/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/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:46:47,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:46:47,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:46:47,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:46:47,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:46:47,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:46:47,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:46:47,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:46:47,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:46:47,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:46:47,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:46:47,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:46:47,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:46:47,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:46:47,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:46:47,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:46:47,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:46:47,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:46:47,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:46:47,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:46:47,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:46:47,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:46:47,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:46:47,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:46:47,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:46:47,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:46:47,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:46:47,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:46:47,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:46:47,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:46:47,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:46:47,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:46:47,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:46:47,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:46:47,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:46:47,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:46:47,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:46:47,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:46:47,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:46:47,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:46:47,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:46:47,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:46:47,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:46:47,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:46:47,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:46:47,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:46:47,808 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:46:47,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:46:47,809 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:46:47,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:46:47,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:46:47,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:46:47,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:46:47,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:46:47,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:46:47,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:46:47,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:46:47,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:46:47,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:46:47,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:46:47,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:46:47,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:46:47,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:46:47,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:46:47,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:46:47,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:46:47,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:46:47,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:46:47,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:46:47,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:46:47,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:46:47,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:46:48,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:46:48,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:46:48,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:46:48,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:46:48,148 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:46:48,149 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-13 10:46:48,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bd89af1b/b2b0766c5b034b4c9f2f82612b2ad10a/FLAG052e7621e [2020-10-13 10:46:48,590 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:46:48,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-13 10:46:48,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bd89af1b/b2b0766c5b034b4c9f2f82612b2ad10a/FLAG052e7621e [2020-10-13 10:46:48,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bd89af1b/b2b0766c5b034b4c9f2f82612b2ad10a [2020-10-13 10:46:49,007 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:46:49,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:46:49,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:46:49,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:46:49,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:46:49,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:48" (1/1) ... [2020-10-13 10:46:49,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49, skipping insertion in model container [2020-10-13 10:46:49,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:48" (1/1) ... [2020-10-13 10:46:49,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:46:49,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:46:49,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:46:49,281 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:46:49,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:46:49,310 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:46:49,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49 WrapperNode [2020-10-13 10:46:49,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:46:49,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:46:49,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:46:49,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:46:49,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... [2020-10-13 10:46:49,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:46:49,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:46:49,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:46:49,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:46:49,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:46:49,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:46:49,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:46:49,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:46:49,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:46:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:46:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:46:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:46:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:46:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:46:49,665 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:46:49,665 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:46:49,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:49 BoogieIcfgContainer [2020-10-13 10:46:49,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:46:49,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:46:49,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:46:49,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:46:49,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:46:48" (1/3) ... [2020-10-13 10:46:49,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f1e7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:49, skipping insertion in model container [2020-10-13 10:46:49,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:49" (2/3) ... [2020-10-13 10:46:49,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f1e7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:49, skipping insertion in model container [2020-10-13 10:46:49,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:49" (3/3) ... [2020-10-13 10:46:49,678 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2020-10-13 10:46:49,689 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:46:49,696 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:46:49,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:46:49,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:46:49,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:46:49,732 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:46:49,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:46:49,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:46:49,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:46:49,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:46:49,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:46:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-13 10:46:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:46:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:49,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:49,755 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-13 10:46:49,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:49,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107734605] [2020-10-13 10:46:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:49,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:49,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:49,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:46:49,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:49,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 10:46:49,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:46:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:46:49,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:46:50,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:50,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:50,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:50,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:50,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:46:50,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:50,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:50,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:50,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:50,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:50,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107734605] [2020-10-13 10:46:50,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:46:50,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:46:50,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40351257] [2020-10-13 10:46:50,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:46:50,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:46:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:46:50,107 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-13 10:46:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:50,186 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:46:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:46:50,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:46:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:50,198 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:46:50,198 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:46:50,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:46:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:46:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:46:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:46:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-13 10:46:50,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-13 10:46:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:50,272 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-13 10:46:50,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:46:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-13 10:46:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:46:50,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:50,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:50,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:46:50,274 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-13 10:46:50,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:50,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60440722] [2020-10-13 10:46:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:50,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:50,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:50,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:46:50,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:50,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-13 10:46:50,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:50,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:46:50,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:46:50,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:50,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:50,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:50,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:50,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:50,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:50,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:46:50,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:50,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:50,637 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 10:46:50,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60440722] [2020-10-13 10:46:50,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:50,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:46:50,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231790454] [2020-10-13 10:46:50,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:46:50,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:50,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:46:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:46:50,645 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-13 10:46:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:50,662 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-13 10:46:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:46:50,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-13 10:46:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:50,664 INFO L225 Difference]: With dead ends: 18 [2020-10-13 10:46:50,664 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:46:50,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:46:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:46:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:46:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:46:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:46:50,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-13 10:46:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:50,671 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:46:50,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:46:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:46:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:46:50,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:50,672 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:50,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:46:50,673 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-13 10:46:50,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:50,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656031290] [2020-10-13 10:46:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:50,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:50,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:46:50,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-13 10:46:50,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:46:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:46:50,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:50,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:50,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:50,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:50,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:50,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:46:50,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:50,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:50,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:50,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:50,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656031290] [2020-10-13 10:46:50,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:50,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:46:50,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681339280] [2020-10-13 10:46:50,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:46:50,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:46:50,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:46:50,860 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-13 10:46:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:50,887 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-13 10:46:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:46:50,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:46:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:50,889 INFO L225 Difference]: With dead ends: 19 [2020-10-13 10:46:50,889 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:46:50,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:46:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:46:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:46:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:46:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-13 10:46:50,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-13 10:46:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:50,899 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-13 10:46:50,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:46:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-13 10:46:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:46:50,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:50,900 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:50,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:46:50,901 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:50,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-13 10:46:50,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:50,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891903251] [2020-10-13 10:46:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:50,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:51,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:51,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:46:51,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 10:46:51,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:46:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:46:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:51,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:51,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:51,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:51,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:51,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:51,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:46:51,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:51,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:51,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891903251] [2020-10-13 10:46:51,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:51,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:46:51,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625287574] [2020-10-13 10:46:51,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:46:51,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:51,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:46:51,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:46:51,243 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-13 10:46:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:51,280 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-13 10:46:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:46:51,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-13 10:46:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:51,282 INFO L225 Difference]: With dead ends: 20 [2020-10-13 10:46:51,282 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:46:51,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:46:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:46:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:46:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:46:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:46:51,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-13 10:46:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:51,292 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:46:51,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:46:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:46:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:46:51,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:51,301 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:51,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:46:51,301 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-13 10:46:51,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:51,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058818836] [2020-10-13 10:46:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:51,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:51,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:46:51,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-13 10:46:51,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:46:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:46:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:51,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:51,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:51,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:51,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:51,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:51,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:51,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:51,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:51,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058818836] [2020-10-13 10:46:51,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:51,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:46:51,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270908173] [2020-10-13 10:46:51,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:46:51,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:46:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:46:51,553 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-13 10:46:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:51,587 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:46:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:46:51,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:46:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:51,589 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:46:51,589 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:46:51,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:46:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:46:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:46:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:46:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-13 10:46:51,594 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-13 10:46:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:51,595 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-13 10:46:51,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:46:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-13 