/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:46:19,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:46:19,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:46:19,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:46:19,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:46:19,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:46:19,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:46:19,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:46:19,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:46:19,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:46:19,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:46:19,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:46:19,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:46:19,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:46:19,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:46:19,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:46:19,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:46:19,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:46:19,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:46:19,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:46:19,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:46:19,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:46:19,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:46:19,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:46:19,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:46:19,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:46:19,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:46:19,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:46:19,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:46:19,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:46:19,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:46:19,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:46:19,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:46:19,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:46:19,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:46:19,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:46:19,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:46:19,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:46:19,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:46:19,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:46:19,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:46:19,712 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 23:46:19,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:46:19,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:46:19,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:46:19,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:46:19,736 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:46:19,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:46:19,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:46:19,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:46:19,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:46:19,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:46:19,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:46:19,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:46:19,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:46:19,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:46:19,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:46:19,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:46:19,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:46:19,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:46:19,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:46:19,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:46:19,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:46:19,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:46:19,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:46:19,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:46:19,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:46:19,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:46:19,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:46:19,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:46:19,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:46:19,740 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:46:20,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:46:20,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:46:20,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:46:20,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:46:20,090 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:46:20,091 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2020-10-13 23:46:20,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72fcc6d6f/cb94c0a4d0f4435381d2d4f877c22148/FLAG0de4a0162 [2020-10-13 23:46:20,624 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:46:20,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2020-10-13 23:46:20,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72fcc6d6f/cb94c0a4d0f4435381d2d4f877c22148/FLAG0de4a0162 [2020-10-13 23:46:21,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72fcc6d6f/cb94c0a4d0f4435381d2d4f877c22148 [2020-10-13 23:46:21,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:46:21,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:46:21,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:46:21,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:46:21,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:46:21,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21, skipping insertion in model container [2020-10-13 23:46:21,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:46:21,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:46:21,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:46:21,239 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:46:21,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:46:21,292 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:46:21,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21 WrapperNode [2020-10-13 23:46:21,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:46:21,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:46:21,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:46:21,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:46:21,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (1/1) ... [2020-10-13 23:46:21,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:46:21,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:46:21,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:46:21,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:46:21,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (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 23:46:21,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:46:21,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:46:21,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:46:21,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:46:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:46:21,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:46:21,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:46:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:46:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:46:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:46:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:46:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:46:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:46:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:46:21,828 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:46:21,829 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:46:21,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:46:21 BoogieIcfgContainer [2020-10-13 23:46:21,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:46:21,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:46:21,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:46:21,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:46:21,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:46:21" (1/3) ... [2020-10-13 23:46:21,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f51fd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:46:21, skipping insertion in model container [2020-10-13 23:46:21,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:21" (2/3) ... [2020-10-13 23:46:21,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f51fd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:46:21, skipping insertion in model container [2020-10-13 23:46:21,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:46:21" (3/3) ... [2020-10-13 23:46:21,866 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2020-10-13 23:46:21,893 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:46:21,912 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:46:21,939 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:46:21,962 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:46:21,962 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:46:21,962 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:46:21,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:46:21,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:46:21,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:46:21,963 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:46:21,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:46:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 23:46:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:46:21,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:21,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:21,986 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-13 23:46:21,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:22,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156028393] [2020-10-13 23:46:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:22,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:46:22,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:22,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-13 23:46:22,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:22,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:46:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:22,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:46:22,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:22,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:22,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:22,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:46:22,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:22,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:22,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:22,411 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 23:46:22,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156028393] [2020-10-13 23:46:22,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:46:22,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:46:22,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863827874] [2020-10-13 23:46:22,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:46:22,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:46:22,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:46:22,446 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 23:46:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:22,535 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 23:46:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:46:22,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:46:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:22,546 INFO L225 Difference]: With dead ends: 41 [2020-10-13 23:46:22,547 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 23:46:22,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:46:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 23:46:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 23:46:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 23:46:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 23:46:22,584 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 23:46:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:22,584 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 23:46:22,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:46:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 23:46:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:46:22,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:22,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:22,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:46:22,586 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:22,587 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2020-10-13 23:46:22,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:22,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608155612] [2020-10-13 23:46:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:22,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:22,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:46:22,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:22,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-13 23:46:22,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:22,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:46:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:46:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:22,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:22,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:22,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:46:22,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:22,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:22,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:22,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:46:22,827 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 23:46:22,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608155612] [2020-10-13 23:46:22,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:46:22,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:46:22,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506374572] [2020-10-13 23:46:22,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:46:22,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:22,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:46:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:46:22,835 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 23:46:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:22,916 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 23:46:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:46:22,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:46:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:22,917 INFO L225 Difference]: With dead ends: 32 [2020-10-13 23:46:22,918 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 23:46:22,919 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 23:46:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 23:46:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 23:46:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 23:46:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 23:46:22,931 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-13 23:46:22,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:22,932 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 23:46:22,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:46:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 23:46:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:46:22,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:22,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:22,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:46:22,934 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2020-10-13 23:46:22,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:22,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335818902] [2020-10-13 23:46:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:22,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:23,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:46:23,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-13 23:46:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:23,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:46:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:46:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:46:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:23,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:23,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:23,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:23,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:23,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:46:23,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:23,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:23,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:23,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:23,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:23,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:46:23,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335818902] [2020-10-13 23:46:23,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:46:23,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:46:23,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003905669] [2020-10-13 23:46:23,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:46:23,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:46:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:46:23,223 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 23:46:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:23,289 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 23:46:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:46:23,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:46:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:23,293 INFO L225 Difference]: With dead ends: 34 [2020-10-13 23:46:23,293 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:46:23,294 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 23:46:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:46:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 23:46:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:46:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:46:23,305 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-13 23:46:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:23,305 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:46:23,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:46:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:46:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:46:23,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:23,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:23,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:46:23,307 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-13 23:46:23,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:23,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825489748] [2020-10-13 23:46:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:23,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:23,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:46:23,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:23,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-13 23:46:23,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:23,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:46:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:46:23,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:46:23,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:46:23,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:23,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:23,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:23,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:23,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:46:23,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:23,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:23,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:23,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:46:23,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825489748] [2020-10-13 23:46:23,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:23,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:46:23,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969944657] [2020-10-13 23:46:23,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:46:23,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:46:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:46:23,776 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 23:46:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:23,909 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-13 23:46:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:46:23,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 23:46:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:23,913 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:46:23,913 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:46:23,914 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 23:46:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:46:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 23:46:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:46:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 23:46:23,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-13 23:46:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:23,924 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 23:46:23,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:46:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 23:46:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:46:23,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:23,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:23,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:46:23,927 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:23,928 INFO L82 PathProgramCache]: Analyzing trace with hash -406079354, now seen corresponding path program 2 times [2020-10-13 23:46:23,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:23,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647693947] [2020-10-13 23:46:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:23,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:46:24,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-13 23:46:24,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:46:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:46:24,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:46:24,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:24,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:24,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:24,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 23:46:24,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647693947] [2020-10-13 23:46:24,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:24,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:46:24,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909134628] [2020-10-13 23:46:24,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:46:24,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:46:24,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:46:24,440 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 23:46:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:24,548 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 23:46:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:46:24,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 23:46:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:24,550 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:46:24,550 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:46:24,551 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 23:46:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:46:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 23:46:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:46:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 23:46:24,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-13 23:46:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:24,557 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 23:46:24,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:46:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 