473 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 18 [2020-10-13 04:38:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:17,474 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-13 04:38:17,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-13 04:38:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:38:17,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:17,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:17,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:17,476 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1702686768, now seen corresponding path program 3 times [2020-10-13 04:38:17,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:17,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907769789] [2020-10-13 04:38:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:38:17,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:17,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-13 04:38:17,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:38:17,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:17,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:17,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:17,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:17,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:17,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:17,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:17,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:17,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:17,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:38:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:17,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907769789] [2020-10-13 04:38:17,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:17,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:38:17,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444254742] [2020-10-13 04:38:17,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:38:17,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:17,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:38:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:17,888 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-10-13 04:38:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:18,263 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2020-10-13 04:38:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:18,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 04:38:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:18,268 INFO L225 Difference]: With dead ends: 194 [2020-10-13 04:38:18,268 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 04:38:18,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 04:38:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 56. [2020-10-13 04:38:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:38:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-13 04:38:18,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 20 [2020-10-13 04:38:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:18,294 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-13 04:38:18,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:38:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-13 04:38:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:38:18,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:18,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:18,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:18,298 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash 514253554, now seen corresponding path program 4 times [2020-10-13 04:38:18,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:18,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346787066] [2020-10-13 04:38:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:38:18,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-13 04:38:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:38:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:18,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:18,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:18,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:18,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:18,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:18,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:18,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:18,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:18,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346787066] [2020-10-13 04:38:18,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:18,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:38:18,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997244575] [2020-10-13 04:38:18,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:38:18,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:38:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:18,634 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 8 states. [2020-10-13 04:38:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:18,927 INFO L93 Difference]: Finished difference Result 220 states and 290 transitions. [2020-10-13 04:38:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:38:18,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 04:38:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:18,929 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:38:18,929 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:38:18,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:38:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 58. [2020-10-13 04:38:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:38:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-13 04:38:18,941 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 22 [2020-10-13 04:38:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:18,941 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-13 04:38:18,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:38:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-13 04:38:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:18,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:18,943 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:18,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:18,943 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 690124180, now seen corresponding path program 5 times [2020-10-13 04:38:18,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:18,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889543366] [2020-10-13 04:38:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:19,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-13 04:38:19,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:38:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:19,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:19,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:19,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:19,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:19,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:19,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:19,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889543366] [2020-10-13 04:38:19,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:19,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:38:19,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525615917] [2020-10-13 04:38:19,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:38:19,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:38:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:19,243 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 9 states. [2020-10-13 04:38:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:19,610 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2020-10-13 04:38:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:38:19,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 04:38:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:19,613 INFO L225 Difference]: With dead ends: 246 [2020-10-13 04:38:19,613 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 04:38:19,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 04:38:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 60. [2020-10-13 04:38:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:38:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-13 04:38:19,624 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 24 [2020-10-13 04:38:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:19,625 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-13 04:38:19,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:38:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-13 04:38:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:38:19,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:19,626 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:19,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:19,627 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2096896074, now seen corresponding path program 6 times [2020-10-13 04:38:19,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:19,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449735237] [2020-10-13 04:38:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:19,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:38:19,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:19,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-13 04:38:19,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:19,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:19,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:19,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:19,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:19,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:19,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:19,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:19,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:19,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449735237] [2020-10-13 04:38:19,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:19,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:19,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10089307] [2020-10-13 04:38:19,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:19,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:19,962 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 10 states. [2020-10-13 04:38:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:20,381 INFO L93 Difference]: Finished difference Result 272 states and 362 transitions. [2020-10-13 04:38:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:38:20,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 04:38:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:20,384 INFO L225 Difference]: With dead ends: 272 [2020-10-13 04:38:20,384 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 04:38:20,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 04:38:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 62. [2020-10-13 04:38:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:38:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-13 04:38:20,395 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 26 [2020-10-13 04:38:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:20,396 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-13 04:38:20,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-13 04:38:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:20,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:20,397 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:20,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:20,397 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash -363767464, now seen corresponding path program 7 times [2020-10-13 04:38:20,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:20,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457760641] [2020-10-13 04:38:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:20,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:20,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:20,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 04:38:20,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:38:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:38:20,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:20,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:20,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:20,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:20,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:20,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:20,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457760641] [2020-10-13 04:38:20,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:20,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:38:20,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662823162] [2020-10-13 04:38:20,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:38:20,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:38:20,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:20,802 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 11 states. [2020-10-13 04:38:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:21,289 INFO L93 Difference]: Finished difference Result 298 states and 398 transitions. [2020-10-13 04:38:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:21,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 04:38:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:21,292 INFO L225 Difference]: With dead ends: 298 [2020-10-13 04:38:21,292 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 04:38:21,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 04:38:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 64. [2020-10-13 04:38:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:38:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-13 04:38:21,302 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 28 [2020-10-13 04:38:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:21,303 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-13 04:38:21,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:38:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-13 04:38:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:38:21,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:21,304 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:21,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:21,305 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1274484102, now seen corresponding path program 8 times [2020-10-13 04:38:21,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:21,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768907042] [2020-10-13 04:38:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:38:21,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-13 04:38:21,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:38:21,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:21,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:38:21,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:21,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:21,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:38:21,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:38:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:21,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768907042] [2020-10-13 04:38:21,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:21,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:38:21,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489400117] [2020-10-13 04:38:21,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:38:21,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:38:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:21,798 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 12 states. [2020-10-13 04:38:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:22,267 INFO L93 Difference]: Finished difference Result 324 states and 434 transitions. [2020-10-13 04:38:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:22,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 04:38:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:22,270 INFO L225 Difference]: With dead ends: 324 [2020-10-13 04:38:22,270 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 04:38:22,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 04:38:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 66. [2020-10-13 04:38:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:38:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-13 04:38:22,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 30 [2020-10-13 04:38:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:22,280 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-13 04:38:22,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:38:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-13 04:38:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:22,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:22,281 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:22,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:38:22,282 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:22,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:22,282 INFO L82 PathProgramCache]: Analyzing trace with hash -299844836, now seen corresponding path program 9 times [2020-10-13 04:38:22,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:22,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826477163] [2020-10-13 