/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:58:11,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:58:11,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:58:11,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:58:11,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:58:11,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:58:11,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:58:11,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:58:11,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:58:11,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:58:11,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:58:11,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:58:11,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:58:11,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:58:11,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:58:11,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:58:11,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:58:11,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:58:11,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:58:11,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:58:11,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:58:11,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:58:11,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:58:11,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:58:11,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:58:11,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:58:11,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:58:11,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:58:11,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:58:11,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:58:11,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:58:11,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:58:11,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:58:11,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:58:11,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:58:11,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:58:11,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:58:11,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:58:11,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:58:11,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:58:11,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:58:11,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:58:11,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:58:11,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:58:11,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:58:11,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:58:11,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:58:11,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:58:11,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:58:11,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:58:11,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:58:11,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:58:11,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:58:11,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:58:11,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:58:11,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:58:11,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:58:11,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:58:11,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:58:11,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:58:11,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:58:11,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:58:11,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:58:11,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:58:11,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:58:11,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:58:11,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:58:11,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:58:11,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:58:11,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:58:11,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:58:11,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:58:12,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:58:12,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:58:12,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:58:12,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:58:12,158 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:58:12,159 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-13 04:58:12,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a086525e/0a0731cc74e24046894ed2d924700560/FLAGb2c588756 [2020-10-13 04:58:12,697 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:58:12,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-13 04:58:12,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a086525e/0a0731cc74e24046894ed2d924700560/FLAGb2c588756 [2020-10-13 04:58:13,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a086525e/0a0731cc74e24046894ed2d924700560 [2020-10-13 04:58:13,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:58:13,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:58:13,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:58:13,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:58:13,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:58:13,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157ca41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13, skipping insertion in model container [2020-10-13 04:58:13,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:58:13,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:58:13,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:58:13,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:58:13,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:58:13,349 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:58:13,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13 WrapperNode [2020-10-13 04:58:13,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:58:13,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:58:13,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:58:13,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:58:13,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... [2020-10-13 04:58:13,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:58:13,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:58:13,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:58:13,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:58:13,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:58:13,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:58:13,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:58:13,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:58:13,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:58:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:58:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:58:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:58:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:58:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:58:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:58:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:58:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:58:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:58:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:58:13,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:58:13,842 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 04:58:13,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:58:13 BoogieIcfgContainer [2020-10-13 04:58:13,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:58:13,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:58:13,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:58:13,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:58:13,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:58:13" (1/3) ... [2020-10-13 04:58:13,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154e7421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:58:13, skipping insertion in model container [2020-10-13 04:58:13,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:58:13" (2/3) ... [2020-10-13 04:58:13,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154e7421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:58:13, skipping insertion in model container [2020-10-13 04:58:13,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:58:13" (3/3) ... [2020-10-13 04:58:13,857 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2020-10-13 04:58:13,870 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:58:13,877 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:58:13,892 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:58:13,918 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:58:13,918 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:58:13,919 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:58:13,919 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:58:13,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:58:13,919 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:58:13,919 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:58:13,919 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:58:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 04:58:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:58:13,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:13,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:13,949 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1902154591, now seen corresponding path program 1 times [2020-10-13 04:58:13,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:13,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956774071] [2020-10-13 04:58:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:14,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:58:14,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-13 04:58:14,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:58:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:14,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 04:58:14,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:14,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:14,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:14,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 04:58:14,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:14,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:14,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956774071] [2020-10-13 04:58:14,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:14,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:58:14,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174543471] [2020-10-13 04:58:14,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:58:14,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:14,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:58:14,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:58:14,649 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 04:58:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:14,793 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2020-10-13 04:58:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:58:14,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 04:58:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:14,805 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:58:14,806 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:58:14,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:58:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:58:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 04:58:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:58:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 04:58:14,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-10-13 04:58:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:14,856 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 04:58:14,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:58:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 04:58:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:58:14,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:14,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:14,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:58:14,858 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1137378726, now seen corresponding path program 1 times [2020-10-13 04:58:14,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:14,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549425960] [2020-10-13 04:58:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:14,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:58:15,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-13 04:58:15,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:58:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:15,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:58:15,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:15,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:15,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:58:15,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:58:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:15,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549425960] [2020-10-13 04:58:15,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:58:15,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:58:15,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582319607] [2020-10-13 04:58:15,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:58:15,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:58:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:58:15,127 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-13 04:58:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:15,221 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-13 04:58:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:58:15,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 04:58:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:15,222 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:58:15,223 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:58:15,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:58:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:58:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 04:58:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:58:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-13 04:58:15,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-10-13 04:58:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:15,233 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-13 04:58:15,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:58:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-13 04:58:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:58:15,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:15,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:15,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:58:15,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash -62722692, now seen corresponding path program 1 times [2020-10-13 04:58:15,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:15,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462255270] [2020-10-13 04:58:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:58:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 04:58:15,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:58:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:58:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:15,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:15,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:15,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:15,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:15,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:15,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:15,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462255270] [2020-10-13 04:58:15,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:15,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:58:15,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11496973] [2020-10-13 04:58:15,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:58:15,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:58:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:58:15,442 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-10-13 04:58:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:15,517 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-13 04:58:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:58:15,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 04:58:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:15,519 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:58:15,519 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:58:15,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:58:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:58:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 04:58:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:58:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-13 04:58:15,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2020-10-13 04:58:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:15,527 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-13 04:58:15,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:58:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-13 04:58:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:58:15,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:15,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:15,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:58:15,529 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1889574942, now seen corresponding path program 2 times [2020-10-13 04:58:15,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:15,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613158565] [2020-10-13 04:58:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:58:15,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 04:58:15,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:58:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:58:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:15,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:15,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:15,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:15,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:15,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:15,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613158565] [2020-10-13 04:58:15,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:15,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:58:15,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794293039] [2020-10-13 04:58:15,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:58:15,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:58:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:15,757 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-10-13 04:58:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:15,844 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-13 04:58:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:58:15,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 04:58:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:15,846 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:58:15,846 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:58:15,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:58:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:58:15,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:58:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:58:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-13 04:58:15,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 18 [2020-10-13 04:58:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:15,854 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-13 04:58:15,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:58:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-13 04:58:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:58:15,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:15,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:15,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:58:15,856 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1146892864, now seen corresponding path program 3 times [2020-10-13 04:58:15,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:15,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408776364] [2020-10-13 04:58:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:16,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:58:16,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:16,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-13 04:58:16,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:16,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:58:16,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:16,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:58:16,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:16,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:16,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:16,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:16,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:16,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:16,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:16,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:16,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408776364] [2020-10-13 04:58:16,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:16,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:58:16,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839743158] [2020-10-13 04:58:16,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:58:16,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:58:16,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:58:16,171 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2020-10-13 04:58:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:16,258 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-13 04:58:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:58:16,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 04:58:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:16,259 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:58:16,259 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:58:16,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:58:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:58:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 04:58:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:58:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-13 04:58:16,267 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 20 [2020-10-13 04:58:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:16,267 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-13 04:58:16,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:58:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-13 04:58:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:58:16,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:16,268 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:16,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:58:16,269 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash 393987042, now seen corresponding path program 4 times [2020-10-13 04:58:16,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:16,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646935565] [2020-10-13 04:58:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:16,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:58:16,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:16,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-13 04:58:16,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:58:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:58:16,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:16,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:16,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:16,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:16,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:16,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:16,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:58:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:16,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646935565] [2020-10-13 04:58:16,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:16,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:58:16,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260551050] [2020-10-13 04:58:16,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:58:16,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:58:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:58:16,613 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-10-13 04:58:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:16,724 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-13 04:58:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:58:16,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 