23:46:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:46:24,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:24,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:24,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:46:24,559 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash -820912923, now seen corresponding path program 3 times [2020-10-13 23:46:24,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:24,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370711912] [2020-10-13 23:46:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:25,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:25,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:46:25,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:25,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-13 23:46:25,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:25,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:46:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:46:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:46:25,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:25,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:25,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:25,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:25,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:25,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:46:25,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:25,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:46:25,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370711912] [2020-10-13 23:46:25,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:25,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:46:25,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499680832] [2020-10-13 23:46:25,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:46:25,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:46:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:46:25,192 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 23:46:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:25,408 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 23:46:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:46:25,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 23:46:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:25,411 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:46:25,413 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:46:25,414 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 23:46:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:46:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-13 23:46:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:46:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 23:46:25,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-13 23:46:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:25,430 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 23:46:25,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:46:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 23:46:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:46:25,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:25,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:25,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:46:25,436 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1912151398, now seen corresponding path program 4 times [2020-10-13 23:46:25,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:25,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927918192] [2020-10-13 23:46:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:25,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:26,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:26,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:46:26,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1287 [2020-10-13 23:46:26,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:26,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:46:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:46:26,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:26,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:26,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:26,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:26,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:46:26,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:26,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:26,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:46:26,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927918192] [2020-10-13 23:46:26,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:26,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:46:26,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727098832] [2020-10-13 23:46:26,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:46:26,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:46:26,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:46:26,862 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 23:46:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:27,037 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-13 23:46:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:46:27,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 23:46:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:27,039 INFO L225 Difference]: With dead ends: 47 [2020-10-13 23:46:27,039 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:46:27,041 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 23:46:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:46:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-13 23:46:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:46:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 23:46:27,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-13 23:46:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:27,055 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 23:46:27,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:46:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 23:46:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:46:27,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:27,057 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:27,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:46:27,057 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 911814026, now seen corresponding path program 5 times [2020-10-13 23:46:27,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:27,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952237866] [2020-10-13 23:46:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:27,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:27,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:28,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:28,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:46:28,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:28,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1423 [2020-10-13 23:46:28,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:28,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:46:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:46:28,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:28,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:28,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:28,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:28,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:28,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:28,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:28,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:28,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:28,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:28,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:46:28,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952237866] [2020-10-13 23:46:28,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:28,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:46:28,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069426748] [2020-10-13 23:46:28,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:46:28,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:46:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:46:28,595 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-13 23:46:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:28,692 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-13 23:46:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:46:28,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 23:46:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:28,694 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:46:28,694 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:46:28,695 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 23:46:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:46:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-13 23:46:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:46:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 23:46:28,700 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-13 23:46:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:28,701 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 23:46:28,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:46:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 23:46:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:46:28,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:28,702 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:28,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:46:28,702 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 6 times [2020-10-13 23:46:28,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:28,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737430914] [2020-10-13 23:46:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:28,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:29,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:30,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:30,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:46:30,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-13 23:46:30,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:30,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:30,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:46:30,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:30,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:46:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:30,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:30,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:30,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:30,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:30,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:30,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:30,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:30,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:30,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:46:30,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737430914] [2020-10-13 23:46:30,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:30,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:46:30,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455541882] [2020-10-13 23:46:30,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:46:30,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:30,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:46:30,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:46:30,304 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-13 23:46:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:30,405 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-13 23:46:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:46:30,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 23:46:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:30,407 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:46:30,407 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:46:30,408 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 23:46:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:46:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-10-13 23:46:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:46:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 23:46:30,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-13 23:46:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:30,413 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 23:46:30,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:46:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 23:46:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:46:30,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:30,414 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:30,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:46:30,415 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash 714586378, now seen corresponding path program 7 times [2020-10-13 23:46:30,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:30,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357389300] [2020-10-13 23:46:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:30,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:30,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:32,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:32,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:46:32,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-13 23:46:32,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:32,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:32,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:46:32,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:46:32,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:46:32,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:32,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:32,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:32,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:32,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:32,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:32,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:32,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:32,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:32,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:32,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:32,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:32,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:46:32,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357389300] [2020-10-13 23:46:32,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:32,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:46:32,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570159004] [2020-10-13 23:46:32,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:46:32,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:46:32,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:46:32,139 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-13 23:46:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:32,263 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-13 23:46:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:46:32,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-13 23:46:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:32,264 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:46:32,265 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:46:32,265 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 23:46:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:46:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-13 23:46:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:46:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 23:46:32,270 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-13 23:46:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:32,271 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 23:46:32,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:46:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 23:46:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:46:32,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:32,272 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:32,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:46:32,273 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1440519547, now seen corresponding path program 8 times [2020-10-13 23:46:32,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:32,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516262691] [2020-10-13 23:46:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:32,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:32,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:32,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:34,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:46:34,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1976 [2020-10-13 23:46:34,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:34,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:46:34,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:34,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:46:34,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:34,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:34,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:34,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:34,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:34,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:34,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:34,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:34,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:46:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:46:34,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516262691] [2020-10-13 23:46:34,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:34,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:46:34,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204536460] [2020-10-13 23:46:34,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:46:34,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:34,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:46:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:46:34,374 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-13 23:46:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:34,528 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-13 23:46:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:46:34,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 23:46:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:34,529 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:46:34,529 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:46:34,530 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 23:46:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:46:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-13 23:46:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:46:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 23:46:34,535 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-13 23:46:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:34,536 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 23:46:34,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:46:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 23:46:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:46:34,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:34,540 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:34,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:46:34,540 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 569821353, now seen corresponding path program 9 times [2020-10-13 23:46:34,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:34,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981975000] [2020-10-13 23:46:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:34,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:46:36,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1989 [2020-10-13 23:46:36,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:46:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:46:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:46:36,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:36,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:36,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:36,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:36,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:36,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:46:36,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981975000] [2020-10-13 23:46:36,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:36,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:46:36,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149791679] [2020-10-13 23:46:36,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:46:36,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:46:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:46:36,622 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-13 23:46:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:36,769 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-13 23:46:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:46:36,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-13 23:46:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:36,771 INFO L225 Difference]: With dead ends: 61 [2020-10-13 23:46:36,771 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:46:36,772 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 23:46:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:46:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-10-13 23:46:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:46:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 23:46:36,777 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-13 23:46:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:36,778 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 23:46:36,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:46:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 23:46:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:46:36,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:36,779 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:36,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:46:36,780 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1633268026, now seen corresponding path program 10 times [2020-10-13 23:46:36,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:36,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335327321] [2020-10-13 23:46:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:38,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:46:38,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1722 [2020-10-13 23:46:38,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:38,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:38,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:46:38,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:38,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:46:38,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:38,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:38,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:38,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:38,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:38,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:38,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:38,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:38,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:46:38,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335327321] [2020-10-13 23:46:38,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:38,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:46:38,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447030924] [2020-10-13 23:46:38,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:46:38,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:38,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:46:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:46:38,681 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-13 23:46:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:38,796 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 23:46:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:46:38,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 