04:38:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:22,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:22,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-13 04:38:22,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:38:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:38:22,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:22,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:22,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:22,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:22,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:22,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826477163] [2020-10-13 04:38:22,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:22,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:38:22,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183117517] [2020-10-13 04:38:22,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:38:22,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:22,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:38:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:38:22,807 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 13 states. [2020-10-13 04:38:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:23,366 INFO L93 Difference]: Finished difference Result 350 states and 470 transitions. [2020-10-13 04:38:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:38:23,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 04:38:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:23,369 INFO L225 Difference]: With dead ends: 350 [2020-10-13 04:38:23,369 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 04:38:23,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:38:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 04:38:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 68. [2020-10-13 04:38:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:38:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 04:38:23,384 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 32 [2020-10-13 04:38:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:23,384 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 04:38:23,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:38:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 04:38:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:38:23,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:23,388 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:23,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:38:23,389 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash 25619262, now seen corresponding path program 10 times [2020-10-13 04:38:23,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:23,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615120933] [2020-10-13 04:38:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:24,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:38:24,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-13 04:38:24,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:38:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:38:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:24,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:24,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:24,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:24,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:24,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:24,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615120933] [2020-10-13 04:38:24,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:24,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:38:24,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977589901] [2020-10-13 04:38:24,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:38:24,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:38:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:24,174 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 14 states. [2020-10-13 04:38:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:24,867 INFO L93 Difference]: Finished difference Result 376 states and 506 transitions. [2020-10-13 04:38:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:38:24,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-13 04:38:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:24,874 INFO L225 Difference]: With dead ends: 376 [2020-10-13 04:38:24,874 INFO L226 Difference]: Without dead ends: 335 [2020-10-13 04:38:24,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-13 04:38:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 70. [2020-10-13 04:38:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:38:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-13 04:38:24,897 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-10-13 04:38:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:24,899 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-13 04:38:24,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:38:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-13 04:38:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:38:24,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:24,905 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:24,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:38:24,905 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash -735995168, now seen corresponding path program 11 times [2020-10-13 04:38:24,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:24,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579578806] [2020-10-13 04:38:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:24,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:24,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:38:25,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-13 04:38:25,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:38:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:38:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:25,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:25,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:25,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:25,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:25,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:25,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579578806] [2020-10-13 04:38:25,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:25,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:38:25,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110214325] [2020-10-13 04:38:25,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:38:25,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:38:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:38:25,794 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 15 states. [2020-10-13 04:38:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:26,462 INFO L93 Difference]: Finished difference Result 402 states and 542 transitions. [2020-10-13 04:38:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:38:26,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-13 04:38:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:26,465 INFO L225 Difference]: With dead ends: 402 [2020-10-13 04:38:26,465 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 04:38:26,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:38:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 04:38:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 72. [2020-10-13 04:38:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:38:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-10-13 04:38:26,476 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 36 [2020-10-13 04:38:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:26,477 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-10-13 04:38:26,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:38:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-10-13 04:38:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:38:26,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:26,480 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:26,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:38:26,481 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1791945218, now seen corresponding path program 12 times [2020-10-13 04:38:26,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:26,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538455989] [2020-10-13 04:38:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:38:27,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:27,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-13 04:38:27,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:38:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:38:27,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:27,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:27,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:27,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:27,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:27,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538455989] [2020-10-13 04:38:27,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:27,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:38:27,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339475131] [2020-10-13 04:38:27,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:38:27,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:27,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:38:27,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:38:27,373 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 16 states. [2020-10-13 04:38:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:28,009 INFO L93 Difference]: Finished difference Result 428 states and 578 transitions. [2020-10-13 04:38:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:38:28,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-13 04:38:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:28,014 INFO L225 Difference]: With dead ends: 428 [2020-10-13 04:38:28,015 INFO L226 Difference]: Without dead ends: 387 [2020-10-13 04:38:28,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:38:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-13 04:38:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 74. [2020-10-13 04:38:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:38:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-13 04:38:28,029 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 38 [2020-10-13 04:38:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:28,029 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-13 04:38:28,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:38:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-13 04:38:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:38:28,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:28,030 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:28,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:38:28,030 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash 191166628, now seen corresponding path program 13 times [2020-10-13 04:38:28,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:28,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170589340] [2020-10-13 04:38:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:28,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:38:28,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:28,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-13 04:38:28,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:28,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:38:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:38:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:29,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:29,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:29,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:29,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:29,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:29,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:29,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:29,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:29,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170589340] [2020-10-13 04:38:29,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:29,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:38:29,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469137461] [2020-10-13 04:38:29,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:38:29,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:29,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:38:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:29,018 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 17 states. [2020-10-13 04:38:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:29,878 INFO L93 Difference]: Finished difference Result 454 states and 614 transitions. [2020-10-13 04:38:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:38:29,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 04:38:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:29,883 INFO L225 Difference]: With dead ends: 454 [2020-10-13 04:38:29,883 INFO L226 Difference]: Without dead ends: 413 [2020-10-13 04:38:29,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-13 04:38:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 76. [2020-10-13 04:38:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:38:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-13 04:38:29,893 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 40 [2020-10-13 04:38:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:29,893 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-13 04:38:29,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:38:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-13 04:38:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:38:29,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:29,895 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:29,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:38:29,896 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash -558766394, now seen corresponding path program 14 times [2020-10-13 04:38:29,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:29,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751250687] [2020-10-13 04:38:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:38:30,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:30,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-13 04:38:30,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:38:30,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:30,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:38:30,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:30,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:30,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:30,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:30,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:30,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751250687] [2020-10-13 04:38:30,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:30,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:38:30,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491386152] [2020-10-13 04:38:30,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:38:30,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:38:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:38:30,847 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 18 states. [2020-10-13 04:38:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:31,674 INFO L93 Difference]: Finished difference Result 480 states and 650 transitions. [2020-10-13 04:38:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:38:31,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-13 04:38:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:31,679 INFO L225 Difference]: With dead ends: 480 [2020-10-13 04:38:31,679 INFO L226 Difference]: Without dead ends: 439 [2020-10-13 04:38:31,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:38:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-13 04:38:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 78. [2020-10-13 04:38:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:38:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-13 04:38:31,693 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 42 [2020-10-13 04:38:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:31,695 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-13 04:38:31,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:38:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-13 04:38:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:38:31,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:31,696 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:31,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:38:31,696 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 310105192, now seen corresponding path program 15 times [2020-10-13 04:38:31,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:31,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027324798] [2020-10-13 04:38:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:31,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:38:32,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-13 04:38:32,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:38:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:38:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:32,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:32,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:32,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:32,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027324798] [2020-10-13 