04:58:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:16,726 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:58:16,726 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:58:16,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:58:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:58:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 04:58:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:58:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-13 04:58:16,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2020-10-13 04:58:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:16,733 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-13 04:58:16,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:58:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-13 04:58:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:58:16,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:16,735 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:16,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:58:16,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1594002172, now seen corresponding path program 5 times [2020-10-13 04:58:16,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:16,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348522489] [2020-10-13 04:58:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:16,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:58:16,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:16,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-13 04:58:16,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:58:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:58:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:17,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:17,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:17,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:17,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:17,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348522489] [2020-10-13 04:58:17,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:17,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:58:17,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353266106] [2020-10-13 04:58:17,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:58:17,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:58:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:58:17,055 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-10-13 04:58:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:17,154 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-13 04:58:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:58:17,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 04:58:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:17,155 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:58:17,156 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:58:17,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:58:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:58:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 04:58:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:58:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-13 04:58:17,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-10-13 04:58:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:17,162 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-13 04:58:17,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:58:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-13 04:58:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:58:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:17,164 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:17,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:58:17,164 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash -791190106, now seen corresponding path program 6 times [2020-10-13 04:58:17,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:17,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625657715] [2020-10-13 04:58:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:58:17,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:17,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-13 04:58:17,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:58:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:17,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:58:17,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:17,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:17,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:17,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:17,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:17,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625657715] [2020-10-13 04:58:17,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:17,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:58:17,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695470290] [2020-10-13 04:58:17,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:58:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:58:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:17,575 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-10-13 04:58:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:17,691 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-13 04:58:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:58:17,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 04:58:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:17,693 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:58:17,693 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:58:17,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:58:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:58:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:58:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:58:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-13 04:58:17,700 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2020-10-13 04:58:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:17,700 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-13 04:58:17,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:58:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-13 04:58:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:58:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:17,701 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:17,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:58:17,702 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:17,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1912059336, now seen corresponding path program 7 times [2020-10-13 04:58:17,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:17,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376698332] [2020-10-13 04:58:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:17,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:18,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:58:18,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:18,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-13 04:58:18,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:18,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:58:18,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:18,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:58:18,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:18,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:18,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:18,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:18,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:18,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:18,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376698332] [2020-10-13 04:58:18,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:18,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:58:18,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133996761] [2020-10-13 04:58:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:58:18,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:58:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:58:18,240 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 11 states. [2020-10-13 04:58:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:18,345 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-13 04:58:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:58:18,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 04:58:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:18,346 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:58:18,347 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:58:18,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:58:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:58:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 04:58:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:58:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-13 04:58:18,353 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2020-10-13 04:58:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:18,353 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-13 04:58:18,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:58:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-13 04:58:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:58:18,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:18,354 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:18,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:58:18,355 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1279559018, now seen corresponding path program 8 times [2020-10-13 04:58:18,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:18,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507479629] [2020-10-13 04:58:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:18,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:58:18,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:18,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-13 04:58:18,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:58:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:58:18,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:18,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:18,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:18,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:18,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507479629] [2020-10-13 04:58:18,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:18,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:58:18,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764135387] [2020-10-13 04:58:18,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:58:18,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:58:18,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:18,887 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 12 states. [2020-10-13 04:58:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:19,037 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-13 04:58:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:58:19,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 04:58:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:19,039 INFO L225 Difference]: With dead ends: 64 [2020-10-13 04:58:19,039 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:58:19,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:58:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:58:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:58:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:58:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 04:58:19,045 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 30 [2020-10-13 04:58:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:19,045 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 04:58:19,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:58:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 04:58:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:58:19,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:19,047 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:19,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:58:19,048 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash -962857844, now seen corresponding path program 9 times [2020-10-13 04:58:19,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:19,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383710434] [2020-10-13 04:58:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:19,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:19,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:19,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:19,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:58:19,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-13 04:58:19,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:58:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:58:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:19,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:19,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:19,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:19,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:19,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:19,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:19,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:19,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:19,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:19,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383710434] [2020-10-13 04:58:19,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:19,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:58:19,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993158989] [2020-10-13 04:58:19,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:58:19,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:58:19,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:19,753 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 13 states. [2020-10-13 04:58:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:19,930 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-13 04:58:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:58:19,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 04:58:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:19,932 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:58:19,932 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:58:19,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:58:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:58:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 04:58:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:58:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-13 04:58:19,943 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 32 [2020-10-13 04:58:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:19,944 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-13 04:58:19,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:58:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-13 04:58:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:58:19,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:19,947 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:19,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:58:19,950 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 148120366, now seen corresponding path program 10 times [2020-10-13 04:58:19,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:19,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665548684] [2020-10-13 04:58:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:19,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:20,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:20,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:20,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:58:20,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:20,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-13 04:58:20,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:58:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:58:20,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:20,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:20,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:20,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:20,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:20,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:20,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:20,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:20,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:20,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:20,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665548684] [2020-10-13 04:58:20,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:20,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:58:20,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243463676] [2020-10-13 04:58:20,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:58:20,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:58:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:58:20,569 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2020-10-13 04:58:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:20,738 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-13 04:58:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:58:20,739 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-13 04:58:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:20,740 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:58:20,740 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:58:20,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:58:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:58:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:58:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:58:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 04:58:20,750 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 34 [2020-10-13 04:58:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:20,752 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 04:58:20,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:58:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 04:58:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:58:20,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:20,755 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:20,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:58:20,755 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1648676528, now seen corresponding path program 11 times [2020-10-13 04:58:20,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:20,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344038710] [2020-10-13 04:58:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:20,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:20,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:21,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:21,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:58:21,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:21,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-13 04:58:21,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:58:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:58:21,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:21,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:21,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:21,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:21,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:21,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:21,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:21,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:21,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:21,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:21,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:21,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:21,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344038710] [2020-10-13 04:58:21,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:21,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:58:21,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656413619] [2020-10-13 04:58:21,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:58:21,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:58:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:58:21,462 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 15 states. [2020-10-13 04:58:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:21,566 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-13 04:58:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:58:21,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-13 04:58:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:21,567 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:58:21,568 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 04:58:21,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:58:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 04:58:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 04:58:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:58:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-13 04:58:21,573 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 36 [2020-10-13 04:58:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:21,573 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-13 04:58:21,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:58:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-13 04:58:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:58:21,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:21,575 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:21,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:58:21,575 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1793638670, now seen corresponding path program 12 times [2020-10-13 04:58:21,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:21,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012404429] [2020-10-13 04:58:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:21,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:22,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:22,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:58:22,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:22,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-13 04:58:22,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:58:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:58:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:22,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:22,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:22,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:22,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:22,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:22,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:22,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:22,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:22,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012404429] [2020-10-13 04:58:22,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:22,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:58:22,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487332172] [2020-10-13 04:58:22,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:58:22,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:58:22,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:58:22,381 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 16 states. [2020-10-13 04:58:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:22,523 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-13 04:58:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:58:22,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-13 04:58:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:22,525 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:58:22,525 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:58:22,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:58:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:58:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 04:58:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:58:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-13 04:58:22,529 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 38 [2020-10-13 04:58:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:22,530 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-13 04:58:22,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:58:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-13 04:58:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:58:22,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:22,531 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:22,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:58:22,531 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash 631663636, now seen corresponding path program 13 times [2020-10-13 04:58:22,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:22,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638684466] [2020-10-13 04:58:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:22,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:22,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:23,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:58:23,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-13 