10:46:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:46:51,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:51,596 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:51,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:46:51,596 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-13 10:46:51,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:51,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031365605] [2020-10-13 10:46:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:51,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:51,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:46:51,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 10:46:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:46:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:46:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:51,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:51,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:51,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:51,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:51,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:51,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:51,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:51,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031365605] [2020-10-13 10:46:51,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:51,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:46:51,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653170976] [2020-10-13 10:46:51,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:46:51,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:51,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:46:51,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:46:51,802 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-13 10:46:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:51,846 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-13 10:46:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:46:51,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-13 10:46:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:51,847 INFO L225 Difference]: With dead ends: 22 [2020-10-13 10:46:51,848 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:46:51,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:46:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:46:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:46:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:46:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:46:51,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-13 10:46:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:51,854 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:46:51,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:46:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:46:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:46:51,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:51,855 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:51,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:46:51,855 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-13 10:46:51,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:51,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764564500] [2020-10-13 10:46:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:51,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:52,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:52,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:46:52,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:52,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 10:46:52,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:46:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:46:52,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:52,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:52,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:52,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:52,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:52,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:52,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:52,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:52,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:52,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:52,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:52,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764564500] [2020-10-13 10:46:52,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:52,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:46:52,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212450628] [2020-10-13 10:46:52,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:46:52,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:52,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:46:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:46:52,139 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-13 10:46:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:52,188 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-13 10:46:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:46:52,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-13 10:46:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:52,190 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:46:52,190 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:46:52,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:46:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:46:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 10:46:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:46:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-13 10:46:52,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-13 10:46:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:52,196 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-13 10:46:52,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:46:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-13 10:46:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:46:52,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:52,197 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:52,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:46:52,197 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash -6162383, now seen corresponding path program 7 times [2020-10-13 10:46:52,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:52,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055659846] [2020-10-13 10:46:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:52,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:52,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:52,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:46:52,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-13 10:46:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:46:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:46:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:52,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:52,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:52,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:52,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:52,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:52,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:52,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:52,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:52,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:52,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:52,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:52,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055659846] [2020-10-13 10:46:52,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:52,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:46:52,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255821018] [2020-10-13 10:46:52,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:46:52,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:46:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:46:52,476 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-10-13 10:46:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:52,537 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-13 10:46:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:46:52,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-13 10:46:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:52,539 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:46:52,539 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:46:52,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:46:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:46:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:46:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:46:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-13 10:46:52,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-13 10:46:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:52,545 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-13 10:46:52,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:46:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-13 10:46:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:46:52,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:52,546 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:52,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:46:52,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:52,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash -154572610, now seen corresponding path program 8 times [2020-10-13 10:46:52,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:52,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200735197] [2020-10-13 10:46:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:52,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:52,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:52,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:46:52,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:52,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-13 10:46:52,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:52,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:46:52,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:52,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:46:52,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:52,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:52,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:52,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:52,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:52,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:52,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:52,869 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 10:46:52,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200735197] [2020-10-13 10:46:52,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:52,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:46:52,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752631120] [2020-10-13 10:46:52,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:46:52,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:52,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:46:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:46:52,872 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2020-10-13 10:46:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:52,950 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-13 10:46:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:46:52,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-13 10:46:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:52,952 INFO L225 Difference]: With dead ends: 25 [2020-10-13 10:46:52,952 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:46:52,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:46:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:46:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:46:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:46:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-13 10:46:52,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-13 10:46:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:52,958 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-13 10:46:52,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:46:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-13 10:46:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:46:52,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:52,959 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:52,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:46:52,959 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -460322351, now seen corresponding path program 9 times [2020-10-13 10:46:52,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:52,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83357136] [2020-10-13 10:46:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:52,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:53,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:53,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:46:53,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:53,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 10:46:53,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:53,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:46:53,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:53,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:46:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:53,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:53,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:53,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:53,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:53,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:53,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:53,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83357136] [2020-10-13 10:46:53,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:53,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:46:53,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553535997] [2020-10-13 10:46:53,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:46:53,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:53,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:46:53,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:46:53,337 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2020-10-13 10:46:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:53,440 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-13 10:46:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:46:53,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-13 10:46:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:53,441 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:46:53,441 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:46:53,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:46:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:46:53,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:46:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:46:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-13 10:46:53,465 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-13 10:46:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:53,465 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-13 10:46:53,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:46:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-13 10:46:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:46:53,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:53,466 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:53,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:46:53,467 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:53,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 10 times [2020-10-13 10:46:53,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:53,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438544374] [2020-10-13 10:46:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:53,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:53,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:46:53,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:53,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-13 10:46:53,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:46:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:46:53,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:53,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:53,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:53,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:53,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:53,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:53,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:46:53,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:53,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:53,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438544374] [2020-10-13 10:46:53,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:53,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:46:53,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860008392] [2020-10-13 10:46:53,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:46:53,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:53,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:46:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:46:53,921 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2020-10-13 10:46:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:54,024 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-13 10:46:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:46:54,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-13 10:46:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:54,026 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:46:54,026 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:46:54,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:46:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:46:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:46:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:46:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-13 10:46:54,031 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-13 10:46:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:54,032 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-13 10:46:54,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:46:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-13 10:46:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:46:54,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:54,033 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:54,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:46:54,033 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:54,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1178612593, now seen corresponding path program 11 times [2020-10-13 10:46:54,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:54,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711524255] [2020-10-13 10:46:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:54,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:54,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:46:54,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:54,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-13 10:46:54,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:46:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:46:54,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:54,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:54,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:54,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:54,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:54,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:54,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:54,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711524255] [2020-10-13 10:46:54,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:54,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:46:54,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348528125] [2020-10-13 10:46:54,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:46:54,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:46:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:46:54,525 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2020-10-13 10:46:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:54,638 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-13 10:46:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:46:54,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-13 10:46:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:54,639 INFO L225 Difference]: With dead ends: 28 [2020-10-13 10:46:54,639 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:46:54,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:46:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:46:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:46:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:46:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-13 10:46:54,644 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-13 10:46:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:54,645 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-13 10:46:54,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:46:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-13 10:46:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:46:54,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:54,646 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:54,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:46:54,646 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2081254018, now seen corresponding path program 12 times [2020-10-13 10:46:54,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:54,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428378422] [2020-10-13 10:46:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:54,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:54,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:54,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:46:54,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:54,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 10:46:54,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:54,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:46:54,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:54,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:46:54,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:55,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:55,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:55,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:55,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:55,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:55,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:55,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:55,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428378422] [2020-10-13 10:46:55,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:55,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:46:55,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059288119] [2020-10-13 10:46:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:46:55,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:46:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:46:55,194 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-10-13 10:46:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:55,328 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-13 10:46:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:46:55,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-13 10:46:55,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:55,329 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:46:55,329 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:46:55,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:46:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:46:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:46:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:46:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-13 