04:38:32,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:32,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:38:32,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240000461] [2020-10-13 04:38:32,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:38:32,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:38:32,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:38:32,792 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 19 states. [2020-10-13 04:38:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:33,731 INFO L93 Difference]: Finished difference Result 506 states and 686 transitions. [2020-10-13 04:38:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:38:33,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-13 04:38:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:33,734 INFO L225 Difference]: With dead ends: 506 [2020-10-13 04:38:33,734 INFO L226 Difference]: Without dead ends: 465 [2020-10-13 04:38:33,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:38:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-13 04:38:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 80. [2020-10-13 04:38:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:38:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-10-13 04:38:33,745 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 44 [2020-10-13 04:38:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:33,745 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-10-13 04:38:33,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:38:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-10-13 04:38:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:38:33,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:33,746 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:33,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:38:33,746 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2072043914, now seen corresponding path program 16 times [2020-10-13 04:38:33,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:33,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927898306] [2020-10-13 04:38:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:33,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:34,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:34,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:38:34,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:34,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-13 04:38:34,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:34,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:38:34,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:34,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:38:34,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:34,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:34,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:34,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:34,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:34,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:34,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:34,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:34,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:34,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927898306] [2020-10-13 04:38:34,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:34,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:38:34,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362964453] [2020-10-13 04:38:34,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:38:34,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:34,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:38:34,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:38:34,904 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 20 states. [2020-10-13 04:38:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:35,815 INFO L93 Difference]: Finished difference Result 532 states and 722 transitions. [2020-10-13 04:38:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:38:35,815 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-13 04:38:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:35,819 INFO L225 Difference]: With dead ends: 532 [2020-10-13 04:38:35,819 INFO L226 Difference]: Without dead ends: 491 [2020-10-13 04:38:35,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:38:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-13 04:38:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 82. [2020-10-13 04:38:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:38:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-13 04:38:35,829 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 46 [2020-10-13 04:38:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:35,830 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-13 04:38:35,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:38:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-13 04:38:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:38:35,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:35,831 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:35,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:38:35,831 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1216926164, now seen corresponding path program 17 times [2020-10-13 04:38:35,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:35,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251693294] [2020-10-13 04:38:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:38:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-13 04:38:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:38:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:38:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:37,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:37,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:37,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:37,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:37,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:37,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251693294] [2020-10-13 04:38:37,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:37,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:38:37,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274179947] [2020-10-13 04:38:37,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:38:37,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:38:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:38:37,041 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 21 states. [2020-10-13 04:38:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:38,092 INFO L93 Difference]: Finished difference Result 558 states and 758 transitions. [2020-10-13 04:38:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:38:38,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-13 04:38:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:38,099 INFO L225 Difference]: With dead ends: 558 [2020-10-13 04:38:38,099 INFO L226 Difference]: Without dead ends: 517 [2020-10-13 04:38:38,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:38:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-13 04:38:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 84. [2020-10-13 04:38:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:38:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-13 04:38:38,116 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 48 [2020-10-13 04:38:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:38,117 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-13 04:38:38,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:38:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-13 04:38:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:38:38,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:38,117 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:38,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:38:38,118 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash -821241266, now seen corresponding path program 18 times [2020-10-13 04:38:38,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:38,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884824935] [2020-10-13 04:38:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:38:39,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:39,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 995 [2020-10-13 04:38:39,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:38:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:38:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:39,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:39,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:39,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:39,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:39,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:39,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884824935] [2020-10-13 04:38:39,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:39,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:38:39,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207943080] [2020-10-13 04:38:39,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:38:39,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:39,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:38:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:38:39,418 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 22 states. [2020-10-13 04:38:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:40,362 INFO L93 Difference]: Finished difference Result 584 states and 794 transitions. [2020-10-13 04:38:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:38:40,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 04:38:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:40,366 INFO L225 Difference]: With dead ends: 584 [2020-10-13 04:38:40,367 INFO L226 Difference]: Without dead ends: 543 [2020-10-13 04:38:40,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:38:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-13 04:38:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 86. [2020-10-13 04:38:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:38:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-10-13 04:38:40,379 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 50 [2020-10-13 04:38:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:40,380 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-10-13 04:38:40,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:38:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-10-13 04:38:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:38:40,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:40,381 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:40,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:38:40,381 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1474823664, now seen corresponding path program 19 times [2020-10-13 04:38:40,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:40,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209587144] [2020-10-13 04:38:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:41,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:38:41,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:41,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-13 04:38:41,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:38:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:38:41,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:41,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:41,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:41,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:41,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:41,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:41,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:41,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:41,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:41,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:41,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209587144] [2020-10-13 04:38:41,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:41,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:38:41,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426982868] [2020-10-13 04:38:41,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:38:41,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:41,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:38:41,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:41,605 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 23 states. [2020-10-13 04:38:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:43,018 INFO L93 Difference]: Finished difference Result 610 states and 830 transitions. [2020-10-13 04:38:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:38:43,021 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 04:38:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:43,030 INFO L225 Difference]: With dead ends: 610 [2020-10-13 04:38:43,030 INFO L226 Difference]: Without dead ends: 569 [2020-10-13 04:38:43,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-13 04:38:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 88. [2020-10-13 04:38:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:38:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-10-13 04:38:43,053 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 52 [2020-10-13 04:38:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:43,054 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-10-13 04:38:43,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:38:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-10-13 04:38:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:38:43,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:43,055 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:43,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:38:43,056 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:43,056 INFO L82 PathProgramCache]: Analyzing trace with hash 380031250, now seen corresponding path program 20 times [2020-10-13 04:38:43,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:43,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018083605] [2020-10-13 04:38:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:43,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:38:44,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:44,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-13 04:38:44,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:38:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:38:44,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:45,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:45,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:45,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:45,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:45,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:45,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:45,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:45,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018083605] [2020-10-13 04:38:45,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:45,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:38:45,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456058115] [2020-10-13 04:38:45,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:38:45,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:38:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:38:45,231 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 24 states. [2020-10-13 04:38:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:46,655 INFO L93 Difference]: Finished difference Result 636 states and 866 transitions. [2020-10-13 04:38:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:38:46,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-13 04:38:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:46,660 INFO L225 Difference]: With dead ends: 636 [2020-10-13 04:38:46,660 INFO L226 Difference]: Without dead ends: 595 [2020-10-13 04:38:46,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:38:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-13 04:38:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 90. [2020-10-13 04:38:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:38:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-13 04:38:46,675 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 54 [2020-10-13 04:38:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:46,676 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-13 04:38:46,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:38:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-13 04:38:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:38:46,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:46,677 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:46,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:38:46,677 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash 551508916, now seen corresponding path program 21 times [2020-10-13 04:38:46,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:46,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896938481] [2020-10-13 