04:58:23,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:58:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:58:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:23,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:23,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:23,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:23,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:23,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:23,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638684466] [2020-10-13 04:58:23,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:23,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:58:23,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469734974] [2020-10-13 04:58:23,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:58:23,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:23,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:58:23,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:58:23,580 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 17 states. [2020-10-13 04:58:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:23,735 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-13 04:58:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:58:23,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 04:58:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:23,736 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:58:23,736 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:58:23,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:58:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:58:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 04:58:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:58:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-13 04:58:23,742 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 40 [2020-10-13 04:58:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:23,743 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-13 04:58:23,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:58:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-13 04:58:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:58:23,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:23,744 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:23,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:58:23,745 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash -820062026, now seen corresponding path program 14 times [2020-10-13 04:58:23,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:23,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933972032] [2020-10-13 04:58:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:24,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:24,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:58:24,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:24,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-13 04:58:24,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:24,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:58:24,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:24,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:58:24,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:24,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:24,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:24,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:24,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:24,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:24,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:24,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933972032] [2020-10-13 04:58:24,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:24,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:58:24,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666145064] [2020-10-13 04:58:24,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:58:24,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:58:24,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:58:24,790 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 18 states. [2020-10-13 04:58:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:24,981 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-13 04:58:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:58:24,982 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-13 04:58:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:24,983 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:58:24,983 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:58:24,984 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 04:58:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:58:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:58:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:58:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-13 04:58:24,995 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 42 [2020-10-13 04:58:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:24,995 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-13 04:58:24,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:58:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-13 04:58:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:58:24,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:24,996 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:24,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:58:24,996 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash -64052008, now seen corresponding path program 15 times [2020-10-13 04:58:24,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:24,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260770254] [2020-10-13 04:58:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:25,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:25,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:25,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:25,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:58:25,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:25,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-13 04:58:25,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:25,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:58:25,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:25,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:58:25,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:26,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:26,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:26,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:26,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:26,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:26,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:26,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260770254] [2020-10-13 04:58:26,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:26,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:58:26,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821768707] [2020-10-13 04:58:26,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:58:26,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:58:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:58:26,025 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 19 states. [2020-10-13 04:58:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:26,186 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-13 04:58:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:58:26,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-13 04:58:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:26,187 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:58:26,187 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:58:26,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:58:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:58:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:58:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:58:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-13 04:58:26,192 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 44 [2020-10-13 04:58:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:26,193 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-13 04:58:26,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:58:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-13 04:58:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:58:26,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:26,195 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:26,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:58:26,195 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:26,196 INFO L82 PathProgramCache]: Analyzing trace with hash 612102266, now seen corresponding path program 16 times [2020-10-13 04:58:26,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:26,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145895959] [2020-10-13 04:58:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:26,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:26,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:58:27,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-13 04:58:27,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:58:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:58:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:27,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:27,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:27,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:27,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:27,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:27,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:27,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:27,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145895959] [2020-10-13 04:58:27,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:27,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:58:27,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084880229] [2020-10-13 04:58:27,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:58:27,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:58:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:58:27,316 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 20 states. [2020-10-13 04:58:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:27,519 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-13 04:58:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:58:27,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-13 04:58:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:27,520 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:58:27,520 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:58:27,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:58:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:58:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 04:58:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:58:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-13 04:58:27,528 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 46 [2020-10-13 04:58:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:27,528 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-13 04:58:27,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:58:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-13 04:58:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:58:27,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:27,529 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:27,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:58:27,529 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1856297884, now seen corresponding path program 17 times [2020-10-13 04:58:27,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:27,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617638655] [2020-10-13 04:58:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:58:28,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-13 04:58:28,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:58:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:58:28,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:28,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:28,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:28,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:28,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:28,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:28,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:28,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617638655] [2020-10-13 04:58:28,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:28,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:58:28,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459962896] [2020-10-13 04:58:28,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:58:28,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:58:28,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:58:28,833 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 21 states. [2020-10-13 04:58:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:29,059 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-13 04:58:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:58:29,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-13 04:58:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:29,060 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:58:29,061 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 04:58:29,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:58:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 04:58:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 04:58:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:58:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-13 04:58:29,071 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 48 [2020-10-13 04:58:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:29,072 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-13 04:58:29,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:58:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-13 04:58:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:58:29,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:29,075 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:29,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:58:29,076 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -767588802, now seen corresponding path program 18 times [2020-10-13 04:58:29,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:29,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573908676] [2020-10-13 04:58:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:29,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:30,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:58:30,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:30,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-13 04:58:30,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:30,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:58:30,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:30,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:58:30,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:30,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:30,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:30,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:30,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:30,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:30,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:30,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573908676] [2020-10-13 04:58:30,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:30,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:58:30,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732049354] [2020-10-13 04:58:30,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:58:30,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:58:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:58:30,696 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 22 states. [2020-10-13 04:58:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:30,921 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-10-13 04:58:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:58:30,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 04:58:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:30,923 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:58:30,923 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:58:30,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:58:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:58:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 04:58:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:58:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-13 04:58:30,929 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2020-10-13 04:58:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:30,929 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-13 04:58:30,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:58:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-13 04:58:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:58:30,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:30,930 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:30,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:58:30,931 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1176891296, now seen corresponding path program 19 times [2020-10-13 04:58:30,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:30,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917305978] [2020-10-13 04:58:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:32,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:32,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:58:32,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:32,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-13 04:58:32,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:32,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:58:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:58:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:32,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:32,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:32,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:32,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:32,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917305978] [2020-10-13 04:58:32,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:32,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:58:32,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091084640] [2020-10-13 04:58:32,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:58:32,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:58:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:58:32,341 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 23 states. [2020-10-13 04:58:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:32,500 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-13 04:58:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:58:32,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 04:58:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:32,501 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:58:32,501 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:58:32,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:58:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:58:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:58:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:58:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 04:58:32,507 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 52 [2020-10-13 04:58:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:32,507 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 04:58:32,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:58:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 04:58:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:58:32,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:32,508 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:32,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:58:32,508 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:32,508 INFO L82 PathProgramCache]: Analyzing trace with hash 620403202, now seen corresponding path program 20 times [2020-10-13 04:58:32,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:32,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829127858] [2020-10-13 04:58:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:33,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:33,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:58:33,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:33,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-13 04:58:33,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:33,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:58:33,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:33,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:58:33,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:34,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:34,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:34,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:34,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:34,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:34,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:34,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:34,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:34,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829127858] [2020-10-13 04:58:34,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:34,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:58:34,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140501097] [2020-10-13 04:58:34,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:58:34,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:58:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:58:34,022 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 24 states. [2020-10-13 04:58:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:34,244 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-13 04:58:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:58:34,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-13 04:58:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:34,247 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:58:34,247 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:58:34,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 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 04:58:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:58:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:58:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:58:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-13 04:58:34,252 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 54 [2020-10-13 04:58:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:34,252 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-13 04:58:34,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:58:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-13 04:58:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:58:34,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:34,253 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:34,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:58:34,254 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1243562788, now seen corresponding path program 21 times [2020-10-13 04:58:34,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:34,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421072629] [2020-10-13 04:58:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:34,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:34,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:35,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:35,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:58:35,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:35,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1380 [2020-10-13 04:58:35,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:58:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:35,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:58:35,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:36,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:36,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421072629] [2020-10-13 04:58:36,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:36,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:58:36,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700350298] [2020-10-13 04:58:36,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:58:36,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:58:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:36,016 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 25 states. [2020-10-13 04:58:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:36,230 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-13 04:58:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:58:36,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 04:58:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:36,232 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:58:36,233 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:58:36,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:58:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 