10:46:55,334 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-13 10:46:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:55,335 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-13 10:46:55,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:46:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-13 10:46:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:46:55,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:55,336 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:55,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:46:55,336 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -57903855, now seen corresponding path program 13 times [2020-10-13 10:46:55,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:55,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123787598] [2020-10-13 10:46:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:55,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:55,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:55,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:46:55,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:55,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-13 10:46:55,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:55,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:46:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:46:55,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:55,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:55,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:55,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:55,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:55,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:55,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:55,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:55,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:55,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123787598] [2020-10-13 10:46:55,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:55,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:46:55,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722343008] [2020-10-13 10:46:55,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:46:55,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:46:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:46:55,958 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2020-10-13 10:46:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:56,116 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-13 10:46:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:46:56,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-10-13 10:46:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:56,118 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:46:56,118 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:46:56,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:46:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:46:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 10:46:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:46:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-13 10:46:56,123 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-13 10:46:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:56,123 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-13 10:46:56,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:46:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-13 10:46:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:46:56,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:56,124 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:56,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:46:56,125 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1758558242, now seen corresponding path program 14 times [2020-10-13 10:46:56,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:56,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648905217] [2020-10-13 10:46:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:56,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:56,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:46:56,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:56,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-13 10:46:56,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:46:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:46:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:56,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:56,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:56,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:56,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:56,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:56,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:56,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648905217] [2020-10-13 10:46:56,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:56,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:46:56,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873752199] [2020-10-13 10:46:56,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:46:56,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:46:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:46:56,725 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-10-13 10:46:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:56,890 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-13 10:46:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:46:56,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-13 10:46:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:56,891 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:46:56,892 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:46:56,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:46:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:46:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:46:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:46:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-13 10:46:56,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-13 10:46:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:56,897 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-13 10:46:56,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:46:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-13 10:46:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:46:56,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:56,898 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:56,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:46:56,898 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1355730609, now seen corresponding path program 15 times [2020-10-13 10:46:56,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:56,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602496254] [2020-10-13 10:46:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:57,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:57,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:46:57,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:57,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-13 10:46:57,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:46:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:46:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:57,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:57,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:57,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:57,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:57,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:57,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:57,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:57,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602496254] [2020-10-13 10:46:57,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:57,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:46:57,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893596891] [2020-10-13 10:46:57,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:46:57,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:46:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:46:57,594 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2020-10-13 10:46:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:57,783 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-13 10:46:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:46:57,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-10-13 10:46:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:57,784 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:46:57,784 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:46:57,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:46:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:46:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:46:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:46:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-13 10:46:57,790 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-13 10:46:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:57,790 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-13 10:46:57,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:46:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-13 10:46:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:46:57,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:57,791 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:57,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:46:57,792 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:57,792 INFO L82 PathProgramCache]: Analyzing trace with hash -885562818, now seen corresponding path program 16 times [2020-10-13 10:46:57,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:57,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699041684] [2020-10-13 10:46:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:57,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:58,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:58,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:46:58,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:58,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-13 10:46:58,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:58,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:46:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:46:58,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:58,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:58,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:58,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:58,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:58,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:58,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:58,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:58,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699041684] [2020-10-13 10:46:58,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:58,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:46:58,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116443353] [2020-10-13 10:46:58,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:46:58,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:46:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:46:58,613 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2020-10-13 10:46:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:58,820 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-13 10:46:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:46:58,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-13 10:46:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:58,821 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:46:58,821 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:46:58,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:46:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:46:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 10:46:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:46:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-13 10:46:58,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-13 10:46:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:58,827 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-13 10:46:58,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:46:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-13 10:46:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:46:58,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:58,828 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:58,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:46:58,828 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:58,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1646182319, now seen corresponding path program 17 times [2020-10-13 10:46:58,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:58,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57982920] [2020-10-13 10:46:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:58,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:46:59,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-13 10:46:59,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:46:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:46:59,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:59,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:59,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:59,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:59,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:46:59,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57982920] [2020-10-13 10:46:59,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:59,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:46:59,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082917037] [2020-10-13 10:46:59,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:46:59,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:46:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:46:59,723 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2020-10-13 10:47:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:00,026 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-13 10:47:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:47:00,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-10-13 10:47:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:00,028 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:47:00,028 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:47:00,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:47:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:47:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:47:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:47:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-13 10:47:00,034 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-13 10:47:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:00,034 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-13 10:47:00,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:47:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-13 10:47:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:47:00,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,035 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:47:00,036 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash 544416926, now seen corresponding path program 18 times [2020-10-13 10:47:00,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383710434] [2020-10-13 10:47:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:47:00,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-13 10:47:00,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:47:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:47:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:01,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:01,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:01,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:01,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:01,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383710434] [2020-10-13 10:47:01,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:01,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:47:01,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870779575] [2020-10-13 10:47:01,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:47:01,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:47:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:47:01,185 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2020-10-13 10:47:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:01,432 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-13 10:47:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:47:01,433 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-13 10:47:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:01,433 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:47:01,433 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:47:01,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:47:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:47:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 10:47:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:47:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-13 10:47:01,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-13 10:47:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:01,439 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-13 10:47:01,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:47:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-13 10:47:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:47:01,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:01,440 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:01,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:47:01,440 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:01,441 INFO L82 PathProgramCache]: Analyzing trace with hash -266483215, now seen corresponding path program 19 times [2020-10-13 10:47:01,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:01,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612023170] [2020-10-13 10:47:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:47:02,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-13 10:47:02,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:47:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:47:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:02,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612023170] [2020-10-13 10:47:02,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:02,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:47:02,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085901241] [2020-10-13 10:47:02,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:47:02,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:47:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:47:02,550 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2020-10-13 10:47:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:02,809 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-13 10:47:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:47:02,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-10-13 10:47:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:02,811 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:47:02,811 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:47:02,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:47:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:47:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:47:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:47:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-13 10:47:02,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-13 10:47:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:02,817 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-13 10:47:02,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:47:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-13 10:47:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:47:02,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:02,818 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:02,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:47:02,819 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:02,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:02,819 INFO L82 PathProgramCache]: Analyzing trace with hash 365416190, now seen corresponding path program 20 times [2020-10-13 10:47:02,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:02,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084586829] [2020-10-13 10:47:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:03,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:03,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:47:03,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:03,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-13 10:47:03,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:47:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:47:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:04,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:04,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:04,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:04,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:04,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084586829] [2020-10-13 10:47:04,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:04,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:47:04,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168163077] [2020-10-13 10:47:04,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:47:04,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:47:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:47:04,042 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2020-10-13 10:47:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:04,331 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-13 10:47:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:47:04,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-13 10:47:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:04,332 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:47:04,333 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:47:04,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:47:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:47:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 10:47:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:47:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-13 10:47:04,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-13 10:47:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:04,340 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-13 10:47:04,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:47:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-13 10:47:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:47:04,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:04,342 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:04,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:47:04,342 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1520538735, now seen corresponding path program 21 times [2020-10-13 10:47:04,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:04,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667921340] [2020-10-13 10:47:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:04,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:04,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:47:04,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:04,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-13 10:47:04,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:04,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:47:04,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:04,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:47:04,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:05,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:05,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:05,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:05,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:05,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667921340] [2020-10-13 