04:38:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:46,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:46,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:48,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:48,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:38:48,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1557 [2020-10-13 04:38:48,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:38:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:38:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:48,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:48,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:48,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:48,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:48,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:48,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:48,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:48,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:48,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896938481] [2020-10-13 04:38:48,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:48,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:38:48,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476685102] [2020-10-13 04:38:48,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:38:48,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:38:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:38:48,607 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 25 states. [2020-10-13 04:38:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:49,983 INFO L93 Difference]: Finished difference Result 662 states and 902 transitions. [2020-10-13 04:38:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:38:49,991 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 04:38:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:49,994 INFO L225 Difference]: With dead ends: 662 [2020-10-13 04:38:49,995 INFO L226 Difference]: Without dead ends: 621 [2020-10-13 04:38:50,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:38:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-13 04:38:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 92. [2020-10-13 04:38:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:38:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2020-10-13 04:38:50,025 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 56 [2020-10-13 04:38:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:50,026 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2020-10-13 04:38:50,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:38:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2020-10-13 04:38:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:38:50,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:50,026 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:50,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:38:50,027 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2132788694, now seen corresponding path program 22 times [2020-10-13 04:38:50,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:50,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254732233] [2020-10-13 04:38:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:51,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:38:51,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1206 [2020-10-13 04:38:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:38:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:38:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:51,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:51,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:51,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:51,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:51,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:51,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:51,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:51,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:51,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:51,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:51,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254732233] [2020-10-13 04:38:51,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:51,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:38:51,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546575059] [2020-10-13 04:38:51,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:38:51,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:38:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:38:51,702 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 26 states. [2020-10-13 04:38:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:53,375 INFO L93 Difference]: Finished difference Result 688 states and 938 transitions. [2020-10-13 04:38:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:38:53,376 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 04:38:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:53,382 INFO L225 Difference]: With dead ends: 688 [2020-10-13 04:38:53,382 INFO L226 Difference]: Without dead ends: 647 [2020-10-13 04:38:53,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:38:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-13 04:38:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 94. [2020-10-13 04:38:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:38:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-13 04:38:53,406 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 58 [2020-10-13 04:38:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:53,406 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-13 04:38:53,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:38:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-13 04:38:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:38:53,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:53,407 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:53,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:38:53,408 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1324232568, now seen corresponding path program 23 times [2020-10-13 04:38:53,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:53,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539573429] [2020-10-13 04:38:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:53,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:54,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:54,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:38:54,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:54,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-13 04:38:54,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:54,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:38:54,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:54,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:38:54,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:55,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:55,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:55,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:55,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:55,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:55,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:55,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539573429] [2020-10-13 04:38:55,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:55,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:38:55,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156669946] [2020-10-13 04:38:55,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:38:55,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:38:55,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:38:55,323 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 27 states. [2020-10-13 04:38:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:57,010 INFO L93 Difference]: Finished difference Result 714 states and 974 transitions. [2020-10-13 04:38:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:38:57,010 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 04:38:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:57,014 INFO L225 Difference]: With dead ends: 714 [2020-10-13 04:38:57,015 INFO L226 Difference]: Without dead ends: 673 [2020-10-13 04:38:57,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:38:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-10-13 04:38:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 96. [2020-10-13 04:38:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:38:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-13 04:38:57,028 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 60 [2020-10-13 04:38:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:57,028 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-13 04:38:57,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:38:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-13 04:38:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:38:57,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:57,029 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:57,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:38:57,029 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:57,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1690876058, now seen corresponding path program 24 times [2020-10-13 04:38:57,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:57,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040233614] [2020-10-13 04:38:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:58,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:38:58,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:38:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-13 04:38:58,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:38:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:38:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:58,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:58,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:58,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:58,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:58,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:58,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:58,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040233614] [2020-10-13 04:38:58,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:58,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:38:58,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366574476] [2020-10-13 04:38:58,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:38:58,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:38:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:38:58,456 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 28 states. [2020-10-13 04:38:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:59,859 INFO L93 Difference]: Finished difference Result 740 states and 1010 transitions. [2020-10-13 04:38:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:38:59,859 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 04:38:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:59,863 INFO L225 Difference]: With dead ends: 740 [2020-10-13 04:38:59,863 INFO L226 Difference]: Without dead ends: 699 [2020-10-13 04:38:59,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:38:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-13 04:38:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 98. [2020-10-13 04:38:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:38:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-13 04:38:59,877 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 62 [2020-10-13 04:38:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:59,877 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-13 04:38:59,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:38:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-13 04:38:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:38:59,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:59,878 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:59,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:38:59,878 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1847951676, now seen corresponding path program 25 times [2020-10-13 04:38:59,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:59,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125450324] [2020-10-13 04:38:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:59,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:01,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:01,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:39:01,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:01,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-13 04:39:01,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:01,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:39:01,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:01,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:39:01,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:01,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:01,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:01,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:01,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125450324] [2020-10-13 04:39:01,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:01,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:39:01,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986172101] [2020-10-13 04:39:01,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:39:01,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:39:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:39:01,544 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 29 states. [2020-10-13 04:39:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:03,198 INFO L93 Difference]: Finished difference Result 766 states and 1046 transitions. [2020-10-13 04:39:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:39:03,198 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-13 04:39:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:03,202 INFO L225 Difference]: With dead ends: 766 [2020-10-13 04:39:03,202 INFO L226 Difference]: Without dead ends: 725 [2020-10-13 04:39:03,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:39:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-13 04:39:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 100. [2020-10-13 04:39:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:39:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-13 04:39:03,215 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 64 [2020-10-13 04:39:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:03,215 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-13 04:39:03,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:39:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-13 04:39:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:39:03,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:03,216 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:03,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:39:03,216 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1821202082, now seen corresponding path program 26 times [2020-10-13 04:39:03,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:03,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071127925] [2020-10-13 04:39:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:03,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:04,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:04,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1315 [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:39:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:05,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:05,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:05,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:05,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071127925] [2020-10-13 04:39:05,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:05,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:39:05,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898015525] [2020-10-13 04:39:05,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:39:05,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:39:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:39:05,010 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 30 states. [2020-10-13 04:39:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:06,627 INFO L93 Difference]: Finished difference Result 792 states and 1082 transitions. [2020-10-13 04:39:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:39:06,627 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 04:39:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:06,631 INFO L225 Difference]: With dead ends: 792 [2020-10-13 04:39:06,631 INFO L226 Difference]: Without dead ends: 751 [2020-10-13 04:39:06,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:39:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-13 04:39:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 102. [2020-10-13 04:39:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:39:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-13 04:39:06,643 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 66 [2020-10-13 04:39:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:06,644 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-13 04:39:06,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:39:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-13 04:39:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:39:06,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:06,645 