23:46:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:38,798 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:46:38,798 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:46:38,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:46:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:46:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-13 23:46:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:46:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 23:46:38,806 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-13 23:46:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:38,808 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 23:46:38,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:46:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 23:46:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:46:38,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:38,809 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:38,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:46:38,809 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1864020970, now seen corresponding path program 11 times [2020-10-13 23:46:38,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:38,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332095062] [2020-10-13 23:46:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:38,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:40,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:40,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:46:40,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:40,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2130 [2020-10-13 23:46:40,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:40,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:46:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:46:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:41,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:41,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:41,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:41,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:41,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:41,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:41,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:41,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:41,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:41,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:46:41,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332095062] [2020-10-13 23:46:41,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:41,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:46:41,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660885064] [2020-10-13 23:46:41,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:46:41,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:46:41,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:46:41,090 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-13 23:46:41,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:41,248 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-10-13 23:46:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:46:41,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-13 23:46:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:41,250 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:46:41,250 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:46:41,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:46:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:46:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-10-13 23:46:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:46:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 23:46:41,255 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-13 23:46:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:41,256 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 23:46:41,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:46:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 23:46:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:46:41,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:41,257 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:41,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:46:41,257 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 12 times [2020-10-13 23:46:41,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:41,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261487033] [2020-10-13 23:46:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:43,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:43,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:46:43,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:43,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2063 [2020-10-13 23:46:43,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:43,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:43,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:46:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:46:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:46:43,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:43,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:43,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:43,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:43,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:43,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:43,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:43,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 23:46:43,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261487033] [2020-10-13 23:46:43,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:43,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:46:43,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49294421] [2020-10-13 23:46:43,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:46:43,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:46:43,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:46:43,425 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-13 23:46:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:43,590 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-13 23:46:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:46:43,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-13 23:46:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:43,592 INFO L225 Difference]: With dead ends: 67 [2020-10-13 23:46:43,592 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:46:43,593 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 23:46:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:46:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2020-10-13 23:46:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:46:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 23:46:43,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-13 23:46:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:43,599 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 23:46:43,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:46:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 23:46:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:46:43,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:43,600 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:43,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:46:43,600 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 13 times [2020-10-13 23:46:43,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:43,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925084867] [2020-10-13 23:46:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:43,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:44,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:46,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:46:46,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:46,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2428 [2020-10-13 23:46:46,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:46,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:46,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:46:46,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:46,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:46:46,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:46,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:46,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:46,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:46,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:46,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:46,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:46,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:46,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:46:46,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925084867] [2020-10-13 23:46:46,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:46,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:46:46,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758614083] [2020-10-13 23:46:46,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:46:46,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:46:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:46:46,195 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-10-13 23:46:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:46,363 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-13 23:46:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:46:46,363 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-13 23:46:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:46,364 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:46:46,364 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:46:46,365 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 23:46:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:46:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-10-13 23:46:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:46:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 23:46:46,370 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-13 23:46:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:46,370 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 23:46:46,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:46:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 23:46:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:46:46,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:46,371 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:46,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:46:46,372 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1812639707, now seen corresponding path program 14 times [2020-10-13 23:46:46,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:46,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900317420] [2020-10-13 23:46:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:49,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:49,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:46:49,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-10-13 23:46:49,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:49,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:46:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:46:49,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:46:49,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:49,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:49,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:49,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:49,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:49,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 23:46:49,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900317420] [2020-10-13 23:46:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:49,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:46:49,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699864935] [2020-10-13 23:46:49,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:46:49,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:46:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:46:49,120 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-10-13 23:46:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:49,306 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-13 23:46:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:46:49,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-13 23:46:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:49,307 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:46:49,308 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:46:49,308 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 23:46:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:46:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2020-10-13 23:46:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:46:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 23:46:49,314 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-10-13 23:46:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:49,314 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 23:46:49,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:46:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 23:46:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:46:49,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:49,315 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:49,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:46:49,316 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1819850442, now seen corresponding path program 15 times [2020-10-13 23:46:49,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:49,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936111858] [2020-10-13 23:46:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:50,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:51,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:51,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:46:51,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:51,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2521 [2020-10-13 23:46:51,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:51,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:46:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:46:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:52,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:52,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:52,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:52,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:52,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:52,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:52,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:52,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:46:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936111858] [2020-10-13 23:46:52,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:52,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:46:52,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859789806] [2020-10-13 23:46:52,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:46:52,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:46:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:46:52,024 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-13 23:46:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:52,168 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-13 23:46:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:46:52,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-13 23:46:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:52,170 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:46:52,170 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 23:46:52,171 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 23:46:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 23:46:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-10-13 23:46:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:46:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 23:46:52,176 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-13 23:46:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:52,176 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 23:46:52,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:46:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 23:46:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:46:52,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:52,177 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:52,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:46:52,178 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1533667366, now seen corresponding path program 16 times [2020-10-13 23:46:52,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:52,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920010228] [2020-10-13 23:46:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:54,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2591 [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:46:54,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:46:54,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:54,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:54,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:54,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:54,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:54,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:54,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:54,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:54,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:54,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:46:54,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920010228] [2020-10-13 23:46:54,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:54,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:46:54,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478504382] [2020-10-13 23:46:54,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:46:54,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:46:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:46:54,974 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 16 states. [2020-10-13 23:46:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:55,121 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-13 23:46:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:46:55,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-13 23:46:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:55,122 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:46:55,122 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:46:55,123 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 23:46:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:46:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-13 23:46:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:46:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 23:46:55,131 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2020-10-13 23:46:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:55,131 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 23:46:55,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:46:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 23:46:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:46:55,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:55,132 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:55,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:46:55,133 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1251926602, now seen corresponding path program 17 times [2020-10-13 23:46:55,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:55,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617112441] [2020-10-13 23:46:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:55,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:55,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:56,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:58,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:58,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:46:58,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:58,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3666 [2020-10-13 23:46:58,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:58,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:46:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:46:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:46:58,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:58,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:58,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:58,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:58,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:58,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 23:46:58,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617112441] [2020-10-13 23:46:58,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:58,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:46:58,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228729840] [2020-10-13 23:46:58,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:46:58,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:46:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:46:58,944 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2020-10-13 23:46:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:59,152 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-13 23:46:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:46:59,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 23:46:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:59,153 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:46:59,153 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:46:59,154 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 23:46:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:46:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2020-10-13 23:46:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:46:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 23:46:59,161 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-13 23:46:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:59,162 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 23:46:59,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:46:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 23:46:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:46:59,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:59,163 INFO L422 BasicCegarLoop]: trace histogram [13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:59,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:46:59,163 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1962841787, now seen corresponding path program 18 times [2020-10-13 23:46:59,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:59,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095669947] [2020-10-13 23:46:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:59,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:01,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:02,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:02,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3379 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:47:02,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:02,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:02,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:02,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:02,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:47:02,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095669947] [2020-10-13 23:47:02,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:02,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:47:02,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111543693] [2020-10-13 23:47:02,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:47:02,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:02,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:47:02,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:47:02,754 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 17 states. [2020-10-13 23:47:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:02,974 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-13 23:47:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:47:02,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-13 23:47:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:02,976 