04:58:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:58:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-10-13 04:58:36,239 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 56 [2020-10-13 04:58:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:36,240 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-10-13 04:58:36,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:58:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-10-13 04:58:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:58:36,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:36,241 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:36,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:58:36,242 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1195496506, now seen corresponding path program 22 times [2020-10-13 04:58:36,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:36,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597960092] [2020-10-13 04:58:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:37,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:37,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:58:37,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-13 04:58:37,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:58:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:58:37,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:37,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:37,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:37,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:37,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:37,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:37,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597960092] [2020-10-13 04:58:37,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:37,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:58:37,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773902191] [2020-10-13 04:58:37,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:58:37,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:58:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:58:37,713 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 26 states. [2020-10-13 04:58:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:37,923 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-13 04:58:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:58:37,924 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 04:58:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:37,925 INFO L225 Difference]: With dead ends: 92 [2020-10-13 04:58:37,926 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:58:37,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:58:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:58:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 04:58:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:58:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-13 04:58:37,931 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 58 [2020-10-13 04:58:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:37,931 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-13 04:58:37,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:58:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-13 04:58:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:58:37,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:37,932 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:37,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:58:37,933 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash -79334424, now seen corresponding path program 23 times [2020-10-13 04:58:37,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:37,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689858659] [2020-10-13 04:58:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:37,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:38,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:38,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:38,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:58:38,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:39,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:39,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:39,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:39,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:58:39,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:39,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:39,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689858659] [2020-10-13 04:58:39,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:39,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:58:39,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164960523] [2020-10-13 04:58:39,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:58:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:58:39,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:58:39,439 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 27 states. [2020-10-13 04:58:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:39,743 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-13 04:58:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:58:39,744 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 04:58:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:39,745 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:58:39,745 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:58:39,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:58:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:58:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 04:58:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:58:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-10-13 04:58:39,750 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 60 [2020-10-13 04:58:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:39,751 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-10-13 04:58:39,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:58:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-10-13 04:58:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:58:39,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:39,752 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:39,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:58:39,752 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:39,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1189397622, now seen corresponding path program 24 times [2020-10-13 04:58:39,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:39,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214746577] [2020-10-13 04:58:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:40,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:40,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:40,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:58:40,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:40,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-13 04:58:40,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:40,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:58:40,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:40,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:58:40,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:41,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:41,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:41,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:41,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:41,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:41,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:41,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214746577] [2020-10-13 04:58:41,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:41,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:58:41,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073825651] [2020-10-13 04:58:41,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:58:41,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:58:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:58:41,331 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 28 states. [2020-10-13 04:58:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:41,521 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-13 04:58:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:58:41,522 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 04:58:41,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:41,523 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:58:41,523 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:58:41,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:58:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:58:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:58:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:58:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-13 04:58:41,528 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 62 [2020-10-13 04:58:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:41,528 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-13 04:58:41,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:58:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-13 04:58:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:58:41,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:41,529 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:41,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:58:41,530 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1486725804, now seen corresponding path program 25 times [2020-10-13 04:58:41,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:41,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700681189] [2020-10-13 04:58:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:41,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:42,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:42,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1275 [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:58:42,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:43,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:43,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:43,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:43,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:43,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:43,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:43,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:43,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:43,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:43,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700681189] [2020-10-13 04:58:43,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:43,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:58:43,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122189636] [2020-10-13 04:58:43,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:58:43,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:58:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:58:43,337 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 29 states. [2020-10-13 04:58:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:43,575 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-13 04:58:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:58:43,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-13 04:58:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:43,577 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:58:43,577 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:58:43,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:58:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:58:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 04:58:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:58:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-13 04:58:43,581 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 64 [2020-10-13 04:58:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:43,582 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-13 04:58:43,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:58:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-13 04:58:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:58:43,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:43,583 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:43,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:58:43,583 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash 555927886, now seen corresponding path program 26 times [2020-10-13 04:58:43,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:43,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430381163] [2020-10-13 04:58:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:43,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:43,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:58:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:58:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:45,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:45,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430381163] [2020-10-13 04:58:45,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:45,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:58:45,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976656133] [2020-10-13 04:58:45,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:58:45,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:58:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:58:45,282 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 30 states. [2020-10-13 04:58:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:45,453 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-13 04:58:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:58:45,453 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 04:58:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:45,454 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:58:45,454 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:58:45,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 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 04:58:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:58:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:58:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:58:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-13 04:58:45,460 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 66 [2020-10-13 04:58:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:45,461 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-13 04:58:45,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:58:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-13 04:58:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:58:45,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:45,462 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:45,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:58:45,462 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -587673744, now seen corresponding path program 27 times [2020-10-13 04:58:45,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:45,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269720204] [2020-10-13 04:58:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:45,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:46,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:46,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:58:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:47,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:47,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:47,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:47,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:47,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:47,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:47,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:47,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269720204] [2020-10-13 04:58:47,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:47,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:58:47,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616397975] [2020-10-13 04:58:47,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:58:47,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:58:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:58:47,273 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 31 states. [2020-10-13 04:58:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:47,540 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-13 04:58:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:58:47,541 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-13 04:58:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:47,541 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:58:47,542 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:58:47,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:58:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:58:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 04:58:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:58:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2020-10-13 04:58:47,548 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 68 [2020-10-13 04:58:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:47,548 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2020-10-13 04:58:47,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:58:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2020-10-13 04:58:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:58:47,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:47,549 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:47,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:58:47,549 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -77212398, now seen corresponding path program 28 times [2020-10-13 04:58:47,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:47,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896855228] [2020-10-13 04:58:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:47,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:48,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:49,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1482 [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:58:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:49,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:49,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:49,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:49,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896855228] [2020-10-13 04:58:49,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:49,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:58:49,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408526084] [2020-10-13 04:58:49,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:58:49,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:49,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:58:49,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:58:49,637 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 32 states. [2020-10-13 04:58:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:49,863 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-13 04:58:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:58:49,863 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-13 04:58:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:49,864 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:58:49,865 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:58:49,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:58:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:58:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 04:58:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:58:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-13 04:58:49,871 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 70 [2020-10-13 04:58:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:49,871 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-13 04:58:49,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:58:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-13 04:58:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:58:49,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:49,872 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:49,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:58:49,872 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash 849869364, now seen corresponding path program 29 times [2020-10-13 04:58:49,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:49,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948256300] [2020-10-13 04:58:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:49,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:51,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:51,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:58:51,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1558 [2020-10-13 04:58:51,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:58:51,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:51,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:58:51,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:52,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:52,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:52,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:52,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:52,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:52,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:52,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:52,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:52,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:58:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:52,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948256300] [2020-10-13 04:58:52,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:52,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:58:52,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388482870] [2020-10-13 04:58:52,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:58:52,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:58:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:58:52,159 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 33 states. [2020-10-13 04:58:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:52,420 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2020-10-13 04:58:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:58:52,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-13 04:58:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:52,422 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:58:52,423 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 04:58:52,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 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 04:58:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 04:58:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 04:58:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:58:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-10-13 04:58:52,436 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 72 [2020-10-13 04:58:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:52,436 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-10-13 04:58:52,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:58:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-10-13 04:58:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:58:52,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:52,437 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:52,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:58:52,438 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1577754922, now seen corresponding path program 30 times [2020-10-13 04:58:52,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:52,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386869630] [2020-10-13 04:58:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:52,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:52,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:53,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:54,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:54,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:58:54,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:54,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1656 [2020-10-13 04:58:54,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:54,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:58:54,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:54,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:58:54,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:54,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:54,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:54,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:54,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:54,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:54,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:54,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:54,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:54,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386869630] [2020-10-13 