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:06,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:39:06,645 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1709813504, now seen corresponding path program 27 times [2020-10-13 04:39:06,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:06,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725711250] [2020-10-13 04:39:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:06,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:39:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:08,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:08,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:08,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:08,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:08,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:08,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:08,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:08,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725711250] [2020-10-13 04:39:08,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:08,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:39:08,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736806931] [2020-10-13 04:39:08,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:39:08,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:08,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:39:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:39:08,605 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 31 states. [2020-10-13 04:39:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:10,657 INFO L93 Difference]: Finished difference Result 818 states and 1118 transitions. [2020-10-13 04:39:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:39:10,658 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-13 04:39:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:10,661 INFO L225 Difference]: With dead ends: 818 [2020-10-13 04:39:10,662 INFO L226 Difference]: Without dead ends: 777 [2020-10-13 04:39:10,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:39:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-10-13 04:39:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 104. [2020-10-13 04:39:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:39:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-10-13 04:39:10,674 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 68 [2020-10-13 04:39:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:10,674 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-10-13 04:39:10,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:39:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-10-13 04:39:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:39:10,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:10,675 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:10,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:39:10,676 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2039572446, now seen corresponding path program 28 times [2020-10-13 04:39:10,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:10,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38785669] [2020-10-13 04:39:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:10,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:12,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:12,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:39:12,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1646 [2020-10-13 04:39:12,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:39:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:39:12,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:12,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:12,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:12,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:12,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:12,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38785669] [2020-10-13 04:39:12,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:12,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:39:12,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40561494] [2020-10-13 04:39:12,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:39:12,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:39:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:39:12,868 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand 32 states. [2020-10-13 04:39:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:15,066 INFO L93 Difference]: Finished difference Result 844 states and 1154 transitions. [2020-10-13 04:39:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:39:15,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-13 04:39:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:15,071 INFO L225 Difference]: With dead ends: 844 [2020-10-13 04:39:15,071 INFO L226 Difference]: Without dead ends: 803 [2020-10-13 04:39:15,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:39:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-10-13 04:39:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 106. [2020-10-13 04:39:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:39:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2020-10-13 04:39:15,084 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 70 [2020-10-13 04:39:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:15,085 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2020-10-13 04:39:15,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:39:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2020-10-13 04:39:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:39:15,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:15,086 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:15,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:39:15,086 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:15,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:15,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1110335804, now seen corresponding path program 29 times [2020-10-13 04:39:15,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:15,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741578054] [2020-10-13 04:39:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:15,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:39:16,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:16,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:16,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:16,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:16,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:16,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:16,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741578054] [2020-10-13 04:39:16,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:16,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:39:16,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853493574] [2020-10-13 04:39:16,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:39:16,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:39:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:39:16,857 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 33 states. [2020-10-13 04:39:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:18,681 INFO L93 Difference]: Finished difference Result 870 states and 1190 transitions. [2020-10-13 04:39:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:39:18,681 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-13 04:39:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:18,686 INFO L225 Difference]: With dead ends: 870 [2020-10-13 04:39:18,686 INFO L226 Difference]: Without dead ends: 829 [2020-10-13 04:39:18,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:39:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-10-13 04:39:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 108. [2020-10-13 04:39:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:39:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-13 04:39:18,700 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 72 [2020-10-13 04:39:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:18,701 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-13 04:39:18,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:39:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-13 04:39:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:39:18,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:18,706 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:18,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:39:18,706 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1467120410, now seen corresponding path program 30 times [2020-10-13 04:39:18,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:18,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13263972] [2020-10-13 04:39:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:18,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:18,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:20,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:39:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-13 04:39:20,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:39:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:39:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:20,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:20,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:20,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:20,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:20,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:20,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:20,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:20,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:20,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:20,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:20,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13263972] [2020-10-13 04:39:20,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:20,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:39:20,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051363083] [2020-10-13 04:39:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:39:20,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:39:20,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:39:20,622 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 34 states. [2020-10-13 04:39:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:22,729 INFO L93 Difference]: Finished difference Result 896 states and 1226 transitions. [2020-10-13 04:39:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:39:22,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-13 04:39:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:22,739 INFO L225 Difference]: With dead ends: 896 [2020-10-13 04:39:22,739 INFO L226 Difference]: Without dead ends: 855 [2020-10-13 04:39:22,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:39:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-13 04:39:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 110. [2020-10-13 04:39:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:39:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2020-10-13 04:39:22,751 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 74 [2020-10-13 04:39:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:22,752 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2020-10-13 04:39:22,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:39:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2020-10-13 04:39:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:39:22,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:22,753 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:22,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:39:22,753 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash -739743096, now seen corresponding path program 31 times [2020-10-13 04:39:22,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:22,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198450189] [2020-10-13 04:39:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:22,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1362 [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:39:24,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:24,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:24,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:24,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:24,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:24,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:24,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:24,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:24,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:24,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:24,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198450189] [2020-10-13 04:39:24,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:24,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:39:24,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697915888] [2020-10-13 04:39:24,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:39:24,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:39:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:39:24,752 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 35 states. [2020-10-13 04:39:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:27,306 INFO L93 Difference]: Finished difference Result 922 states and 1262 transitions. [2020-10-13 04:39:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:39:27,307 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-13 04:39:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:27,313 INFO L225 Difference]: With dead ends: 922 [2020-10-13 04:39:27,314 INFO L226 Difference]: Without dead ends: 881 [2020-10-13 04:39:27,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:39:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-13 04:39:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 112. [2020-10-13 04:39:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:39:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-13 04:39:27,341 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 76 [2020-10-13 04:39:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:27,344 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-13 04:39:27,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:39:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-13 04:39:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:39:27,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:27,346 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:27,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:39:27,347 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:27,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1809813590, now seen corresponding path program 32 times [2020-10-13 04:39:27,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:27,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115567303] [2020-10-13 04:39:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:27,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:31,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:31,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:39:31,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:31,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3989 [2020-10-13 04:39:31,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:39:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:31,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:39:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:32,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:32,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:32,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:32,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:32,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115567303] [2020-10-13 04:39:32,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:32,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:39:32,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051307979] [2020-10-13 04:39:32,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:39:32,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:39:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:39:32,106 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 36 states. [2020-10-13 04:39:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:34,806 INFO L93 Difference]: Finished difference Result 948 states and 1298 transitions. [2020-10-13 04:39:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:39:34,807 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-13 04:39:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:34,811 INFO L225 Difference]: With dead ends: 948 [2020-10-13 04:39:34,812 INFO L226 Difference]: Without dead ends: 907 [2020-10-13 04:39:34,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:39:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-10-13 04:39:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 114. [2020-10-13 04:39:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:39:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-10-13 04:39:34,825 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 78 [2020-10-13 04:39:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:34,825 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-10-13 