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:47:02,976 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:47:02,976 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 23:47:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:47:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-13 23:47:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:47:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-13 23:47:02,980 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-10-13 23:47:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:02,981 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-13 23:47:02,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:47:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-13 23:47:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:47:02,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:02,982 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:02,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:47:02,982 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2132776343, now seen corresponding path program 19 times [2020-10-13 23:47:02,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:02,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036695283] [2020-10-13 23:47:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:03,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:03,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:04,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:06,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:06,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:47:06,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:06,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3797 [2020-10-13 23:47:06,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:06,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:47:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:47:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:47:06,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:06,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:06,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:06,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:06,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:47:06,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:06,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:06,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:06,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 23:47:06,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036695283] [2020-10-13 23:47:06,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:06,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:47:06,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518191888] [2020-10-13 23:47:06,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:47:06,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:47:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:47:06,929 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-10-13 23:47:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:07,167 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-13 23:47:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:47:07,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-13 23:47:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:07,170 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:47:07,170 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:47:07,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:47:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:47:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-10-13 23:47:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:47:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-13 23:47:07,176 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2020-10-13 23:47:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:07,176 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-13 23:47:07,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:47:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-13 23:47:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:47:07,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:07,177 INFO L422 BasicCegarLoop]: trace histogram [14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:07,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:47:07,178 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash 485549318, now seen corresponding path program 20 times [2020-10-13 23:47:07,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:07,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151669974] [2020-10-13 23:47:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:11,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:11,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:47:11,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:11,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3925 [2020-10-13 23:47:11,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:11,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:11,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:47:11,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:11,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:47:11,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:11,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:11,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:11,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:11,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:11,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:11,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:11,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:11,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 23:47:11,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151669974] [2020-10-13 23:47:11,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:11,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:47:11,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089388330] [2020-10-13 23:47:11,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:47:11,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:47:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:47:11,337 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2020-10-13 23:47:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:11,559 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-13 23:47:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:47:11,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-13 23:47:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:11,562 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:47:11,562 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:47:11,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:47:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:47:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2020-10-13 23:47:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:47:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 23:47:11,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2020-10-13 23:47:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:11,569 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 23:47:11,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:47:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 23:47:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:47:11,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:11,570 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:11,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:47:11,570 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:11,571 INFO L82 PathProgramCache]: Analyzing trace with hash 387198250, now seen corresponding path program 21 times [2020-10-13 23:47:11,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:11,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648258536] [2020-10-13 23:47:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:11,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:11,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:16,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:16,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:47:16,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:16,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4737 [2020-10-13 23:47:16,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:16,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:16,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:47:16,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:47:16,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:47:16,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:16,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:16,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:47:16,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648258536] [2020-10-13 23:47:16,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:16,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:47:16,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221407260] [2020-10-13 23:47:16,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:47:16,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:16,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:47:16,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:47:16,457 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2020-10-13 23:47:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:16,728 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-13 23:47:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:47:16,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 23:47:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:16,730 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:47:16,730 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:47:16,731 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 23:47:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:47:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-10-13 23:47:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:47:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 23:47:16,736 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-10-13 23:47:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:16,737 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 23:47:16,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:47:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 23:47:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:47:16,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:16,737 INFO L422 BasicCegarLoop]: trace histogram [15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:16,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:47:16,738 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1295350373, now seen corresponding path program 22 times [2020-10-13 23:47:16,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:16,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610113568] [2020-10-13 23:47:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:16,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:16,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:21,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:21,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4837 [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:21,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:47:21,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:22,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:22,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:22,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:22,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:22,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:22,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:22,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:22,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:22,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:47:22,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610113568] [2020-10-13 23:47:22,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:22,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:47:22,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349164795] [2020-10-13 23:47:22,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:47:22,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:47:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:47:22,402 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 20 states. [2020-10-13 23:47:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:23,019 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-13 23:47:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:47:23,020 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-13 23:47:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:23,022 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:47:23,022 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:47:23,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:47:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:47:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2020-10-13 23:47:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:47:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 23:47:23,036 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-10-13 23:47:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:23,036 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 23:47:23,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:47:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 23:47:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:47:23,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:23,037 INFO L422 BasicCegarLoop]: trace histogram [15, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:23,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:47:23,037 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash 413886924, now seen corresponding path program 1 times [2020-10-13 23:47:23,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:23,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45949705] [2020-10-13 23:47:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:23,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:27,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:28,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:28,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:47:28,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:28,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:28,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:28,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:28,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:28,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:28,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:28,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:28,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:47:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:28,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:28,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 23:47:28,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45949705] [2020-10-13 23:47:28,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:28,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:47:28,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347472136] [2020-10-13 23:47:28,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:47:28,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:47:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:47:28,306 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-13 23:47:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:28,563 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-13 23:47:28,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:47:28,564 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-13 23:47:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:28,565 INFO L225 Difference]: With dead ends: 91 [2020-10-13 23:47:28,565 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:47:28,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:47:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:47:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-10-13 23:47:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:47:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 23:47:28,575 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-13 23:47:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:28,575 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 23:47:28,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:47:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 23:47:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:47:28,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:28,576 INFO L422 BasicCegarLoop]: trace histogram [16, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:28,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:47:28,576 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash -670234072, now seen corresponding path program 2 times [2020-10-13 23:47:28,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:28,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133458345] [2020-10-13 23:47:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:28,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:33,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:33,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:47:33,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:33,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:33,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:33,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:33,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:33,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:33,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:33,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:33,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:33,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:47:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:33,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:33,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:33,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:33,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:33,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:33,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:33,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 23:47:33,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133458345] [2020-10-13 23:47:33,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:33,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:47:33,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079516550] [2020-10-13 23:47:33,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:47:33,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:47:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:47:33,934 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 20 states. [2020-10-13 23:47:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:34,213 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-13 23:47:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:47:34,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-13 23:47:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:34,216 INFO L225 Difference]: With dead ends: 92 [2020-10-13 23:47:34,219 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:47:34,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:47:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:47:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-13 23:47:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:47:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 23:47:34,241 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-13 23:47:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:34,241 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 23:47:34,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:47:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 23:47:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:47:34,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:34,242 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:34,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:47:34,243 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash 81753420, now seen corresponding path program 3 times [2020-10-13 23:47:34,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:34,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213743002] [2020-10-13 23:47:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:34,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:34,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:37,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:39,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:39,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:47:39,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:47:39,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:39,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:47:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:47:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:47:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:39,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:39,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:39,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:39,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:39,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:39,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:39,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:39,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:39,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:47:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:39,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:39,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:39,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:39,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:39,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:39,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:39,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-13 23:47:39,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213743002] [2020-10-13 23:47:39,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:39,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:47:39,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598071204] [2020-10-13 23:47:39,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:47:39,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:39,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:47:39,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:47:39,478 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 15 states. [2020-10-13 23:47:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:39,819 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-13 23:47:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:47:39,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 23:47:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:39,820 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:47:39,821 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:47:39,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 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 23:47:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:47:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2020-10-13 23:47:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:47:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-13 23:47:39,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2020-10-13 23:47:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:39,832 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-13 23:47:39,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:47:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-13 23:47:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:47:39,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:39,833 INFO L422 BasicCegarLoop]: trace histogram [17, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:39,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:47:39,833 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash -113069945, now seen corresponding path program 4 times [2020-10-13 23:47:39,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:39,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244229519] [2020-10-13 