04:58:54,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:54,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:58:54,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856534091] [2020-10-13 04:58:54,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:58:54,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:58:54,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:58:54,788 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 34 states. [2020-10-13 04:58:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:54,953 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-13 04:58:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:58:54,953 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-13 04:58:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:54,955 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:58:54,955 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:58:54,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 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 04:58:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:58:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:58:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:58:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-13 04:58:54,961 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 74 [2020-10-13 04:58:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:54,961 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-13 04:58:54,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:58:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-13 04:58:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:58:54,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:54,962 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:54,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:58:54,962 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1937515256, now seen corresponding path program 31 times [2020-10-13 04:58:54,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:54,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448616667] [2020-10-13 04:58:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:55,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:56,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:56,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:58:56,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1841 [2020-10-13 04:58:56,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:58:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:58:56,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:57,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:57,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:57,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:57,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:57,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:57,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:57,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:57,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:57,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:57,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:58:57,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448616667] [2020-10-13 04:58:57,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:57,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:58:57,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256135213] [2020-10-13 04:58:57,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:58:57,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:58:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:58:57,517 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 35 states. [2020-10-13 04:58:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:57,708 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-10-13 04:58:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:58:57,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-13 04:58:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:57,711 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:58:57,711 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:58:57,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:58:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:58:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-13 04:58:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:58:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-13 04:58:57,717 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 76 [2020-10-13 04:58:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:57,717 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-13 04:58:57,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:58:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-13 04:58:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:58:57,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:57,719 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:57,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:58:57,719 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash -27105638, now seen corresponding path program 32 times [2020-10-13 04:58:57,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:57,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33947122] [2020-10-13 04:58:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:57,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:00,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:00,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:00,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:00,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:00,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:59:00,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:00,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:00,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33947122] [2020-10-13 04:59:00,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:00,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:59:00,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866133482] [2020-10-13 04:59:00,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:59:00,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:59:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:59:00,297 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 36 states. [2020-10-13 04:59:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:00,508 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2020-10-13 04:59:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:59:00,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-13 04:59:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:00,510 INFO L225 Difference]: With dead ends: 112 [2020-10-13 04:59:00,511 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:59:00,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:59:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:59:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:59:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:59:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-13 04:59:00,519 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 78 [2020-10-13 04:59:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:00,519 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-13 04:59:00,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:59:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-13 04:59:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:59:00,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:00,520 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:00,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:59:00,521 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1757825468, now seen corresponding path program 33 times [2020-10-13 04:59:00,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:00,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351441394] [2020-10-13 04:59:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:01,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:59:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:02,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:59:02,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:03,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:03,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:03,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351441394] [2020-10-13 04:59:03,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:03,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:59:03,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386104505] [2020-10-13 04:59:03,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:59:03,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:59:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:59:03,568 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 37 states. [2020-10-13 04:59:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:03,855 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2020-10-13 04:59:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:59:03,855 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-13 04:59:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:03,857 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:59:03,857 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:59:03,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:59:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:59:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 04:59:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:59:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2020-10-13 04:59:03,863 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 80 [2020-10-13 04:59:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:03,864 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2020-10-13 04:59:03,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:59:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2020-10-13 04:59:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:59:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:03,865 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:03,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:59:03,865 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -910300066, now seen corresponding path program 34 times [2020-10-13 04:59:03,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:03,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392586390] [2020-10-13 04:59:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:03,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:03,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:04,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:05,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:05,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:59:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:05,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1779 [2020-10-13 04:59:05,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:05,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:59:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:59:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:06,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:06,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392586390] [2020-10-13 04:59:06,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:06,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:59:06,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291670887] [2020-10-13 04:59:06,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:59:06,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:59:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:59:06,506 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 38 states. [2020-10-13 04:59:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:06,821 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-13 04:59:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:59:06,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-13 04:59:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:06,823 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:59:06,823 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:59:06,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:59:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:59:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-13 04:59:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:59:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-13 04:59:06,836 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 82 [2020-10-13 04:59:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:06,836 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-13 04:59:06,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:59:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-13 04:59:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:59:06,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:06,842 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:06,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:59:06,842 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash -883462528, now seen corresponding path program 35 times [2020-10-13 04:59:06,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:06,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552934209] [2020-10-13 04:59:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:06,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:06,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1845 [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:59:08,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:08,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:59:08,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:09,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:09,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:09,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:09,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:09,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:09,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:09,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:09,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:09,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:09,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552934209] [2020-10-13 04:59:09,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:09,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:59:09,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134581515] [2020-10-13 04:59:09,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:59:09,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:59:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:59:09,572 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 39 states. [2020-10-13 04:59:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:09,802 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-10-13 04:59:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:59:09,803 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-13 04:59:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:09,804 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:59:09,804 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:59:09,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:59:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:59:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 04:59:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:59:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2020-10-13 04:59:09,810 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 84 [2020-10-13 04:59:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:09,810 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2020-10-13 04:59:09,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:59:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2020-10-13 04:59:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:59:09,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:09,812 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:09,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:59:09,812 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:09,812 INFO L82 PathProgramCache]: Analyzing trace with hash -862392286, now seen corresponding path program 36 times [2020-10-13 04:59:09,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:09,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427781625] [2020-10-13 04:59:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:09,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2181 [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:59:12,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:12,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:12,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:12,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:12,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:12,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:12,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:12,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427781625] [2020-10-13 04:59:12,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:12,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:59:12,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088430043] [2020-10-13 04:59:12,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:59:12,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:59:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:59:12,963 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 40 states. [2020-10-13 04:59:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:13,301 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2020-10-13 04:59:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:59:13,302 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-13 04:59:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:13,303 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:59:13,303 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:59:13,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:59:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:59:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 04:59:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:59:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-13 04:59:13,308 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 86 [2020-10-13 04:59:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:13,308 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-13 04:59:13,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:59:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-13 04:59:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 04:59:13,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:13,309 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:13,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:59:13,310 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2088726204, now seen corresponding path program 37 times [2020-10-13 04:59:13,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:13,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26356429] [2020-10-13 04:59:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:13,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:13,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:15,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:15,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:59:15,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:15,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2241 [2020-10-13 04:59:15,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:15,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:59:15,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:15,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:59:15,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:16,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:16,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:16,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:16,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26356429] [2020-10-13 04:59:16,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:16,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:59:16,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219010229] [2020-10-13 04:59:16,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:59:16,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:59:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:59:16,563 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 41 states. [2020-10-13 04:59:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:16,864 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2020-10-13 04:59:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:59:16,865 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-13 04:59:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:16,866 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:59:16,866 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:59:16,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:59:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:59:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 04:59:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:59:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-13 04:59:16,873 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 88 [2020-10-13 04:59:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:16,873 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-13 04:59:16,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:59:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-13 04:59:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:59:16,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:16,874 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:16,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:59:16,875 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash 520384998, now seen corresponding path program 38 times [2020-10-13 04:59:16,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:16,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884475241] [2020-10-13 04:59:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2508 [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:59:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:59:19,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:20,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:20,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:20,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:20,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884475241] [2020-10-13 04:59:20,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:20,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:59:20,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410865307] [2020-10-13 04:59:20,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:59:20,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:59:20,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:59:20,424 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 42 states. [2020-10-13 04:59:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:20,670 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-13 04:59:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:59:20,671 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-13 04:59:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:20,672 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:59:20,672 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:59:20,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:59:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:59:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:59:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:59:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2020-10-13 04:59:20,678 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 90 [2020-10-13 04:59:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:20,679 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2020-10-13 04:59:20,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:59:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2020-10-13 04:59:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:59:20,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:20,682 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:20,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:59:20,682 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash -384650744, now seen corresponding path program 39 times [2020-10-13 04:59:20,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:20,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615824038] [2020-10-13 04:59:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:20,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:20,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2572 [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:59:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:23,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:59:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:24,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:24,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:24,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615824038] [2020-10-13 04:59:24,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:24,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:59:24,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867050697] [2020-10-13 