04:39:34,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:39:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-10-13 04:39:34,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:39:34,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:34,827 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:34,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:39:34,827 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash 644592716, now seen corresponding path program 33 times [2020-10-13 04:39:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:34,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234439867] [2020-10-13 04:39:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:36,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:39:36,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-13 04:39:36,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:39:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:39:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:37,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:37,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:37,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234439867] [2020-10-13 04:39:37,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:37,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:39:37,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660751574] [2020-10-13 04:39:37,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:39:37,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:39:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:39:37,136 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 37 states. [2020-10-13 04:39:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:39,387 INFO L93 Difference]: Finished difference Result 974 states and 1334 transitions. [2020-10-13 04:39:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:39:39,387 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-13 04:39:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:39,391 INFO L225 Difference]: With dead ends: 974 [2020-10-13 04:39:39,391 INFO L226 Difference]: Without dead ends: 933 [2020-10-13 04:39:39,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:39:39,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-13 04:39:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 116. [2020-10-13 04:39:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:39:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-10-13 04:39:39,402 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 80 [2020-10-13 04:39:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:39,403 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-10-13 04:39:39,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:39:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-10-13 04:39:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:39:39,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:39,404 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:39,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:39:39,404 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1392007278, now seen corresponding path program 34 times [2020-10-13 04:39:39,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:39,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770148610] [2020-10-13 04:39:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:39,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:41,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1770 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:39:41,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:41,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:41,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:41,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:41,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770148610] [2020-10-13 04:39:41,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:41,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:39:41,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477854555] [2020-10-13 04:39:41,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:39:41,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:41,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:39:41,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:39:41,948 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 38 states. [2020-10-13 04:39:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:44,792 INFO L93 Difference]: Finished difference Result 1000 states and 1370 transitions. [2020-10-13 04:39:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:39:44,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-13 04:39:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:44,797 INFO L225 Difference]: With dead ends: 1000 [2020-10-13 04:39:44,797 INFO L226 Difference]: Without dead ends: 959 [2020-10-13 04:39:44,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:39:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2020-10-13 04:39:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 118. [2020-10-13 04:39:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:39:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-10-13 04:39:44,808 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 82 [2020-10-13 04:39:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:44,809 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-10-13 04:39:44,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:39:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-10-13 04:39:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:44,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:44,810 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:44,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:39:44,810 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1897104368, now seen corresponding path program 35 times [2020-10-13 04:39:44,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:44,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765839788] [2020-10-13 04:39:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:46,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:46,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:46,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:46,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1934 [2020-10-13 04:39:46,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:39:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:39:46,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:47,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:47,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:47,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:47,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:47,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:47,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:47,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:47,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:47,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:47,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:47,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765839788] [2020-10-13 04:39:47,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:47,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:39:47,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387080532] [2020-10-13 04:39:47,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:39:47,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:39:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:39:47,571 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 39 states. [2020-10-13 04:39:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:50,530 INFO L93 Difference]: Finished difference Result 1026 states and 1406 transitions. [2020-10-13 04:39:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:39:50,531 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-13 04:39:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:50,535 INFO L225 Difference]: With dead ends: 1026 [2020-10-13 04:39:50,535 INFO L226 Difference]: Without dead ends: 985 [2020-10-13 04:39:50,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:39:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-13 04:39:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 120. [2020-10-13 04:39:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:39:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2020-10-13 04:39:50,544 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 84 [2020-10-13 04:39:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:50,544 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2020-10-13 04:39:50,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:39:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2020-10-13 04:39:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:39:50,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:50,546 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:50,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:39:50,546 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1637466318, now seen corresponding path program 36 times [2020-10-13 04:39:50,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:50,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285527057] [2020-10-13 04:39:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:50,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:52,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2084 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:39:52,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:53,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:53,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:53,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:53,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:53,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:53,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:53,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285527057] [2020-10-13 04:39:53,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:53,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:39:53,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100154337] [2020-10-13 04:39:53,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:39:53,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:53,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:39:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:39:53,505 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 40 states. [2020-10-13 04:39:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:56,860 INFO L93 Difference]: Finished difference Result 1052 states and 1442 transitions. [2020-10-13 04:39:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:39:56,861 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-13 04:39:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:56,865 INFO L225 Difference]: With dead ends: 1052 [2020-10-13 04:39:56,865 INFO L226 Difference]: Without dead ends: 1011 [2020-10-13 04:39:56,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:39:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-10-13 04:39:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 122. [2020-10-13 04:39:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:39:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-13 04:39:56,877 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 86 [2020-10-13 04:39:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:56,877 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-13 04:39:56,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:39:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-13 04:39:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 04:39:56,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:56,878 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:56,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:39:56,879 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1233403436, now seen corresponding path program 37 times [2020-10-13 04:39:56,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:56,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661108269] [2020-10-13 04:39:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:56,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:56,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:59,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:59,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:39:59,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:59,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2183 [2020-10-13 04:39:59,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:39:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:39:59,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:59,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:59,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:59,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:59,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:59,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:59,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:59,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:59,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:59,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:59,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:59,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:59,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661108269] [2020-10-13 04:39:59,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:59,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:39:59,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630991032] [2020-10-13 04:39:59,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:39:59,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:39:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:39:59,989 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 41 states. [2020-10-13 04:40:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:02,719 INFO L93 Difference]: Finished difference Result 1078 states and 1478 transitions. [2020-10-13 04:40:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:40:02,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-13 04:40:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:02,723 INFO L225 Difference]: With dead ends: 1078 [2020-10-13 04:40:02,724 INFO L226 Difference]: Without dead ends: 1037 [2020-10-13 04:40:02,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:40:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2020-10-13 04:40:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 124. [2020-10-13 04:40:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:40:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2020-10-13 04:40:02,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 88 [2020-10-13 04:40:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:02,736 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2020-10-13 04:40:02,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:40:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2020-10-13 04:40:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:40:02,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:02,737 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:02,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:40:02,737 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash 523969526, now seen corresponding path program 38 times [2020-10-13 04:40:02,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:02,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337731053] [2020-10-13 04:40:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:05,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:05,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2367 [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:40:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:06,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:06,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:06,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:06,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:06,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337731053] [2020-10-13 04:40:06,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:06,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:40:06,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921438872] [2020-10-13 04:40:06,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:40:06,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:40:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:40:06,055 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 42 states. [2020-10-13 04:40:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:09,710 INFO L93 Difference]: Finished difference Result 1104 states and 1514 transitions. [2020-10-13 04:40:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:40:09,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-13 04:40:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:09,714 INFO L225 Difference]: With dead ends: 1104 [2020-10-13 04:40:09,715 INFO L226 Difference]: Without dead ends: 1063 [2020-10-13 04:40:09,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:40:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2020-10-13 04:40:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 126. [2020-10-13 04:40:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:40:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-10-13 04:40:09,729 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 90 [2020-10-13 04:40:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:09,729 