23:47:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:39,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:43,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:44,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:44,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:47:44,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:45,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:45,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:45,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:45,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:45,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:45,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:45,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:45,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:47:45,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:47:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:45,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:45,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:45,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:45,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:45,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:45,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:45,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:45,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:45,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:47:45,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244229519] [2020-10-13 23:47:45,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:45,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:47:45,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456854407] [2020-10-13 23:47:45,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:47:45,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:47:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:47:45,168 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-13 23:47:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:45,426 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 23:47:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:47:45,427 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-13 23:47:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:45,429 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:47:45,429 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:47:45,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 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 23:47:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:47:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-13 23:47:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:47:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 23:47:45,451 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-13 23:47:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:45,452 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 23:47:45,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:47:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 23:47:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:47:45,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:45,453 INFO L422 BasicCegarLoop]: trace histogram [18, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:45,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:47:45,457 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash 992404139, now seen corresponding path program 5 times [2020-10-13 23:47:45,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:45,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505297322] [2020-10-13 23:47:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:49,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:50,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:47:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:47:50,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:50,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:50,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:50,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:50,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:50,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:50,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:50,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:50,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:47:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:50,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:50,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:50,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:50,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:50,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:50,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:50,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-10-13 23:47:50,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505297322] [2020-10-13 23:47:50,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:50,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:47:50,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628673311] [2020-10-13 23:47:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:47:50,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:47:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:47:50,673 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 16 states. [2020-10-13 23:47:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:51,012 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-13 23:47:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:47:51,013 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-13 23:47:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:51,014 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:47:51,015 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:47:51,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 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 23:47:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:47:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-10-13 23:47:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:47:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 23:47:51,024 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-13 23:47:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:51,025 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 23:47:51,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:47:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 23:47:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:47:51,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:51,025 INFO L422 BasicCegarLoop]: trace histogram [18, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:51,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:47:51,026 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1947668728, now seen corresponding path program 6 times [2020-10-13 23:47:51,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:51,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750950223] [2020-10-13 23:47:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:51,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:55,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:56,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:47:56,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:56,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:56,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:56,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:56,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:56,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:47:56,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:56,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:56,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:47:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:56,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:56,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:56,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:56,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:56,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:56,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:47:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:47:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 17 proven. 78 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 23:47:56,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750950223] [2020-10-13 23:47:56,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:56,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:47:56,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686846817] [2020-10-13 23:47:56,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:47:56,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:47:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:47:56,794 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-10-13 23:47:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:57,418 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 23:47:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:47:57,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 23:47:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:57,420 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:47:57,420 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:47:57,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:47:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:47:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 23:47:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:47:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 23:47:57,428 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2020-10-13 23:47:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:57,429 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 23:47:57,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:47:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 23:47:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:47:57,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:57,430 INFO L422 BasicCegarLoop]: trace histogram [18, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:57,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:47:57,430 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1488123959, now seen corresponding path program 7 times [2020-10-13 23:47:57,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:57,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041839920] [2020-10-13 23:47:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:57,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:48:02,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:02,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:48:02,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:48:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:48:02,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:02,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:02,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:02,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:02,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:02,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:02,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:02,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:48:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:02,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:48:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:02,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:02,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:48:02,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041839920] [2020-10-13 23:48:02,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:02,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:48:02,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467433971] [2020-10-13 23:48:02,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:48:02,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:48:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:48:02,773 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 22 states. [2020-10-13 23:48:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:03,057 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-13 23:48:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:48:03,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-13 23:48:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:03,059 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:48:03,059 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:48:03,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 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 23:48:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:48:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-13 23:48:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:48:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 23:48:03,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-13 23:48:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:03,069 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 23:48:03,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:48:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 23:48:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:48:03,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:03,070 INFO L422 BasicCegarLoop]: trace histogram [19, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:03,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:48:03,070 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash -128647643, now seen corresponding path program 8 times [2020-10-13 23:48:03,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:03,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926054761] [2020-10-13 23:48:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:03,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:48:08,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:08,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:48:08,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:48:08,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:08,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:48:08,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:08,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:08,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:08,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:48:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:08,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:08,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:48:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:08,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:48:08,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926054761] [2020-10-13 23:48:08,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:08,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:48:08,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805239559] [2020-10-13 23:48:08,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:48:08,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:08,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:48:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:48:08,437 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 23 states. [2020-10-13 23:48:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:08,637 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-13 23:48:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:48:08,638 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-10-13 23:48:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:08,639 INFO L225 Difference]: With dead ends: 113 [2020-10-13 23:48:08,639 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:48:08,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:48:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:48:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-10-13 23:48:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:48:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 23:48:08,653 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-13 23:48:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:08,654 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 23:48:08,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:48:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 23:48:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:48:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:08,655 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:08,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:48:08,655 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash -934554807, now seen corresponding path program 9 times [2020-10-13 23:48:08,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:08,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785794151] [2020-10-13 23:48:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:08,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:13,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:13,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:48:13,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:48:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:13,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:13,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:13,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:13,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:13,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:13,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:13,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:13,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:13,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:48:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:13,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:13,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:13,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:13,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:13,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:13,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:13,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:13,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:13,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:13,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:13,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:13,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:48:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:13,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:13,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:13,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:13,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:13,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:13,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:13,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-13 23:48:13,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785794151] [2020-10-13 23:48:13,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:13,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:48:13,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510585716] [2020-10-13 23:48:13,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:48:13,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:13,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:48:13,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:48:13,876 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 17 states. [2020-10-13 23:48:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:14,263 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2020-10-13 23:48:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:48:14,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-13 23:48:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:14,265 INFO L225 Difference]: With dead ends: 126 [2020-10-13 23:48:14,265 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:48:14,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 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 23:48:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:48:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-10-13 23:48:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:48:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 23:48:14,277 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-10-13 23:48:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:14,278 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 23:48:14,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:48:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 23:48:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:48:14,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:14,279 INFO L422 BasicCegarLoop]: trace histogram [20, 14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:14,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:48:14,279 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash 653921190, now seen corresponding path program 10 times [2020-10-13 23:48:14,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:14,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759160709] [2020-10-13 23:48:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:14,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:14,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:19,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:19,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:48:19,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:19,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:48:19,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:19,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:48:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:48:19,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:19,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:19,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:19,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:19,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:19,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:19,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:19,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:19,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:19,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:19,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:19,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:48:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:19,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:19,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:19,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:19,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:19,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:19,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:19,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:19,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:48:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:19,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:19,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:19,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:19,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:19,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:19,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:19,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:48:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-13 23:48:19,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759160709] [2020-10-13 23:48:19,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:19,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:48:19,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788994945] [2020-10-13 23:48:19,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:48:19,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:48:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:48:19,693 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 24 states. [2020-10-13 23:48:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:19,973 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-13 23:48:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:48:19,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-13 23:48:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:19,974 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:48:19,974 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:48:19,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:48:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:48:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-13 