10:47:05,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:05,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:47:05,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287209439] [2020-10-13 10:47:05,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:47:05,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:47:05,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:47:05,424 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2020-10-13 10:47:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:05,747 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-13 10:47:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:47:05,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-10-13 10:47:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:05,750 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:47:05,750 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:47:05,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:47:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:47:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 10:47:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:47:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-13 10:47:05,757 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-13 10:47:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:05,757 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-13 10:47:05,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:47:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-13 10:47:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:47:05,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:05,758 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:05,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:47:05,758 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 22 times [2020-10-13 10:47:05,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:05,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898843822] [2020-10-13 10:47:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:47:06,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-13 10:47:06,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:47:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:47:06,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:07,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:07,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:07,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:07,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:07,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:07,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:07,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:07,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:07,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:07,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898843822] [2020-10-13 10:47:07,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:07,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:47:07,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995044684] [2020-10-13 10:47:07,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:47:07,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:47:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:47:07,049 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2020-10-13 10:47:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:07,386 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-13 10:47:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:47:07,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-13 10:47:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:07,387 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:47:07,388 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:47:07,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:47:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:47:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 10:47:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:47:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-13 10:47:07,394 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-13 10:47:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:07,400 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-13 10:47:07,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:47:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-13 10:47:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:47:07,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:07,401 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:07,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:47:07,401 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 217916721, now seen corresponding path program 23 times [2020-10-13 10:47:07,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:07,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107275975] [2020-10-13 10:47:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:07,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:08,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:08,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:47:08,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:08,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-13 10:47:08,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:47:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:47:08,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:08,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:08,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:08,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107275975] [2020-10-13 10:47:08,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:08,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:47:08,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358583163] [2020-10-13 10:47:08,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:47:08,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:08,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:47:08,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:47:08,663 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2020-10-13 10:47:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:09,125 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-13 10:47:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:47:09,132 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2020-10-13 10:47:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:09,132 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:47:09,132 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:47:09,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:47:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:47:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:47:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:47:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-13 10:47:09,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-13 10:47:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:09,142 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-13 10:47:09,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:47:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-13 10:47:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:47:09,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:09,143 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:09,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:47:09,146 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1798054978, now seen corresponding path program 24 times [2020-10-13 10:47:09,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:09,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845448221] [2020-10-13 10:47:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:10,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:10,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:47:10,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:10,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-13 10:47:10,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:47:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:47:10,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:10,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:10,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:10,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:10,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845448221] [2020-10-13 10:47:10,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:10,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:47:10,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541393478] [2020-10-13 10:47:10,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:47:10,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:47:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:47:10,679 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2020-10-13 10:47:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:11,111 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-13 10:47:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:47:11,112 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-13 10:47:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:11,113 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:47:11,113 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:47:11,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:47:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:47:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 10:47:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:47:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-13 10:47:11,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-13 10:47:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:11,117 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-13 10:47:11,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:47:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-13 10:47:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:47:11,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:11,118 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:11,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:47:11,118 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash 131331793, now seen corresponding path program 25 times [2020-10-13 10:47:11,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:11,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600739556] [2020-10-13 10:47:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:11,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:11,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:11,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:47:11,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-13 10:47:11,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:47:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:47:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:12,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:12,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:12,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:12,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:12,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:12,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:12,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600739556] [2020-10-13 10:47:12,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:12,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:47:12,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528605094] [2020-10-13 10:47:12,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:47:12,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:47:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:47:12,389 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2020-10-13 10:47:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:12,886 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-13 10:47:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:47:12,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-10-13 10:47:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:12,888 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:47:12,888 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:47:12,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:47:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:47:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 10:47:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:47:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-13 10:47:12,893 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-13 10:47:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:12,893 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-13 10:47:12,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:47:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-13 10:47:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:47:12,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:12,894 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:12,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:47:12,894 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash -187220450, now seen corresponding path program 26 times [2020-10-13 10:47:12,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:12,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134130357] [2020-10-13 10:47:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:12,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:13,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:13,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:47:13,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:13,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 10:47:13,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:13,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:47:13,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:13,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:47:13,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:14,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:14,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:14,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:14,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:14,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134130357] [2020-10-13 10:47:14,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:14,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:47:14,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735013556] [2020-10-13 10:47:14,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:47:14,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:47:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:47:14,392 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2020-10-13 10:47:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:14,922 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-13 10:47:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:47:14,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2020-10-13 10:47:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:14,923 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:47:14,924 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:47:14,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:47:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:47:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 10:47:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:47:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-13 10:47:14,929 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-13 10:47:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:14,929 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-13 10:47:14,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:47:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-13 10:47:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:47:14,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:14,930 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:14,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:47:14,930 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1472405391, now seen corresponding path program 27 times [2020-10-13 10:47:14,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:14,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966711987] [2020-10-13 10:47:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:14,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:15,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:47:15,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:16,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:16,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:16,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:16,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:16,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:16,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:16,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:16,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966711987] [2020-10-13 10:47:16,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:16,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:47:16,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785198377] [2020-10-13 10:47:16,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:47:16,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:47:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:47:16,442 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2020-10-13 10:47:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:16,990 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-13 10:47:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:47:16,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-10-13 10:47:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:16,993 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:47:16,993 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:47:16,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:47:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:47:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:47:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:47:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-13 10:47:16,999 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-13 10:47:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:16,999 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-13 10:47:16,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:47:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-13 10:47:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:47:17,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:17,000 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:17,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:47:17,001 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1636534398, now seen corresponding path program 28 times [2020-10-13 10:47:17,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:17,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073845329] [2020-10-13 10:47:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:17,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:17,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:17,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:47:17,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:17,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-13 10:47:17,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:47:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:47:17,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:18,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:18,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:18,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:18,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:18,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:18,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:18,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:18,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:18,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:18,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073845329] [2020-10-13 10:47:18,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:18,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:47:18,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309136374] [2020-10-13 10:47:18,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:47:18,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:47:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:47:18,594 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2020-10-13 10:47:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:19,166 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-13 10:47:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:47:19,168 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-10-13 10:47:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:19,169 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:47:19,169 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:47:19,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:47:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:47:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 10:47:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:47:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-13 10:47:19,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-13 10:47:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:19,174 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-13 10:47:19,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:47:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-13 10:47:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:47:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:19,175 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:19,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:47:19,175 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash -770579951, now seen corresponding path program 29 times [2020-10-13 10:47:19,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:19,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146643756] [2020-10-13 10:47:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:19,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:19,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:47:19,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:19,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-13 10:47:19,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:47:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:47:19,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:20,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:20,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:20,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:20,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:20,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:20,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:20,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146643756] [2020-10-13 10:47:20,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:20,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:47:20,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949994176] [2020-10-13 10:47:20,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:47:20,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:47:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:47:20,605 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2020-10-13 10:47:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:21,227 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-13 10:47:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:47:21,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-10-13 10:47:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:21,228 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:47:21,228 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:47:21,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:47:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:47:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:47:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:47:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-13 10:47:21,234 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-13 