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-10-13 04:40:09,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:40:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-10-13 04:40:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:40:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:09,731 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:09,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:40:09,731 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1437238680, now seen corresponding path program 39 times [2020-10-13 04:40:09,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:09,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722193217] [2020-10-13 04:40:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:12,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2546 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:40:12,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:13,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:13,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:13,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:13,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:40:13,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:13,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:13,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:13,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:13,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:13,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722193217] [2020-10-13 04:40:13,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:13,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:40:13,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975140126] [2020-10-13 04:40:13,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:40:13,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:40:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:40:13,321 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 43 states. [2020-10-13 04:40:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:17,163 INFO L93 Difference]: Finished difference Result 1130 states and 1550 transitions. [2020-10-13 04:40:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:40:17,164 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-13 04:40:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:17,168 INFO L225 Difference]: With dead ends: 1130 [2020-10-13 04:40:17,168 INFO L226 Difference]: Without dead ends: 1089 [2020-10-13 04:40:17,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:40:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-10-13 04:40:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 128. [2020-10-13 04:40:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:40:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2020-10-13 04:40:17,180 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 92 [2020-10-13 04:40:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:17,181 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2020-10-13 04:40:17,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:40:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2020-10-13 04:40:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:40:17,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:17,182 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:17,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:40:17,182 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1379400006, now seen corresponding path program 40 times [2020-10-13 04:40:17,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:17,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447322694] [2020-10-13 04:40:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:19,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:40:19,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:19,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2725 [2020-10-13 04:40:19,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:19,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:40:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:40:19,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:20,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:20,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:20,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:20,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:20,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:20,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:20,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:20,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:20,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447322694] [2020-10-13 04:40:20,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:20,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:40:20,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697934171] [2020-10-13 04:40:20,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:40:20,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:40:20,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:40:20,964 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 44 states. [2020-10-13 04:40:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:24,930 INFO L93 Difference]: Finished difference Result 1156 states and 1586 transitions. [2020-10-13 04:40:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:40:24,930 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-13 04:40:24,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:24,936 INFO L225 Difference]: With dead ends: 1156 [2020-10-13 04:40:24,936 INFO L226 Difference]: Without dead ends: 1115 [2020-10-13 04:40:24,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:40:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-10-13 04:40:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 130. [2020-10-13 04:40:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:40:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2020-10-13 04:40:24,947 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 94 [2020-10-13 04:40:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:24,947 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2020-10-13 04:40:24,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:40:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2020-10-13 04:40:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:40:24,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:24,949 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:24,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:40:24,949 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1955186524, now seen corresponding path program 41 times [2020-10-13 04:40:24,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:24,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286434065] [2020-10-13 04:40:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:25,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:27,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:27,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:40:27,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:27,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2799 [2020-10-13 04:40:27,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:40:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:40:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:28,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:28,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:28,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:28,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:28,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:28,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:28,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:28,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:40:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:28,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286434065] [2020-10-13 04:40:28,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:28,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:40:28,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43435676] [2020-10-13 04:40:28,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:40:28,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:40:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:40:28,846 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand 45 states. [2020-10-13 04:40:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:33,104 INFO L93 Difference]: Finished difference Result 1182 states and 1622 transitions. [2020-10-13 04:40:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:40:33,105 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-13 04:40:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:33,111 INFO L225 Difference]: With dead ends: 1182 [2020-10-13 04:40:33,111 INFO L226 Difference]: Without dead ends: 1141 [2020-10-13 04:40:33,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:40:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-10-13 04:40:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 132. [2020-10-13 04:40:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:40:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-13 04:40:33,123 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 96 [2020-10-13 04:40:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:33,123 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-13 04:40:33,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:40:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-13 04:40:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:40:33,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:33,124 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:33,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:40:33,125 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1847728258, now seen corresponding path program 42 times [2020-10-13 04:40:33,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:33,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20844387] [2020-10-13 04:40:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:33,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:33,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:36,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:36,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:40:36,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:36,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3122 [2020-10-13 04:40:36,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:36,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:40:36,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:36,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:40:36,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:37,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:37,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:37,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:37,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20844387] [2020-10-13 04:40:37,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:37,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:40:37,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530999960] [2020-10-13 04:40:37,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:40:37,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:40:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:40:37,422 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 46 states. [2020-10-13 04:40:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:41,967 INFO L93 Difference]: Finished difference Result 1208 states and 1658 transitions. [2020-10-13 04:40:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:40:41,968 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-13 04:40:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:41,973 INFO L225 Difference]: With dead ends: 1208 [2020-10-13 04:40:41,973 INFO L226 Difference]: Without dead ends: 1167 [2020-10-13 04:40:41,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:40:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-10-13 04:40:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 134. [2020-10-13 04:40:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 04:40:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2020-10-13 04:40:41,986 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 98 [2020-10-13 04:40:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:41,986 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2020-10-13 04:40:41,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:40:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2020-10-13 04:40:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:40:41,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:41,987 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:41,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:40:41,988 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1431664864, now seen corresponding path program 43 times [2020-10-13 04:40:41,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:41,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832538648] [2020-10-13 04:40:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:45,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:45,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:40:45,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3538 [2020-10-13 04:40:45,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:40:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:40:45,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:46,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:46,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:46,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:46,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:46,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832538648] [2020-10-13 04:40:46,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:46,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:40:46,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519920588] [2020-10-13 04:40:46,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:40:46,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:40:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:40:46,764 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 47 states. [2020-10-13 04:40:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:50,795 INFO L93 Difference]: Finished difference Result 1234 states and 1694 transitions. [2020-10-13 04:40:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:40:50,796 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-13 04:40:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:50,800 INFO L225 Difference]: With dead ends: 1234 [2020-10-13 04:40:50,801 INFO L226 Difference]: Without dead ends: 1193 [2020-10-13 04:40:50,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:40:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-10-13 04:40:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 136. [2020-10-13 04:40:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:40:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2020-10-13 04:40:50,817 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 100 [2020-10-13 04:40:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:50,817 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2020-10-13 04:40:50,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:40:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2020-10-13 04:40:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:50,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:50,818 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:50,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:40:50,818 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1026701758, now seen corresponding path program 44 times [2020-10-13 04:40:50,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:50,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835668717] [2020-10-13 04:40:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:50,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:54,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:54,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:54,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:54,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4049 [2020-10-13 04:40:54,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:54,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:40:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:40:54,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:56,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:56,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:56,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:56,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:56,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835668717] [2020-10-13 04:40:56,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:56,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:40:56,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31578103] [2020-10-13 04:40:56,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:40:56,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:40:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:40:56,134 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 48 states. [2020-10-13 04:41:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:01,227 INFO L93 Difference]: Finished difference Result 1260 states and 1730 transitions. [2020-10-13 