23:48:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:48:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 23:48:19,989 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-13 23:48:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:19,990 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 23:48:19,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:48:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 23:48:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:48:19,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:19,991 INFO L422 BasicCegarLoop]: trace histogram [21, 14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:19,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:48:19,991 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -728750134, now seen corresponding path program 11 times [2020-10-13 23:48:19,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:19,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860882492] [2020-10-13 23:48:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:20,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:48:25,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:25,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:48:25,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:48:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:48:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:48:25,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:25,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:25,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:25,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:25,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:48:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:25,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:25,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:25,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:25,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:48:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:25,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:25,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:25,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:48:25,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860882492] [2020-10-13 23:48:25,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:25,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:48:25,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886016403] [2020-10-13 23:48:25,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:48:25,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:48:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:48:25,261 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 18 states. [2020-10-13 23:48:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:25,608 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2020-10-13 23:48:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:48:25,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-13 23:48:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:25,611 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:48:25,611 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 23:48:25,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:48:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 23:48:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-13 23:48:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:48:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 23:48:25,622 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-13 23:48:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:25,622 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 23:48:25,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:48:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 23:48:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:48:25,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:25,623 INFO L422 BasicCegarLoop]: trace histogram [21, 15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:25,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:48:25,623 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1556068539, now seen corresponding path program 12 times [2020-10-13 23:48:25,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:25,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845567827] [2020-10-13 23:48:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:30,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:30,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:48:30,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:30,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:48:30,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:30,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:48:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:48:30,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:31,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:48:31,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:31,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:31,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:31,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:48:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:31,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:31,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:31,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:31,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:31,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:31,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:31,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:31,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:31,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:48:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:31,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:31,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:31,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:31,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:31,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:31,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:31,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-13 23:48:31,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845567827] [2020-10-13 23:48:31,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:31,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:48:31,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688262609] [2020-10-13 23:48:31,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:48:31,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:48:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:48:31,069 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 25 states. [2020-10-13 23:48:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:31,429 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-13 23:48:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:48:31,430 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-10-13 23:48:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:31,431 INFO L225 Difference]: With dead ends: 122 [2020-10-13 23:48:31,431 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:48:31,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 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 23:48:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:48:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2020-10-13 23:48:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:48:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 23:48:31,441 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-13 23:48:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:31,441 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 23:48:31,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:48:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 23:48:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:48:31,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:31,442 INFO L422 BasicCegarLoop]: trace histogram [22, 15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:31,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:48:31,443 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1136650857, now seen corresponding path program 13 times [2020-10-13 23:48:31,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:31,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900430510] [2020-10-13 23:48:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:48:36,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:36,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:48:36,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:48:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:48:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:48:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:48:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:36,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:36,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:36,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:36,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:36,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:48:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:36,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:36,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:36,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:36,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-13 23:48:36,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900430510] [2020-10-13 23:48:36,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:36,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:48:36,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688043945] [2020-10-13 23:48:36,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:48:36,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:48:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:48:36,717 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 19 states. [2020-10-13 23:48:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:37,107 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-13 23:48:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:48:37,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-10-13 23:48:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:37,109 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:48:37,109 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:48:37,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:48:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:48:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-10-13 23:48:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:48:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 23:48:37,123 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-13 23:48:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:37,123 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 23:48:37,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:48:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 23:48:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:48:37,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:37,125 INFO L422 BasicCegarLoop]: trace histogram [22, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:37,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:48:37,126 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 436787334, now seen corresponding path program 14 times [2020-10-13 23:48:37,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:37,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517914848] [2020-10-13 23:48:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:37,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:48:42,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:48:42,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:48:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:48:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:42,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:42,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:42,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:42,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:42,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:48:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:42,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:42,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:42,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:42,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:48:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:48:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:42,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:42,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:42,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:48:42,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517914848] [2020-10-13 23:48:42,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:42,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:48:42,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335377249] [2020-10-13 23:48:42,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:48:42,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:42,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:48:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:48:42,607 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 26 states. [2020-10-13 23:48:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:42,904 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 23:48:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:48:42,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-10-13 23:48:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:42,906 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:48:42,907 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:48:42,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 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 23:48:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:48:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2020-10-13 23:48:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:48:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 23:48:42,921 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-13 23:48:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:42,921 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 23:48:42,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:48:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 23:48:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:48:42,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:42,922 INFO L422 BasicCegarLoop]: trace histogram [23, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:42,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:48:42,924 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1725152598, now seen corresponding path program 15 times [2020-10-13 23:48:42,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:42,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344302784] [2020-10-13 23:48:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:43,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:47,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:47,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:48:47,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:48:47,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:47,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:48:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:48:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:48,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:48,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:48,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:48,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:48,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:48,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:48,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:48:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:48,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:48,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:48,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:48,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:48,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:48,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:48,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:48,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:48,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:48,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:48,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 23:48:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:48,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:48,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:48,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:48,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:48,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:48,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 4 proven. 276 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:48:48,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344302784] [2020-10-13 23:48:48,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:48,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:48:48,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735382786] [2020-10-13 23:48:48,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:48:48,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:48,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:48:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:48:48,440 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 27 states. [2020-10-13 23:48:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:48,781 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-13 23:48:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:48:48,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-10-13 23:48:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:48,783 INFO L225 Difference]: With dead ends: 126 [2020-10-13 23:48:48,783 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:48:48,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 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 23:48:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:48:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2020-10-13 23:48:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:48:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 23:48:48,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-13 23:48:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:48,792 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 23:48:48,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:48:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 23:48:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:48:48,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:48,793 INFO L422 BasicCegarLoop]: trace histogram [24, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:48,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:48:48,794 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:48,794 INFO L82 PathProgramCache]: Analyzing trace with hash -25813754, now seen corresponding path program 16 times [2020-10-13 23:48:48,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:48,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341333417] [2020-10-13 23:48:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:48,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:53,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:48:53,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:48:53,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:54,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:54,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:54,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:54,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:54,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:54,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:48:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:54,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:54,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:54,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:54,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:54,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:54,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:54,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:48:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:54,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:54,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:54,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:54,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:54,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-10-13 23:48:54,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341333417] [2020-10-13 23:48:54,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:54,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:48:54,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313843809] [2020-10-13 23:48:54,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:48:54,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:48:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:48:54,101 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 20 states. [2020-10-13 23:48:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:54,557 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2020-10-13 23:48:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:48:54,558 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-13 23:48:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:54,559 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:48:54,559 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:48:54,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:48:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:48:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 73. [2020-10-13 23:48:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:48:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 23:48:54,573 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-13 23:48:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:54,574 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 23:48:54,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:48:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 23:48:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:48:54,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:54,575 INFO L422 BasicCegarLoop]: trace histogram [24, 17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:54,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:48:54,575 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1239877239, now seen corresponding path program 17 times [2020-10-13 23:48:54,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:54,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749348250] [2020-10-13 23:48:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:54,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:54,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:59,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:59,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:48:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:00,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:00,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:00,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:00,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:00,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:00,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:00,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:00,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:49:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:00,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:00,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:00,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:00,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:00,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:49:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:00,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:00,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:00,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:00,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:00,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:00,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-13 