04:59:24,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:59:24,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:59:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:59:24,300 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 43 states. [2020-10-13 04:59:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:24,534 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-10-13 04:59:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:59:24,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-13 04:59:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:24,536 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:59:24,536 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:59:24,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:59:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:59:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:59:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:59:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-10-13 04:59:24,543 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 92 [2020-10-13 04:59:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:24,543 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-10-13 04:59:24,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:59:24,544 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-10-13 04:59:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:59:24,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:24,545 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:24,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:59:24,545 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1754362282, now seen corresponding path program 40 times [2020-10-13 04:59:24,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:24,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465908080] [2020-10-13 04:59:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:24,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:24,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2941 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:59:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:28,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:28,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:28,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:28,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:28,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:28,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:28,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:28,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:28,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:28,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465908080] [2020-10-13 04:59:28,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:28,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:59:28,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245038105] [2020-10-13 04:59:28,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:59:28,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:59:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:59:28,626 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 44 states. [2020-10-13 04:59:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:28,848 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2020-10-13 04:59:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:59:28,848 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-13 04:59:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:28,849 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:59:28,849 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:59:28,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:59:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:59:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 04:59:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:59:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-13 04:59:28,857 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 94 [2020-10-13 04:59:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:28,857 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-13 04:59:28,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:59:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-13 04:59:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:59:28,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:28,859 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:28,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:59:28,859 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:28,860 INFO L82 PathProgramCache]: Analyzing trace with hash 56545484, now seen corresponding path program 41 times [2020-10-13 04:59:28,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:28,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685645966] [2020-10-13 04:59:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:28,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:28,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:29,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:31,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:31,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:59:31,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:31,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2892 [2020-10-13 04:59:31,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:31,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:59:31,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:31,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:59:31,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:32,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:32,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:32,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:32,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:32,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:32,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:32,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685645966] [2020-10-13 04:59:32,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:32,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:59:32,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991092061] [2020-10-13 04:59:32,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:59:32,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:59:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:59:32,952 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 45 states. [2020-10-13 04:59:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:33,214 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-10-13 04:59:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:59:33,214 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-13 04:59:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:33,216 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:59:33,216 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 04:59:33,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:59:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 04:59:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 04:59:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:59:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-13 04:59:33,223 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 96 [2020-10-13 04:59:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:33,223 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-13 04:59:33,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:59:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-13 04:59:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:59:33,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:33,224 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:33,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:59:33,224 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash 542175086, now seen corresponding path program 42 times [2020-10-13 04:59:33,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:33,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425227750] [2020-10-13 04:59:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:33,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:36,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:36,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:59:36,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3342 [2020-10-13 04:59:36,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:59:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:59:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:37,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:37,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:37,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:37,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:37,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:37,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:37,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425227750] [2020-10-13 04:59:37,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:37,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:59:37,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025683939] [2020-10-13 04:59:37,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:59:37,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:59:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:59:37,805 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 46 states. [2020-10-13 04:59:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:38,123 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-13 04:59:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:59:38,124 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-13 04:59:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:38,125 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:59:38,125 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:59:38,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:59:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:59:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 04:59:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:59:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-10-13 04:59:38,131 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 98 [2020-10-13 04:59:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:38,132 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-10-13 04:59:38,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:59:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-10-13 04:59:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:59:38,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:38,133 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:38,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:59:38,133 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:38,134 INFO L82 PathProgramCache]: Analyzing trace with hash -919212656, now seen corresponding path program 43 times [2020-10-13 04:59:38,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:38,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069777824] [2020-10-13 04:59:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:38,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:38,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:41,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3384 [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:59:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:42,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:42,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:42,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:42,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069777824] [2020-10-13 04:59:42,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:42,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:59:42,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114486803] [2020-10-13 04:59:42,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:59:42,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:59:42,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:59:42,840 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 47 states. [2020-10-13 04:59:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:43,242 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2020-10-13 04:59:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:59:43,243 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-13 04:59:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:43,244 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:59:43,245 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:59:43,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:59:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:59:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 04:59:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:59:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-10-13 04:59:43,252 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 100 [2020-10-13 04:59:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:43,252 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-10-13 04:59:43,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:59:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-10-13 04:59:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:59:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:43,253 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:43,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:59:43,254 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash -858526926, now seen corresponding path program 44 times [2020-10-13 04:59:43,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:43,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078604645] [2020-10-13 04:59:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:43,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:46,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3705 [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:46,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:59:46,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:48,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:48,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:48,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:48,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:48,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:59:48,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:48,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:48,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078604645] [2020-10-13 04:59:48,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:48,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:59:48,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651634615] [2020-10-13 04:59:48,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:59:48,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:59:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:59:48,315 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 48 states. [2020-10-13 04:59:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:48,588 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-13 04:59:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:59:48,588 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-13 04:59:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:48,590 INFO L225 Difference]: With dead ends: 136 [2020-10-13 04:59:48,590 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 04:59:48,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:59:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 04:59:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 04:59:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:59:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-10-13 04:59:48,596 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 102 [2020-10-13 04:59:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:48,596 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-10-13 04:59:48,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:59:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-10-13 04:59:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:59:48,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:48,597 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:48,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:59:48,598 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:48,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1625884756, now seen corresponding path program 45 times [2020-10-13 04:59:48,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:48,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152346785] [2020-10-13 04:59:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:48,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:48,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:52,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:52,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:59:52,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4083 [2020-10-13 04:59:52,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:59:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 04:59:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:54,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:59:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:59:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:59:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:59:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:59:54,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152346785] [2020-10-13 04:59:54,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:59:54,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 04:59:54,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947577769] [2020-10-13 04:59:54,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 04:59:54,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:59:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 04:59:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:59:54,102 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 49 states. [2020-10-13 04:59:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:59:54,516 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-10-13 04:59:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:59:54,516 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-13 04:59:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:59:54,518 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:59:54,518 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:59:54,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:59:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:59:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-13 04:59:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:59:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2020-10-13 04:59:54,523 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 104 [2020-10-13 04:59:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:59:54,524 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2020-10-13 04:59:54,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 04:59:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2020-10-13 04:59:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:59:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:59:54,525 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:59:54,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:59:54,525 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:59:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:59:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1143694582, now seen corresponding path program 46 times [2020-10-13 04:59:54,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:59:54,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503483377] [2020-10-13 04:59:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:59:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:59:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:54,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:54,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:59:58,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4256 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 04:59:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:00,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:00,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:00,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:00,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:00,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:00,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:00,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:00,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:00,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:00,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:00,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:00,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503483377] [2020-10-13 05:00:00,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:00,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 05:00:00,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013289321] [2020-10-13 05:00:00,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 05:00:00,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 05:00:00,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:00:00,267 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand 50 states. [2020-10-13 05:00:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:00,601 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-13 05:00:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:00:00,602 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-13 05:00:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:00,604 INFO L225 Difference]: With dead ends: 140 [2020-10-13 05:00:00,604 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 05:00:00,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:00:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 05:00:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 05:00:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 05:00:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-13 05:00:00,610 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 106 [2020-10-13 05:00:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:00,610 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-13 05:00:00,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 05:00:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-13 05:00:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 05:00:00,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:00,611 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:00,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 05:00:00,611 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:00,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1615405336, now seen corresponding path program 47 times [2020-10-13 05:00:00,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:00,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908805459] [2020-10-13 05:00:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:00,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:05,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:05,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 05:00:05,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:05,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4393 [2020-10-13 05:00:05,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 05:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 05:00:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:06,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:06,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:06,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:06,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:06,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:06,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:06,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:06,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:06,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908805459] [2020-10-13 05:00:06,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:06,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 05:00:06,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099131026] [2020-10-13 05:00:06,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 05:00:06,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:06,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 05:00:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:00:06,492 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 51 states. [2020-10-13 05:00:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:06,765 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2020-10-13 05:00:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 05:00:06,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-13 05:00:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:06,767 INFO L225 Difference]: With dead ends: 142 [2020-10-13 05:00:06,767 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 05:00:06,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:00:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 05:00:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 05:00:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 05:00:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2020-10-13 