04:41:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:41:01,228 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-13 04:41:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:01,232 INFO L225 Difference]: With dead ends: 1260 [2020-10-13 04:41:01,233 INFO L226 Difference]: Without dead ends: 1219 [2020-10-13 04:41:01,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:41:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2020-10-13 04:41:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 138. [2020-10-13 04:41:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:41:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2020-10-13 04:41:01,256 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 102 [2020-10-13 04:41:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:01,256 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2020-10-13 04:41:01,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:41:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2020-10-13 04:41:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:41:01,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:01,257 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:01,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:41:01,258 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1595786468, now seen corresponding path program 45 times [2020-10-13 04:41:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:01,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615732665] [2020-10-13 04:41:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:01,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:01,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:05,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:05,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:41:05,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:05,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4177 [2020-10-13 04:41:05,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:41:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 04:41:05,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:06,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:06,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:06,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:06,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:06,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615732665] [2020-10-13 04:41:06,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:06,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 04:41:06,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201336964] [2020-10-13 04:41:06,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 04:41:06,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:06,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 04:41:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:41:06,736 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 49 states. [2020-10-13 04:41:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:11,817 INFO L93 Difference]: Finished difference Result 1286 states and 1766 transitions. [2020-10-13 04:41:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:41:11,817 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-13 04:41:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:11,821 INFO L225 Difference]: With dead ends: 1286 [2020-10-13 04:41:11,822 INFO L226 Difference]: Without dead ends: 1245 [2020-10-13 04:41:11,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:41:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2020-10-13 04:41:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 140. [2020-10-13 04:41:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:41:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-10-13 04:41:11,834 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 104 [2020-10-13 04:41:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:11,835 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-10-13 04:41:11,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 04:41:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-10-13 04:41:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:41:11,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:11,836 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:11,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:41:11,836 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash 661168902, now seen corresponding path program 46 times [2020-10-13 04:41:11,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:11,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101366020] [2020-10-13 04:41:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:11,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:16,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:16,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:41:16,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:16,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4174 [2020-10-13 04:41:16,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:16,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:41:16,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:16,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 04:41:16,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:17,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:17,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:17,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:17,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:17,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:17,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:17,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:17,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:17,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101366020] [2020-10-13 04:41:17,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:17,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 04:41:17,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557250251] [2020-10-13 04:41:17,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 04:41:17,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 04:41:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:41:17,420 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 50 states. [2020-10-13 04:41:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:21,190 INFO L93 Difference]: Finished difference Result 1312 states and 1802 transitions. [2020-10-13 04:41:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 04:41:21,191 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-13 04:41:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:21,195 INFO L225 Difference]: With dead ends: 1312 [2020-10-13 04:41:21,195 INFO L226 Difference]: Without dead ends: 1271 [2020-10-13 04:41:21,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:41:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2020-10-13 04:41:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 142. [2020-10-13 04:41:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:41:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-10-13 04:41:21,212 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 106 [2020-10-13 04:41:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:21,213 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-10-13 04:41:21,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 04:41:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-10-13 04:41:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 04:41:21,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:21,214 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:21,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:41:21,214 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash 141852840, now seen corresponding path program 47 times [2020-10-13 04:41:21,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:21,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135384289] [2020-10-13 04:41:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:21,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:25,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:25,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:41:25,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4462 [2020-10-13 04:41:25,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 04:41:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 04:41:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:27,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:27,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:27,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:27,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135384289] [2020-10-13 04:41:27,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:27,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 04:41:27,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991714956] [2020-10-13 04:41:27,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 04:41:27,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 04:41:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:41:27,127 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 51 states. [2020-10-13 04:41:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:31,111 INFO L93 Difference]: Finished difference Result 1338 states and 1838 transitions. [2020-10-13 04:41:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 04:41:31,112 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-13 04:41:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:31,116 INFO L225 Difference]: With dead ends: 1338 [2020-10-13 04:41:31,116 INFO L226 Difference]: Without dead ends: 1297 [2020-10-13 04:41:31,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:41:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-10-13 04:41:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 144. [2020-10-13 04:41:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:41:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-13 04:41:31,135 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 108 [2020-10-13 04:41:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:31,135 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-13 04:41:31,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 04:41:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-13 04:41:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:41:31,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:31,136 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:31,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:41:31,137 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash -704676406, now seen corresponding path program 48 times [2020-10-13 04:41:31,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:31,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385056609] [2020-10-13 04:41:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:35,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:35,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:41:35,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:35,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4751 [2020-10-13 04:41:35,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 04:41:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 04:41:35,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:37,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:37,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:37,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:37,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:37,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:37,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:37,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:37,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385056609] [2020-10-13 04:41:37,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:37,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 04:41:37,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157856740] [2020-10-13 04:41:37,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 04:41:37,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 04:41:37,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:41:37,404 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 52 states. [2020-10-13 04:41:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:41,591 INFO L93 Difference]: Finished difference Result 1364 states and 1874 transitions. [2020-10-13 04:41:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 04:41:41,591 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-13 04:41:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:41,598 INFO L225 Difference]: With dead ends: 1364 [2020-10-13 04:41:41,598 INFO L226 Difference]: Without dead ends: 1323 [2020-10-13 04:41:41,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:41:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-10-13 04:41:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 146. [2020-10-13 04:41:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:41:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2020-10-13 04:41:41,617 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 110 [2020-10-13 04:41:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:41,618 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2020-10-13 04:41:41,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 04:41:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2020-10-13 04:41:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:41:41,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:41,619 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:41,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:41:41,619 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:41,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1824504428, now seen corresponding path program 49 times [2020-10-13 04:41:41,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:41,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740817550] [2020-10-13 04:41:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:41,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:41,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 04:41:46,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 04:41:46,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:48,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:48,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:48,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:48,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740817550] [2020-10-13 04:41:48,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:48,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 04:41:48,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22782938] [2020-10-13 04:41:48,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 04:41:48,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 04:41:48,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:41:48,285 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand 53 states. [2020-10-13 04:41:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:54,526 INFO L93 Difference]: Finished difference Result 1390 states and 1910 transitions. [2020-10-13 04:41:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 04:41:54,527 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-13 04:41:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:54,530 INFO L225 Difference]: With dead ends: 1390 [2020-10-13 04:41:54,530 INFO L226 Difference]: Without dead ends: 1349 [2020-10-13 04:41:54,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:41:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2020-10-13 04:41:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 148. [2020-10-13 04:41:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:41:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2020-10-13 04:41:54,546 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 112 [2020-10-13 04:41:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:54,547 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2020-10-13 04:41:54,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 04:41:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2020-10-13 04:41:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:41:54,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:54,548 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:54,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:41:54,548 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1415796366, now seen corresponding path program 50 times [2020-10-13 04:41:54,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:54,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687312259] [2020-10-13 04:41:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:54,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 04:41:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:01,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:01,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:01,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:01,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687312259] [2020-10-13 04:42:01,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:01,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 04:42:01,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417580750] [2020-10-13 04:42:01,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 04:42:01,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 04:42:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 04:42:01,234 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand 54 states.