23:49:00,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749348250] [2020-10-13 23:49:00,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:00,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:49:00,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011337150] [2020-10-13 23:49:00,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:49:00,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:49:00,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:49:00,144 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 28 states. [2020-10-13 23:49:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:00,488 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-10-13 23:49:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:49:00,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-13 23:49:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:00,494 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:49:00,494 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:49:00,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 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 23:49:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:49:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2020-10-13 23:49:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:49:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 23:49:00,505 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-13 23:49:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:00,506 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 23:49:00,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:49:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 23:49:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:49:00,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:00,507 INFO L422 BasicCegarLoop]: trace histogram [25, 17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:00,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:49:00,507 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash -262820635, now seen corresponding path program 18 times [2020-10-13 23:49:00,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:00,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629438140] [2020-10-13 23:49:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:00,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:00,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:05,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:05,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:49:05,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:49:05,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:05,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:49:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:49:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:49:05,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:05,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:05,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:05,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:05,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:05,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:49:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:05,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:05,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:05,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 23:49:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:05,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:05,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:05,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:05,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:05,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:05,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-10-13 23:49:05,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629438140] [2020-10-13 23:49:05,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:05,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:49:05,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068725515] [2020-10-13 23:49:05,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:49:05,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:49:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:49:05,844 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 21 states. [2020-10-13 23:49:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:06,250 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2020-10-13 23:49:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:49:06,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-10-13 23:49:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:06,252 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:49:06,252 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:49:06,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 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 23:49:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:49:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 75. [2020-10-13 23:49:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:49:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-13 23:49:06,264 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-13 23:49:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:06,265 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-13 23:49:06,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:49:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-13 23:49:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:49:06,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:06,266 INFO L422 BasicCegarLoop]: trace histogram [25, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:06,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:49:06,266 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:06,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2844042, now seen corresponding path program 19 times [2020-10-13 23:49:06,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:06,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782434609] [2020-10-13 23:49:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:11,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:11,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:49:11,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:11,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:49:11,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:11,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:49:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:49:11,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:11,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:11,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:11,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:11,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:11,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:11,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:11,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:49:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:11,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:49:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:11,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:11,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:11,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 4 proven. 325 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:49:11,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782434609] [2020-10-13 23:49:11,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:11,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:49:11,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591432025] [2020-10-13 23:49:11,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:49:11,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:49:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:49:11,823 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 29 states. [2020-10-13 23:49:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:12,124 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2020-10-13 23:49:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:49:12,125 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-10-13 23:49:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:12,126 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:49:12,126 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:49:12,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 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 23:49:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:49:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-10-13 23:49:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:49:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 23:49:12,139 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-13 23:49:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:12,139 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 23:49:12,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:49:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 23:49:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:49:12,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:12,140 INFO L422 BasicCegarLoop]: trace histogram [26, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:12,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:49:12,140 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1643597338, now seen corresponding path program 20 times [2020-10-13 23:49:12,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:12,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749715477] [2020-10-13 23:49:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:12,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:17,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:17,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:49:17,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:17,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:49:17,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:17,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:17,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:49:17,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:17,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:49:17,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:17,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:17,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:17,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:17,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:49:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:17,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:17,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:17,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:17,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:17,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:49:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:17,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:17,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:17,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:17,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:17,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:17,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:17,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:17,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:17,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:17,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 4 proven. 351 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:49:17,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749715477] [2020-10-13 23:49:17,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:17,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:49:17,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944749172] [2020-10-13 23:49:17,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:49:17,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:49:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:49:17,755 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 30 states. [2020-10-13 23:49:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:18,154 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-10-13 23:49:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:49:18,154 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 73 [2020-10-13 23:49:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:18,155 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:49:18,155 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:49:18,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:49:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:49:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-13 23:49:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:49:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 23:49:18,171 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-13 23:49:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:18,171 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 23:49:18,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:49:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 23:49:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:49:18,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:18,179 INFO L422 BasicCegarLoop]: trace histogram [27, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:18,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:49:18,179 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1143672566, now seen corresponding path program 21 times [2020-10-13 23:49:18,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:18,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67351935] [2020-10-13 23:49:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:18,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:23,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:49:23,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:49:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:23,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:23,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:23,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:23,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:23,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:23,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:23,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:23,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:23,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:23,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:23,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:23,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:49:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:23,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:23,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:23,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:23,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:23,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:23,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:23,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:23,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:23,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:23,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:23,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:49:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:23,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:23,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:23,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:23,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:23,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:23,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:49:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-10-13 23:49:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67351935] [2020-10-13 23:49:23,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:23,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:49:23,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830401351] [2020-10-13 23:49:23,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:49:23,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:49:23,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:49:23,680 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 22 states. [2020-10-13 23:49:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:24,406 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-10-13 23:49:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:49:24,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-13 23:49:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:24,409 INFO L225 Difference]: With dead ends: 153 [2020-10-13 23:49:24,409 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:49:24,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:49:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:49:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-10-13 23:49:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:49:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 23:49:24,424 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-13 23:49:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:24,424 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 23:49:24,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:49:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 23:49:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:49:24,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:24,426 INFO L422 BasicCegarLoop]: trace histogram [27, 19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:24,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:49:24,427 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:24,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1533762043, now seen corresponding path program 22 times [2020-10-13 23:49:24,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:24,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406541024] [2020-10-13 23:49:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:24,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:29,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:29,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:49:29,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:49:29,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:29,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:49:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:49:29,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:30,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:30,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:30,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:30,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:30,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:30,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:30,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:30,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 23:49:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:30,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:30,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:30,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:30,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:30,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:30,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:30,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:30,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:49:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:30,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:30,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:30,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:30,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:30,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 4 proven. 378 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-10-13 23:49:30,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406541024] [2020-10-13 23:49:30,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:30,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:49:30,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865002015] [2020-10-13 23:49:30,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:49:30,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:49:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:49:30,309 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-13 23:49:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:30,918 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2020-10-13 23:49:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:49:30,919 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-13 23:49:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:30,920 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:49:30,920 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:49:30,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:49:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:49:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-10-13 23:49:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:49:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 23:49:30,939 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-13 23:49:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:30,941 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 23:49:30,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:49:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 23:49:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:49:30,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:30,946 INFO L422 BasicCegarLoop]: trace histogram [28, 19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:30,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:49:30,946 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2142393303, now seen corresponding path program 23 times [2020-10-13 23:49:30,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:30,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522930352] [2020-10-13 23:49:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:31,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:35,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:35,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:49:35,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:49:35,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:35,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:49:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:49:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:49:35,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:36,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:36,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:36,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:36,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:36,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:36,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:36,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:36,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:49:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:36,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:36,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:36,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:36,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:36,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:36,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:36,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:36,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:36,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:36,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:36,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:36,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 23:49:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:36,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:36,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:36,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:36,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:36,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:36,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:36,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:36,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-13 23:49:36,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522930352] [2020-10-13 23:49:36,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:36,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:49:36,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382635261] [2020-10-13 23:49:36,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:49:36,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:49:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:49:36,474 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 23 states. [2020-10-13 23:49:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:37,089 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2020-10-13 23:49:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:49:37,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-13 23:49:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:37,091 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:49:37,091 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 23:49:37,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:49:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 23:49:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 80. [2020-10-13 23:49:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:49:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 23:49:37,110 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-13 23:49:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:37,111 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 23:49:37,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:49:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 23:49:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:49:37,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:37,112 INFO L422 BasicCegarLoop]: trace histogram [28, 20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:37,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:49:37,112 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1865633478, now seen corresponding path program 24 times [2020-10-13 23:49:37,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:37,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018942904] [2020-10-13 23:49:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:37,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:42,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:49:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:42,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:42,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:42,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:42,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:42,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:42,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:42,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:42,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:42,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:42,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:42,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:42,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:49:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:42,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:42,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:49:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:42,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 4 proven. 