05:00:06,774 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 108 [2020-10-13 05:00:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:06,774 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2020-10-13 05:00:06,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 05:00:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2020-10-13 05:00:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:00:06,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:06,775 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:06,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 05:00:06,776 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash -337093446, now seen corresponding path program 48 times [2020-10-13 05:00:06,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:06,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842849559] [2020-10-13 05:00:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:06,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:06,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:11,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4738 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 05:00:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:13,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:13,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:13,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842849559] [2020-10-13 05:00:13,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:13,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 05:00:13,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109038693] [2020-10-13 05:00:13,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 05:00:13,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 05:00:13,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:00:13,095 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand 52 states. [2020-10-13 05:00:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:13,545 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2020-10-13 05:00:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:00:13,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-13 05:00:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:13,547 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:00:13,547 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:00:13,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:00:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:00:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 05:00:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 05:00:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2020-10-13 05:00:13,552 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 110 [2020-10-13 05:00:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:13,553 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2020-10-13 05:00:13,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 05:00:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2020-10-13 05:00:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 05:00:13,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:13,554 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:13,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 05:00:13,555 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 212285404, now seen corresponding path program 49 times [2020-10-13 05:00:13,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:13,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337742569] [2020-10-13 05:00:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:13,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:13,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:18,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:18,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 05:00:18,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:18,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:00:18,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:00:18,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:18,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 05:00:18,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:20,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:20,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:20,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:20,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337742569] [2020-10-13 05:00:20,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:20,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:00:20,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535120716] [2020-10-13 05:00:20,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:00:20,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:00:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:00:20,244 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand 53 states. [2020-10-13 05:00:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:20,513 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2020-10-13 05:00:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 05:00:20,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-13 05:00:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:20,516 INFO L225 Difference]: With dead ends: 146 [2020-10-13 05:00:20,516 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 05:00:20,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:00:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 05:00:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-13 05:00:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 05:00:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-10-13 05:00:20,527 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 112 [2020-10-13 05:00:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:20,528 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-10-13 05:00:20,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 05:00:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-10-13 05:00:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 05:00:20,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:20,530 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:20,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 05:00:20,531 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash -115617154, now seen corresponding path program 50 times [2020-10-13 05:00:20,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:20,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818165332] [2020-10-13 05:00:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:25,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 05:00:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:27,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:27,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:27,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:27,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:27,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:27,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:27,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:27,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:27,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:27,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818165332] [2020-10-13 05:00:27,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:27,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 05:00:27,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356732725] [2020-10-13 05:00:27,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 05:00:27,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 05:00:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:00:27,318 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 54 states. [2020-10-13 05:00:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:27,786 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2020-10-13 05:00:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:00:27,787 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-13 05:00:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:27,788 INFO L225 Difference]: With dead ends: 148 [2020-10-13 05:00:27,789 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 05:00:27,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:00:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 05:00:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 05:00:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 05:00:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-10-13 05:00:27,794 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 114 [2020-10-13 05:00:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:27,795 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-10-13 05:00:27,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 05:00:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-10-13 05:00:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:00:27,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:27,796 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:27,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 05:00:27,796 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:27,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1697362784, now seen corresponding path program 51 times [2020-10-13 05:00:27,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:27,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512590804] [2020-10-13 05:00:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:27,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:27,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:32,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:32,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:00:32,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:32,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 05:00:32,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 05:00:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 05:00:32,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:34,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:34,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:34,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:34,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:34,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:34,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:34,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:34,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512590804] [2020-10-13 05:00:34,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:34,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 05:00:34,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944334324] [2020-10-13 05:00:34,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 05:00:34,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 05:00:34,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:00:34,616 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 55 states. [2020-10-13 05:00:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:34,981 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2020-10-13 05:00:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 05:00:34,982 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 116 [2020-10-13 05:00:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:34,983 INFO L225 Difference]: With dead ends: 150 [2020-10-13 05:00:34,983 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 05:00:34,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:00:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 05:00:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 05:00:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 05:00:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 135 transitions. [2020-10-13 05:00:34,989 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 135 transitions. Word has length 116 [2020-10-13 05:00:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:34,989 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 135 transitions. [2020-10-13 05:00:34,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 05:00:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 135 transitions. [2020-10-13 05:00:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 05:00:34,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:34,992 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:34,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 05:00:34,992 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:34,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1336490430, now seen corresponding path program 52 times [2020-10-13 05:00:34,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:34,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182397388] [2020-10-13 05:00:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:40,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:40,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 05:00:40,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:40,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:00:40,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:40,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 05:00:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 05:00:40,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:41,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:41,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:41,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:41,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182397388] [2020-10-13 05:00:41,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:41,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 05:00:41,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106138520] [2020-10-13 05:00:41,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 05:00:41,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 05:00:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:00:41,902 INFO L87 Difference]: Start difference. First operand 130 states and 135 transitions. Second operand 56 states. [2020-10-13 05:00:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:42,382 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-10-13 05:00:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 05:00:42,382 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 118 [2020-10-13 05:00:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:42,384 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:00:42,385 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:00:42,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:00:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:00:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-13 05:00:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:00:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-10-13 05:00:42,390 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 118 [2020-10-13 05:00:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:42,391 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-10-13 05:00:42,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 05:00:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-10-13 05:00:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 05:00:42,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:42,392 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:42,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 05:00:42,392 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1864458084, now seen corresponding path program 53 times [2020-10-13 05:00:42,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:42,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473489484] [2020-10-13 05:00:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:42,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:42,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:47,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:47,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 05:00:47,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:49,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:49,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:49,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:49,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:49,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:49,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473489484] [2020-10-13 05:00:49,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:49,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 05:00:49,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794663660] [2020-10-13 05:00:49,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 05:00:49,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 05:00:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:00:49,343 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 57 states. [2020-10-13 05:00:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:49,839 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2020-10-13 05:00:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 05:00:49,840 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 120 [2020-10-13 05:00:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:49,842 INFO L225 Difference]: With dead ends: 154 [2020-10-13 05:00:49,842 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 05:00:49,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 05:00:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 05:00:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-13 05:00:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 05:00:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 139 transitions. [2020-10-13 05:00:49,847 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 139 transitions. Word has length 120 [2020-10-13 05:00:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:49,848 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 139 transitions. [2020-10-13 05:00:49,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 05:00:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 139 transitions. [2020-10-13 05:00:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 05:00:49,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:49,849 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:49,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 05:00:49,849 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1515571194, now seen corresponding path program 54 times [2020-10-13 05:00:49,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:49,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931427521] [2020-10-13 05:00:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:49,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:50,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:54,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:54,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 05:00:54,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:00:54,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 05:00:54,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:54,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 05:00:54,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:00:54,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 05:00:54,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:56,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:00:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:56,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:56,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:00:56,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:00:56,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:00:56,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:00:56,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:00:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:00:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:00:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:00:56,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:00:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:00:56,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931427521] [2020-10-13 05:00:56,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:00:56,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 05:00:56,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520501847] [2020-10-13 05:00:56,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 05:00:56,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:00:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 05:00:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:00:56,896 INFO L87 Difference]: Start difference. First operand 134 states and 139 transitions. Second operand 58 states. [2020-10-13 05:00:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:00:57,322 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2020-10-13 05:00:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:00:57,322 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 122 [2020-10-13 05:00:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:00:57,324 INFO L225 Difference]: With dead ends: 156 [2020-10-13 05:00:57,324 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 05:00:57,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:00:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 05:00:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 05:00:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 05:00:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2020-10-13 05:00:57,329 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 122 [2020-10-13 05:00:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:00:57,329 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2020-10-13 05:00:57,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 05:00:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2020-10-13 05:00:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 05:00:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:00:57,331 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:00:57,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 05:00:57,331 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:00:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:00:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1566535720, now seen corresponding path program 55 times [2020-10-13 05:00:57,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:00:57,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746285752] [2020-10-13 05:00:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:00:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:00:57,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:00:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:02,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-13 05:01:02,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:04,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:04,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:04,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746285752] [2020-10-13 05:01:04,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:04,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 05:01:04,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589823273] [2020-10-13 05:01:04,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 05:01:04,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:04,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 05:01:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:01:04,433 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand 59 states. [2020-10-13 05:01:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:04,769 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2020-10-13 05:01:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:01:04,769 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 124 [2020-10-13 05:01:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:04,771 INFO L225 Difference]: With dead ends: 158 [2020-10-13 05:01:04,772 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:01:04,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:01:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:01:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 05:01:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 05:01:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-13 05:01:04,778 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 124 [2020-10-13 05:01:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:04,778 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-13 05:01:04,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 05:01:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-13 05:01:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:01:04,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:04,780 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:04,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 05:01:04,782 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash -56154166, now seen corresponding path program 56 times [2020-10-13 05:01:04,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:04,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911023525] [2020-10-13 05:01:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:07,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:09,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:09,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:01:09,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 05:01:09,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 05:01:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 05:01:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:11,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:11,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:12,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911023525] [2020-10-13 05:01:12,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:12,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 05:01:12,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843277967] [2020-10-13 05:01:12,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 05:01:12,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 05:01:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:01:12,011 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 60 states. [2020-10-13 05:01:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:12,540 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-13 05:01:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 05:01:12,541 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 126 [2020-10-13 05:01:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:12,543 INFO L225 Difference]: With dead ends: 160 [2020-10-13 05:01:12,543 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 05:01:12,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:01:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 05:01:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 05:01:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 05:01:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2020-10-13 05:01:12,549 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 126 [2020-10-13 05:01:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:12,549 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2020-10-13 05:01:12,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 05:01:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2020-10-13 05:01:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 05:01:12,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:12,551 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:12,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 05:01:12,551 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash -388006164, now seen corresponding path program 57 times [2020-10-13 05:01:12,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:12,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41815425] [2020-10-13 05:01:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:12,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:17,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-13 05:01:17,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:19,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:19,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:19,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:19,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:19,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:19,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:19,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:19,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:19,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:19,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:19,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:19,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41815425] [2020-10-13 05:01:19,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:19,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 05:01:19,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60295055] [2020-10-13 05:01:19,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 05:01:19,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:19,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 05:01:19,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:01:19,845 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand 61 states. [2020-10-13 05:01:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:20,390 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2020-10-13 05:01:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 05:01:20,391 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 128 [2020-10-13 05:01:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:20,393 INFO L225 Difference]: With dead ends: 162 [2020-10-13 05:01:20,393 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 05:01:20,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:01:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 05:01:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-13 05:01:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 05:01:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2020-10-13 05:01:20,398 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 128 [2020-10-13 05:01:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:20,399 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2020-10-13 05:01:20,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 05:01:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2020-10-13 05:01:20,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 05:01:20,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:20,400 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:20,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 05:01:20,400 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:20,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1470196338, now seen corresponding path program 58 times [2020-10-13 05:01:20,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:20,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365775052] [2020-10-13 05:01:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:20,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:20,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:25,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:25,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 05:01:25,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 05:01:25,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 05:01:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-13 05:01:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:27,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:27,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:27,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365775052] [2020-10-13 05:01:27,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:27,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 05:01:27,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228919272] [2020-10-13 05:01:27,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 05:01:27,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 05:01:27,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:01:27,776 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand 62 states. [2020-10-13 05:01:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:28,314 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2020-10-13 05:01:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 05:01:28,315 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 130 [2020-10-13 05:01:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:28,317 INFO L225 Difference]: With dead ends: 164 [2020-10-13 05:01:28,317 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 05:01:28,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:01:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 05:01:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 05:01:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 05:01:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-13 05:01:28,323 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 130 [2020-10-13 05:01:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:28,324 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-13 05:01:28,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 05:01:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-13 05:01:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 05:01:28,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:28,325 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:28,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 05:01:28,325 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2072867920, now seen corresponding path program 59 times [2020-10-13 05:01:28,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:28,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146134698] [2020-10-13 05:01:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:28,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:28,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:33,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:33,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 05:01:33,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:01:33,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 05:01:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-13 05:01:33,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:35,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:35,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:35,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:35,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:35,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:35,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:35,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:35,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146134698] [2020-10-13 05:01:35,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:35,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 05:01:35,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082765457] [2020-10-13 05:01:35,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 05:01:35,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 05:01:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 05:01:35,778 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 63 states. [2020-10-13 05:01:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:36,331 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2020-10-13 05:01:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 05:01:36,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 132 [2020-10-13 05:01:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:36,333 INFO L225 Difference]: With dead ends: 166 [2020-10-13 05:01:36,333 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 05:01:36,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 05:01:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 05:01:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-13 05:01:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 05:01:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-10-13 05:01:36,338 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 132 [2020-10-13 05:01:36,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:36,338 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-10-13 05:01:36,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 05:01:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-10-13 05:01:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 05:01:36,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:36,339 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:36,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 05:01:36,340 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1419673262, now seen corresponding path program 60 times [2020-10-13 05:01:36,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:36,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205429669] [2020-10-13 05:01:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:36,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:41,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:41,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 05:01:41,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:01:41,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 05:01:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-13 05:01:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:43,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:43,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:43,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205429669] [2020-10-13 05:01:43,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:43,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 05:01:43,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623118615] [2020-10-13 05:01:43,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 05:01:43,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:43,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 05:01:43,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:01:43,885 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 64 states. [2020-10-13 05:01:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:44,200 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-10-13 05:01:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 05:01:44,200 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 134 [2020-10-13 05:01:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:44,202 INFO L225 Difference]: With dead ends: 168 [2020-10-13 05:01:44,202 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 05:01:44,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:01:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 05:01:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 05:01:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 05:01:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2020-10-13 05:01:44,206 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 134 [2020-10-13 05:01:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:44,207 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2020-10-13 05:01:44,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 05:01:44,207 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2020-10-13 05:01:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 05:01:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:44,208 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:44,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 05:01:44,208 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash -764832140, now seen corresponding path program 61 times [2020-10-13 05:01:44,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:44,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637974523] [2020-10-13 05:01:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:44,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:49,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:49,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:01:49,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:01:49,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 05:01:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-13 05:01:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:51,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:51,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:51,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:51,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:51,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:51,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:51,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:51,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:51,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637974523] [2020-10-13 05:01:51,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:51,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 05:01:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072280676] [2020-10-13 05:01:51,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 05:01:51,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:51,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 05:01:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 05:01:51,828 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 65 states. [2020-10-13 05:01:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:01:52,247 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2020-10-13 05:01:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 05:01:52,248 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 136 [2020-10-13 05:01:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:01:52,249 INFO L225 Difference]: With dead ends: 170 [2020-10-13 05:01:52,249 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 05:01:52,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 05:01:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 05:01:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-13 05:01:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 05:01:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-10-13 05:01:52,254 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 136 [2020-10-13 05:01:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:01:52,255 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-10-13 05:01:52,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 05:01:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-10-13 05:01:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 05:01:52,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:01:52,256 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:01:52,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 05:01:52,256 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:01:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:01:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1472260886, now seen corresponding path program 62 times [2020-10-13 05:01:52,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:01:52,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769341432] [2020-10-13 05:01:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:01:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:52,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:52,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:57,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:57,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-13 05:01:57,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:59,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:01:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:01:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:01:59,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:01:59,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:01:59,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:01:59,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:01:59,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:01:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:01:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:01:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:01:59,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:01:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:01:59,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769341432] [2020-10-13 05:01:59,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:01:59,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 05:01:59,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860933896] [2020-10-13 05:01:59,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 05:01:59,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:01:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 05:01:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 05:01:59,968 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 66 states. [2020-10-13 05:02:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:00,526 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2020-10-13 05:02:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 05:02:00,527 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 138 [2020-10-13 05:02:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:00,529 INFO L225 Difference]: With dead ends: 172 [2020-10-13 05:02:00,529 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 05:02:00,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 05:02:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 05:02:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-13 05:02:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 05:02:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2020-10-13 05:02:00,535 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 138 [2020-10-13 05:02:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:00,535 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2020-10-13 05:02:00,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 05:02:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2020-10-13 05:02:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 05:02:00,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:00,537 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:00,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 05:02:00,537 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -459956424, now seen corresponding path program 63 times [2020-10-13 05:02:00,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:00,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761212814] [2020-10-13 05:02:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:00,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:05,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:05,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 05:02:05,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:02:05,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 05:02:05,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:05,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-13 05:02:05,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:08,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:08,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:08,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:08,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:08,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:08,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:08,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:08,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:08,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:08,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:08,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761212814] [2020-10-13 05:02:08,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:08,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 05:02:08,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510787100] [2020-10-13 05:02:08,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 05:02:08,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:08,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 05:02:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 05:02:08,327 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand 67 states. [2020-10-13 05:02:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:08,942 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2020-10-13 05:02:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 05:02:08,943 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 140 [2020-10-13 05:02:08,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:08,945 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:02:08,945 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 05:02:08,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 05:02:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 05:02:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-13 05:02:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 05:02:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2020-10-13 05:02:08,951 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 140 [2020-10-13 05:02:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:08,951 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2020-10-13 05:02:08,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 05:02:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2020-10-13 05:02:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 05:02:08,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:08,952 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:08,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 05:02:08,953 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1894919462, now seen corresponding path program 64 times [2020-10-13 05:02:08,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:08,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196320848] [2020-10-13 05:02:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:09,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-13 05:02:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:16,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:16,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:16,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:16,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196320848] [2020-10-13 05:02:16,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:16,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 05:02:16,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880739852] [2020-10-13 05:02:16,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 05:02:16,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:16,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 05:02:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 05:02:16,860 INFO L87 Difference]: Start difference. First operand 154 states and 159 transitions. Second operand 68 states.