10:47:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:21,234 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-13 10:47:21,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:47:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-13 10:47:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:47:21,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:21,235 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:21,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:47:21,236 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1918286558, now seen corresponding path program 30 times [2020-10-13 10:47:21,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:21,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408310061] [2020-10-13 10:47:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:21,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:22,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:47:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:23,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:23,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:23,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:23,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408310061] [2020-10-13 10:47:23,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:23,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:47:23,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126157976] [2020-10-13 10:47:23,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:47:23,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:23,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:47:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:47:23,043 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2020-10-13 10:47:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:23,700 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-13 10:47:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:47:23,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-10-13 10:47:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:23,703 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:47:23,703 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:47:23,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:47:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:47:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 10:47:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:47:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-13 10:47:23,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-13 10:47:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:23,708 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-13 10:47:23,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:47:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-13 10:47:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:47:23,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:23,708 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:23,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:47:23,709 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -626197583, now seen corresponding path program 31 times [2020-10-13 10:47:23,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:23,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139545066] [2020-10-13 10:47:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:23,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:25,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:25,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:25,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:25,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:25,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:25,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139545066] [2020-10-13 10:47:25,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:25,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:47:25,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444115357] [2020-10-13 10:47:25,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:47:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:47:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:47:25,662 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2020-10-13 10:47:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:26,361 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-13 10:47:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:47:26,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2020-10-13 10:47:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:26,362 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:47:26,362 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:47:26,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:47:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:47:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:47:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:47:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-13 10:47:26,367 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-13 10:47:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:26,368 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-13 10:47:26,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:47:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-13 10:47:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:47:26,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:26,369 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:26,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:47:26,369 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2099172670, now seen corresponding path program 32 times [2020-10-13 10:47:26,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:26,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569773878] [2020-10-13 10:47:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:47:27,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:47:27,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:28,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:28,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:28,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:28,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:28,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569773878] [2020-10-13 10:47:28,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:28,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:47:28,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110126580] [2020-10-13 10:47:28,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:47:28,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:47:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:47:28,155 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2020-10-13 10:47:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:28,858 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-13 10:47:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:47:28,859 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2020-10-13 10:47:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:28,859 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:47:28,860 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:47:28,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:47:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:47:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:47:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:47:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-13 10:47:28,864 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-13 10:47:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:28,864 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-13 10:47:28,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:47:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-13 10:47:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:47:28,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:28,865 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:28,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:47:28,865 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash 686304593, now seen corresponding path program 33 times [2020-10-13 10:47:28,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:28,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651732283] [2020-10-13 10:47:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:28,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:29,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:47:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-13 10:47:29,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:47:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:47:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:30,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:30,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:30,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:30,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651732283] [2020-10-13 10:47:30,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:30,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:47:30,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8151752] [2020-10-13 10:47:30,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:47:30,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:47:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:47:30,892 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2020-10-13 10:47:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:33,645 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-13 10:47:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:47:33,714 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-10-13 10:47:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:33,715 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:47:33,715 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:47:33,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:47:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:47:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 10:47:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:47:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-13 10:47:33,720 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-13 10:47:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:33,720 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-13 10:47:33,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:47:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-13 10:47:33,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:47:33,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:33,721 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:33,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:47:33,721 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:33,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash -162932834, now seen corresponding path program 34 times [2020-10-13 10:47:33,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:33,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734035284] [2020-10-13 10:47:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:33,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:34,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:34,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:47:34,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:35,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:35,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:35,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:35,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:35,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734035284] [2020-10-13 10:47:35,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:35,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:47:35,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330143732] [2020-10-13 10:47:35,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:47:35,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:35,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:47:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:47:35,724 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2020-10-13 10:47:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:36,621 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-13 10:47:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:47:36,622 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-10-13 10:47:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:36,623 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:47:36,623 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:47:36,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:47:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:47:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:47:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:47:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-13 10:47:36,627 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-13 10:47:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:36,628 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-13 10:47:36,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:47:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-13 10:47:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:47:36,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:36,629 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:36,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:47:36,629 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash -719489295, now seen corresponding path program 35 times [2020-10-13 10:47:36,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:36,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905847263] [2020-10-13 10:47:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:37,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:37,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:47:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:38,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:38,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:38,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:38,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:38,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:38,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905847263] [2020-10-13 10:47:38,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:38,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:47:38,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663967624] [2020-10-13 10:47:38,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:47:38,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:47:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:47:38,796 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2020-10-13 10:47:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:39,676 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-13 10:47:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:47:39,678 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2020-10-13 10:47:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:39,679 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:47:39,679 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:47:39,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:47:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:47:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:47:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:47:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-13 10:47:39,685 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-13 10:47:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:39,685 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-13 10:47:39,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:47:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-13 10:47:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:47:39,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:39,686 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:39,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:47:39,686 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -792870402, now seen corresponding path program 36 times [2020-10-13 10:47:39,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:39,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249586908] [2020-10-13 10:47:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:39,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:40,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:40,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:47:40,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-13 10:47:40,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:47:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:47:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:42,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:42,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:42,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:42,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:42,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:42,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:42,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249586908] [2020-10-13 10:47:42,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:42,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:47:42,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748780734] [2020-10-13 10:47:42,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:47:42,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:47:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:47:42,412 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2020-10-13 10:47:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:43,428 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-13 10:47:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:47:43,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2020-10-13 10:47:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:43,430 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:47:43,430 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:47:43,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:47:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:47:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 10:47:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:47:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-13 10:47:43,435 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-13 10:47:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:43,436 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-13 10:47:43,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:47:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-13 10:47:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:47:43,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:43,437 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:43,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:47:43,437 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1227282577, now seen corresponding path program 37 times [2020-10-13 10:47:43,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:43,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882314313] [2020-10-13 10:47:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:43,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:44,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:44,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:47:44,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:44,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-10-13 10:47:44,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:47:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:47:44,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:45,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:45,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:45,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:45,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:45,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:45,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882314313] [2020-10-13 10:47:45,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:45,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:47:45,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843935729] [2020-10-13 10:47:45,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:47:45,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:47:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:47:45,717 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2020-10-13 10:47:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:46,747 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-13 10:47:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:47:46,748 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2020-10-13 10:47:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:46,748 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:47:46,748 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:47:46,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:47:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:47:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 10:47:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:47:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-13 10:47:46,756 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-13 10:47:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:46,756 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-13 10:47:46,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:47:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-13 10:47:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:47:46,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:46,756 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:46,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:47:46,757 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:46,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash -572484514, now seen corresponding path program 38 times [2020-10-13 10:47:46,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:46,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357703152] [2020-10-13 10:47:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:46,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:47,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:47,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:47:47,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:47,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-10-13 10:47:47,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:47:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:47:47,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:49,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:49,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:49,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:49,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:49,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:49,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:49,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:49,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:49,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:49,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:49,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:49,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357703152] [2020-10-13 10:47:49,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:49,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:47:49,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071364115] [2020-10-13 10:47:49,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:47:49,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:49,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:47:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:47:49,399 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2020-10-13 10:47:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:50,533 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-13 10:47:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:47:50,533 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2020-10-13 10:47:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:50,534 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:47:50,534 