406 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-13 23:49:42,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018942904] [2020-10-13 23:49:42,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:42,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:49:42,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044906793] [2020-10-13 23:49:42,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:49:42,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:49:42,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:49:42,800 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2020-10-13 23:49:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:43,157 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-10-13 23:49:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:49:43,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2020-10-13 23:49:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:43,159 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:49:43,159 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:49:43,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:49:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:49:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2020-10-13 23:49:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:49:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-13 23:49:43,173 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-13 23:49:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:43,173 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-13 23:49:43,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:49:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-13 23:49:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:49:43,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:43,175 INFO L422 BasicCegarLoop]: trace histogram [29, 20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:43,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:49:43,175 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1086544874, now seen corresponding path program 25 times [2020-10-13 23:49:43,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:43,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855818747] [2020-10-13 23:49:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:48,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:49:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:49:48,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:48,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:48,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:48,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:48,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:48,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:48,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:48,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 23:49:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:48,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:48,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:48,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:48,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:48,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:48,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:49:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:48,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:48,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:48,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:48,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:48,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-10-13 23:49:48,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855818747] [2020-10-13 23:49:48,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:48,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:49:48,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825610146] [2020-10-13 23:49:48,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:49:48,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:48,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:49:48,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:49:48,577 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 24 states. [2020-10-13 23:49:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:49,179 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2020-10-13 23:49:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:49:49,180 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-13 23:49:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:49,182 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:49:49,182 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:49:49,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:49:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:49:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 82. [2020-10-13 23:49:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:49:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 23:49:49,197 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-13 23:49:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:49,198 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 23:49:49,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:49:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 23:49:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:49:49,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:49,199 INFO L422 BasicCegarLoop]: trace histogram [29, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:49,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:49:49,199 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1116498139, now seen corresponding path program 26 times [2020-10-13 23:49:49,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:49,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472150309] [2020-10-13 23:49:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:49,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:54,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:49:54,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:54,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:54,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:54,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:54,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:54,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:54,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:54,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:54,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:54,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:54,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:54,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:54,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:49:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:54,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:54,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:54,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:54,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:54,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:54,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:54,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-13 23:49:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:54,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:54,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:54,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:54,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:54,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:54,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:54,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:54,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:54,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:54,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:54,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 4 proven. 435 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:49:54,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472150309] [2020-10-13 23:49:54,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:54,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:49:54,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049153019] [2020-10-13 23:49:54,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:49:54,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:49:54,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:49:54,916 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 33 states. [2020-10-13 23:49:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:55,252 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2020-10-13 23:49:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:49:55,253 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2020-10-13 23:49:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:55,254 INFO L225 Difference]: With dead ends: 148 [2020-10-13 23:49:55,254 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:49:55,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:49:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:49:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2020-10-13 23:49:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:49:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 23:49:55,267 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-13 23:49:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:55,267 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 23:49:55,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:49:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 23:49:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:49:55,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:55,268 INFO L422 BasicCegarLoop]: trace histogram [30, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:55,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 23:49:55,269 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1798630217, now seen corresponding path program 27 times [2020-10-13 23:49:55,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:55,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618504038] [2020-10-13 23:49:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:00,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:00,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:50:00,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:00,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:00,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:00,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:00,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:00,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:00,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:00,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:50:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:00,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:00,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:50:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:00,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:00,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:00,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:00,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 4 proven. 465 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:50:01,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618504038] [2020-10-13 23:50:01,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:01,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:50:01,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098617018] [2020-10-13 23:50:01,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:50:01,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:50:01,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:50:01,003 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-13 23:50:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:01,353 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-10-13 23:50:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:50:01,354 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-10-13 23:50:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:01,355 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:50:01,355 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:50:01,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:50:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:50:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2020-10-13 23:50:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:50:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 23:50:01,370 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-13 23:50:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:01,370 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 23:50:01,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:50:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 23:50:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:50:01,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:01,371 INFO L422 BasicCegarLoop]: trace histogram [31, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:01,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 23:50:01,371 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1973296037, now seen corresponding path program 28 times [2020-10-13 23:50:01,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:01,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428057795] [2020-10-13 23:50:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:01,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:06,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:50:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:50:06,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:50:06,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:06,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:06,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:06,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:06,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:06,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:50:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:06,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:06,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:06,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:06,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 23:50:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:06,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:06,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:06,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:06,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:06,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 23:50:06,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428057795] [2020-10-13 23:50:06,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:06,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:50:06,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705047952] [2020-10-13 23:50:06,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:50:06,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:50:06,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:50:06,821 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 25 states. [2020-10-13 23:50:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:07,384 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2020-10-13 23:50:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:50:07,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-13 23:50:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:07,386 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:50:07,386 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:50:07,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 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 23:50:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:50:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2020-10-13 23:50:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:50:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-13 23:50:07,402 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-13 23:50:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:07,403 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-13 23:50:07,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:50:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-13 23:50:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:50:07,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:07,404 INFO L422 BasicCegarLoop]: trace histogram [31, 22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:07,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 23:50:07,404 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash 602984138, now seen corresponding path program 29 times [2020-10-13 23:50:07,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:07,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482276658] [2020-10-13 23:50:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:12,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:12,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:50:12,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:50:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:13,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:13,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:13,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:13,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:13,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:50:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:13,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:13,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:13,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:13,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:13,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:13,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:50:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:13,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:13,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:13,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:13,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:13,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:13,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:13,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:13,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:13,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 4 proven. 496 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-13 23:50:13,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482276658] [2020-10-13 23:50:13,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:13,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:50:13,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428466472] [2020-10-13 23:50:13,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:50:13,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:13,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:50:13,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:50:13,222 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 35 states. [2020-10-13 23:50:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:13,682 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-10-13 23:50:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:50:13,682 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 82 [2020-10-13 23:50:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:13,684 INFO L225 Difference]: With dead ends: 152 [2020-10-13 23:50:13,684 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:50:13,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:50:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:50:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-13 23:50:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:50:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 23:50:13,699 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-13 23:50:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:13,699 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 23:50:13,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:50:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 23:50:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:50:13,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:13,700 INFO L422 BasicCegarLoop]: trace histogram [32, 22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:13,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 23:50:13,700 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:13,701 INFO L82 PathProgramCache]: Analyzing trace with hash 953112614, now seen corresponding path program 30 times [2020-10-13 23:50:13,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:13,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91665206] [2020-10-13 23:50:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:13,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:13,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:18,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:18,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:50:18,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:50:18,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0