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:47:50,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:47:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:47:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 10:47:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:47:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-13 10:47:50,539 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-13 10:47:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:50,540 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-13 10:47:50,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:47:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-13 10:47:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:47:50,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:50,541 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:50,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:47:50,541 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash -530689487, now seen corresponding path program 39 times [2020-10-13 10:47:50,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:50,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393665224] [2020-10-13 10:47:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:50,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1559 [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:47:52,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:53,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:53,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:53,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:53,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:53,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:53,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:53,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:53,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:53,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393665224] [2020-10-13 10:47:53,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:53,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:47:53,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866078369] [2020-10-13 10:47:53,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:47:53,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:53,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:47:53,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:47:53,625 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2020-10-13 10:47:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:54,739 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-13 10:47:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:47:54,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2020-10-13 10:47:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:54,741 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:47:54,741 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:47:54,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:47:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:47:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:47:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:47:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-13 10:47:54,746 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-13 10:47:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:54,746 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-13 10:47:54,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:47:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-13 10:47:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:47:54,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:54,747 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:54,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:47:54,747 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:54,748 INFO L82 PathProgramCache]: Analyzing trace with hash 764956350, now seen corresponding path program 40 times [2020-10-13 10:47:54,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:54,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227095950] [2020-10-13 10:47:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:54,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:55,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:47:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:57,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:57,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227095950] [2020-10-13 10:47:57,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:57,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:47:57,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497318693] [2020-10-13 10:47:57,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:47:57,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:57,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:47:57,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:47:57,391 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2020-10-13 10:47:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:58,678 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-13 10:47:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:47:58,681 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2020-10-13 10:47:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:58,682 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:47:58,682 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:47:58,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:47:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:47:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 10:47:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:47:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-13 10:47:58,688 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-13 10:47:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:58,688 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-13 10:47:58,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:47:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-13 10:47:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:47:58,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:58,689 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:58,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:47:58,694 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2019695663, now seen corresponding path program 41 times [2020-10-13 10:47:58,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:58,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964043810] [2020-10-13 10:47:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:00,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:48:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:01,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:01,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:01,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:01,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:01,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:01,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:01,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:01,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:01,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:01,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:01,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964043810] [2020-10-13 10:48:01,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:01,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:48:01,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319933375] [2020-10-13 10:48:01,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:48:01,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:48:01,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:48:01,999 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2020-10-13 10:48:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:03,327 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-13 10:48:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:48:03,329 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2020-10-13 10:48:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:03,330 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:48:03,330 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:48:03,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:48:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:48:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 10:48:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:48:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-13 10:48:03,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-13 10:48:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:03,336 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-13 10:48:03,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:48:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-13 10:48:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:48:03,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:03,337 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:03,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:48:03,337 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1850405150, now seen corresponding path program 42 times [2020-10-13 10:48:03,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:03,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453832396] [2020-10-13 10:48:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:03,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:04,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:04,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:48:04,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-13 10:48:04,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:48:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:48:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:06,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:06,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:06,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:06,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:06,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:06,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:06,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:06,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:06,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:06,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:06,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:06,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453832396] [2020-10-13 10:48:06,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:06,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:48:06,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141646135] [2020-10-13 10:48:06,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:48:06,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:48:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:48:06,429 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2020-10-13 10:48:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:07,815 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-13 10:48:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:48:07,818 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2020-10-13 10:48:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:07,819 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:48:07,819 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:48:07,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:48:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:48:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 10:48:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:48:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-13 10:48:07,824 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-13 10:48:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:07,825 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-13 10:48:07,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:48:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-13 10:48:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:48:07,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:07,826 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:07,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:48:07,826 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1564446065, now seen corresponding path program 43 times [2020-10-13 10:48:07,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:07,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840174806] [2020-10-13 10:48:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:09,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:09,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:48:09,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1355 [2020-10-13 10:48:09,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:48:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:48:09,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:10,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:10,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:10,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:10,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:10,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:10,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:10,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:48:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:10,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840174806] [2020-10-13 10:48:10,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:10,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:48:10,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15284476] [2020-10-13 10:48:10,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:48:10,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:48:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:48:10,872 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2020-10-13 10:48:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:12,313 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-13 10:48:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:48:12,314 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2020-10-13 10:48:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:12,315 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:48:12,315 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:48:12,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:48:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:48:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:48:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:48:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-13 10:48:12,321 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-13 10:48:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:12,321 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-13 10:48:12,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:48:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-13 10:48:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:48:12,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:12,322 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:12,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:48:12,322 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1289649022, now seen corresponding path program 44 times [2020-10-13 10:48:12,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:12,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126222926] [2020-10-13 10:48:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:12,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:13,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:13,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:48:13,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:13,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-13 10:48:13,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:13,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:48:13,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:13,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:48:13,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:15,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:15,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:15,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:15,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:15,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:15,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:15,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:15,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126222926] [2020-10-13 10:48:15,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:15,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:48:15,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057282917] [2020-10-13 10:48:15,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:48:15,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:48:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:48:15,726 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2020-10-13 10:48:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:17,199 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-13 10:48:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:48:17,200 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2020-10-13 10:48:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:17,201 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:48:17,201 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:48:17,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:48:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:48:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 10:48:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:48:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-13 10:48:17,205 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-13 10:48:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:17,206 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-13 10:48:17,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:48:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-13 10:48:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:48:17,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:17,206 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:17,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:48:17,207 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1360875281, now seen corresponding path program 45 times [2020-10-13 10:48:17,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:17,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437652855] [2020-10-13 10:48:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:19,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:19,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:48:19,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:19,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-13 10:48:19,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:48:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:48:19,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:20,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:20,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:20,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:20,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:20,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437652855] [2020-10-13 10:48:20,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:20,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:48:20,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083933075] [2020-10-13 10:48:20,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:48:20,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:48:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:48:20,896 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2020-10-13 10:48:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:22,416 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-13 10:48:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:48:22,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2020-10-13 10:48:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:22,418 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:48:22,418 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:48:22,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:48:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:48:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 10:48:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:48:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-13 10:48:22,423 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-13 10:48:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:22,424 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-13 10:48:22,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:48:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-13 10:48:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:48:22,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:22,424 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:22,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:48:22,425 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 46 times [2020-10-13 10:48:22,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:22,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843978360] [2020-10-13 10:48:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:22,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:24,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2413 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:48:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:26,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:26,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:26,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:26,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:26,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:26,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:26,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843978360] [2020-10-13 10:48:26,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:26,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:48:26,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050495534] [2020-10-13 10:48:26,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:48:26,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:48:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:48:26,767 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2020-10-13 10:48:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:28,410 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-13 10:48:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:48:28,411 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2020-10-13 10:48:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:28,412 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:48:28,412 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:48:28,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:48:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:48:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 10:48:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:48:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-13 10:48:28,416 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-13 10:48:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:28,416 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-13 10:48:28,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:48:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-13 10:48:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:48:28,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:28,417 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:28,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:48:28,418 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -997119823, now seen corresponding path program 47 times [2020-10-13 10:48:28,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:28,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983228206] [2020-10-13 10:48:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:30,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:30,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2376 [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:48:30,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:32,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:32,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:32,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:32,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:32,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:32,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:32,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:32,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:32,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:32,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983228206] [2020-10-13 10:48:32,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:32,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:48:32,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175502616] [2020-10-13 10:48:32,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:48:32,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:48:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:48:32,848 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2020-10-13 10:48:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:34,614 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-13 10:48:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:48:34,615 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2020-10-13 10:48:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:34,615 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:48:34,615 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:48:34,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:48:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:48:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 10:48:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:48:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-13 10:48:34,621 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-13 10:48:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:34,622 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-13 10:48:34,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:48:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-13 10:48:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:48:34,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:34,623 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:34,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:48:34,623 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -809482178, now seen corresponding path program 48 times [2020-10-13 10:48:34,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:34,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097584435] [2020-10-13 10:48:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:36,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:36,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:48:36,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:36,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2099 [2020-10-13 10:48:36,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:36,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:48:36,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:36,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:48:36,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:38,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:38,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:38,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:38,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:38,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097584435] [2020-10-13 10:48:38,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:38,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:48:38,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154880441] [2020-10-13 10:48:38,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:48:38,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:48:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:48:38,851 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2020-10-13 10:48:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:40,643 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-13 10:48:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:48:40,644 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2020-10-13 10:48:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:40,645 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:48:40,645 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:48:40,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:48:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:48:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 10:48:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:48:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-13 10:48:40,650 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-13 10:48:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:40,650 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-13 10:48:40,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:48:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-13 10:48:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:48:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:40,651 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:40,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:48:40,652 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 712317521, now seen corresponding path program 49 times [2020-10-13 10:48:40,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:40,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870610352] [2020-10-13 10:48:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:40,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:42,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:42,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:48:42,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:42,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2207 [2020-10-13 10:48:42,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:48:42,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:42,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:48:42,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:45,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:45,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:45,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:45,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:45,021 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 10:48:45,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870610352] [2020-10-13 10:48:45,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:45,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:48:45,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408045572] [2020-10-13 10:48:45,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:48:45,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:48:45,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:48:45,022 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2020-10-13 10:48:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:46,917 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-13 10:48:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:48:46,918 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2020-10-13 10:48:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:46,919 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:48:46,919 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:48:46,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:48:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:48:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 10:48:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:48:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-13 10:48:46,924 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-13 10:48:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:46,925 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-13 10:48:46,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:48:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-13 10:48:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:48:46,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:46,925 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:46,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:48:46,926 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:46,926 INFO L82 PathProgramCache]: Analyzing trace with hash 643467934, now seen corresponding path program 50 times [2020-10-13 10:48:46,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:46,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051226808] [2020-10-13 10:48:46,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:48,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:48:48,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:50,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:50,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:50,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:50,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:50,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:50,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:50,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:50,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051226808] [2020-10-13 10:48:50,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:50,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 10:48:50,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519158030] [2020-10-13 10:48:50,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 10:48:50,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 10:48:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:48:50,737 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2020-10-13 10:48:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:52,668 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-13 10:48:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 10:48:52,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2020-10-13 10:48:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:52,672 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:48:52,672 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:48:52,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:48:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:48:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-13 10:48:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:48:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-13 10:48:52,677 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-13 10:48:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:52,678 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-13 10:48:52,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 10:48:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-13 10:48:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:48:52,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:52,679 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:52,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:48:52,679 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1490869263, now seen corresponding path program 51 times [2020-10-13 10:48:52,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:52,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241894991] [2020-10-13 10:48:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:55,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3271 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:48:55,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:58,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:58,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:58,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:58,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:58,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:58,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:58,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:58,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:58,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241894991] [2020-10-13 10:48:58,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:58,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 10:48:58,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123809192] [2020-10-13 10:48:58,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 10:48:58,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:58,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 10:48:58,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:48:58,369 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2020-10-13 10:49:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:00,333 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-13 10:49:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 10:49:00,337 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2020-10-13 10:49:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:00,338 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:49:00,338 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:49:00,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:49:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:49:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 10:49:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:49:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-13 10:49:00,343 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-13 10:49:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:00,343 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-13 10:49:00,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 10:49:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-13 10:49:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:49:00,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:00,344 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:00,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:49:00,344 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1064154366, now seen corresponding path program 52 times [2020-10-13 10:49:00,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:00,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861300316] [2020-10-13 10:49:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:03,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:03,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:49:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2762 [2020-10-13 10:49:03,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 10:49:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:49:03,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:05,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:05,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:05,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:05,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:05,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:05,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:05,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:05,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:05,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861300316] [2020-10-13 10:49:05,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:05,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 10:49:05,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710537165] [2020-10-13 10:49:05,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 10:49:05,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 10:49:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:49:05,619 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2020-10-13 10:49:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:07,696 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-13 10:49:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:49:07,697 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2020-10-13 10:49:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:07,698 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:49:07,698 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:49:07,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:49:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:49:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 10:49:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:49:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-13 10:49:07,704 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-10-13 10:49:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:07,704 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-13 10:49:07,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 10:49:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-13 10:49:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:49:07,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:07,705 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:07,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:49:07,706 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1334491759, now seen corresponding path program 53 times [2020-10-13 10:49:07,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:07,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839955345] [2020-10-13 10:49:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:10,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:10,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2659 [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:49:10,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:12,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:12,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:12,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:12,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:12,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:12,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:12,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:12,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:12,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:12,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839955345] [2020-10-13 10:49:12,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:12,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 10:49:12,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192227399] [2020-10-13 10:49:12,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 10:49:12,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:12,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 10:49:12,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:49:12,983 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2020-10-13 10:49:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:15,105 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-13 10:49:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:49:15,106 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-10-13 10:49:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:15,108 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:49:15,108 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:49:15,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:49:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:49:15,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 10:49:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:49:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-13 10:49:15,113 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-10-13 10:49:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:15,114 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-13 10:49:15,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 10:49:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-13 10:49:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:49:15,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:15,121 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:15,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:49:15,121 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1616889694, now seen corresponding path program 54 times [2020-10-13 10:49:15,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:15,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099118849] [2020-10-13 10:49:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:15,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:18,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3127 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:49:18,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:20,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:20,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:20,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:20,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:20,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:20,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:20,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:20,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:20,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099118849] [2020-10-13 10:49:20,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:20,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 10:49:20,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934449135] [2020-10-13 10:49:20,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 10:49:20,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 10:49:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:49:20,964 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2020-10-13 10:49:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:23,275 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-13 10:49:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 10:49:23,276 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2020-10-13 10:49:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:23,276 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:49:23,277 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:49:23,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:49:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:49:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 10:49:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:49:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-13 10:49:23,282 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-10-13 10:49:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:23,282 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-13 10:49:23,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 10:49:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-13 10:49:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:49:23,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:23,283 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:23,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:49:23,283 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565775, now seen corresponding path program 55 times [2020-10-13 10:49:23,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:23,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215862251] [2020-10-13 10:49:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:25,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:49:25,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2324 [2020-10-13 10:49:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 10:49:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:49:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:28,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:28,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:28,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:28,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:28,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:28,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:28,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:28,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:28,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215862251] [2020-10-13 10:49:28,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:28,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 10:49:28,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295982336] [2020-10-13 10:49:28,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 10:49:28,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 10:49:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:49:28,379 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2020-10-13 10:49:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:30,694 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-13 10:49:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 10:49:30,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2020-10-13 10:49:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:30,696 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:49:30,696 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:49:30,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:49:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:49:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 10:49:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:49:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-13 10:49:30,701 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-10-13 10:49:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:30,701 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-13 10:49:30,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 10:49:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-13 10:49:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:49:30,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:30,702 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:30,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:49:30,702 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:30,703 INFO L82 PathProgramCache]: Analyzing trace with hash 219595198, now seen corresponding path program 56 times [2020-10-13 10:49:30,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:30,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870827651] [2020-10-13 10:49:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:30,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3564 [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:49:34,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:37,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:37,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:37,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:37,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:37,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:37,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:37,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:37,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870827651] [2020-10-13 10:49:37,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:37,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 10:49:37,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895292998] [2020-10-13 10:49:37,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 10:49:37,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 10:49:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:49:37,125 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2020-10-13 10:49:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:39,564 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-13 10:49:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 10:49:39,565 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2020-10-13 10:49:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:39,566 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:49:39,566 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:49:39,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:49:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:49:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 10:49:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:49:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-13 10:49:39,571 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-10-13 10:49:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:39,571 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-13 10:49:39,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 10:49:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-13 10:49:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:49:39,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:39,574 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:39,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:49:39,574 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1746022191, now seen corresponding path program 57 times [2020-10-13 10:49:39,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:39,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181753884] [2020-10-13 10:49:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:44,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:44,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:49:44,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:47,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:47,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:47,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:47,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:47,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:47,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:47,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181753884] [2020-10-13 10:49:47,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:47,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 10:49:47,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367702129] [2020-10-13 10:49:47,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 10:49:47,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 10:49:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:49:47,646 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2020-10-13 10:49:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:50,091 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-13 10:49:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 10:49:50,092 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2020-10-13 10:49:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:50,093 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:49:50,093 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:49:50,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:49:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:49:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 10:49:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:49:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-13 10:49:50,099 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-10-13 10:49:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:50,099 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-13 10:49:50,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 10:49:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-13 10:49:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:49:50,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:50,100 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:50,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:49:50,100 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1744348190, now seen corresponding path program 58 times [2020-10-13 10:49:50,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:50,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063920998] [2020-10-13 10:49:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:52,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2571 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:49:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:55,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:55,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:55,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:55,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:55,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:55,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:55,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:55,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063920998] [2020-10-13 10:49:55,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:55,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 10:49:55,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592299285] [2020-10-13 10:49:55,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 10:49:55,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:55,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 10:49:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:49:55,823 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2020-10-13 10:49:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:58,299 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-13 10:49:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 10:49:58,300 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2020-10-13 10:49:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:58,301 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:49:58,301 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:49:58,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:49:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:49:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 10:49:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:49:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-13 10:49:58,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-10-13 10:49:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:58,307 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-13 10:49:58,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 10:49:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-13 10:49:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:49:58,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:58,308 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:58,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:49:58,308 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1723319695, now seen corresponding path program 59 times [2020-10-13 10:49:58,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:58,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925638478] [2020-10-13 10:49:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3775 [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 10:50:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:02,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:50:02,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:05,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:05,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:05,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:05,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925638478] [2020-10-13 10:50:05,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:05,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 10:50:05,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149199529] [2020-10-13 10:50:05,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 10:50:05,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 10:50:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:50:05,269 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2020-10-13 10:50:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:07,865 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-13 10:50:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 10:50:07,866 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2020-10-13 10:50:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:07,867 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:50:07,867 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:50:07,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:50:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:50:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 10:50:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:50:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-13 10:50:07,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-10-13 10:50:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:07,873 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-13 10:50:07,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 10:50:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-13 10:50:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:50:07,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:07,874 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:07,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:50:07,875 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1846841730, now seen corresponding path program 60 times [2020-10-13 10:50:07,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:07,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69889621] [2020-10-13 10:50:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:07,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:12,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:12,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:50:12,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:50:12,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 10:50:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:50:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:16,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:16,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:16,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:16,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:16,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:16,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69889621] [2020-10-13 10:50:16,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:16,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 10:50:16,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115713138] [2020-10-13 10:50:16,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 10:50:16,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 10:50:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:50:16,107 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2020-10-13 10:50:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:18,749 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-13 10:50:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:50:18,750 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2020-10-13 10:50:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:18,751 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:50:18,751 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:50:18,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:50:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:50:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 10:50:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:50:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-13 10:50:18,757 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2020-10-13 10:50:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:18,757 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-13 10:50:18,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 10:50:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-13 10:50:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:50:18,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:18,758 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:18,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:50:18,758 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1381057519, now seen corresponding path program 61 times [2020-10-13 10:50:18,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:18,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284800799] [2020-10-13 10:50:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:18,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:23,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:23,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:50:23,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:23,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4881 [2020-10-13 10:50:23,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 10:50:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:50:23,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:26,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:26,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:26,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:26,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:26,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:26,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284800799] [2020-10-13 10:50:26,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:26,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 10:50:26,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985554681] [2020-10-13 10:50:26,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 10:50:26,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 10:50:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:50:26,995 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2020-10-13 10:50:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:29,766 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-13 10:50:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:50:29,767 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2020-10-13 10:50:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:29,768 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:50:29,768 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:50:29,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:50:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:50:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 10:50:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:50:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-13 10:50:29,774 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2020-10-13 10:50:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:29,775 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-13 10:50:29,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 10:50:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-13 10:50:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:50:29,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:29,776 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:29,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:50:29,776 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 173351134, now seen corresponding path program 62 times [2020-10-13 10:50:29,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:29,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917322084] [2020-10-13 10:50:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:29,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:34,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:34,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:50:34,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 10:50:34,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 10:50:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:50:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:38,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:38,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:38,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:38,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:38,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:38,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:38,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:38,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:38,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:38,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917322084] [2020-10-13 10:50:38,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:38,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 10:50:38,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280867537] [2020-10-13 10:50:38,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 10:50:38,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:38,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 10:50:38,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:50:38,293 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2020-10-13 10:50:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:41,138 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-13 10:50:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 10:50:41,138 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2020-10-13 10:50:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:41,139 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:50:41,139 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:50:41,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:50:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:50:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 10:50:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:50:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-13 10:50:41,147 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2020-10-13 10:50:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:41,148 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-13 10:50:41,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 10:50:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-13 10:50:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:50:41,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:41,149 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:41,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:50:41,149 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1115379121, now seen corresponding path program 63 times [2020-10-13 10:50:41,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:41,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819746478] [2020-10-13 10:50:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:41,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:46,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:46,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:50:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:50,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:50,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:50,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:50,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:50,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:50,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:50,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:50,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:50,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819746478] [2020-10-13 10:50:50,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:50,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 10:50:50,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192014993] [2020-10-13 10:50:50,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 10:50:50,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 10:50:50,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:50:50,026 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2020-10-13 10:50:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:52,934 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-13 10:50:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 10:50:52,936 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2020-10-13 10:50:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:52,937 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:50:52,937 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:50:52,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:50:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:50:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 10:50:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:50:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-13 10:50:52,943 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2020-10-13 10:50:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:52,943 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-13 10:50:52,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 10:50:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-13 10:50:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:50:52,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:52,944 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:52,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:50:52,944 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash 253475646, now seen corresponding path program 64 times [2020-10-13 10:50:52,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:52,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221322640] [2020-10-13 10:50:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking...