/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 SingleStatement --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:43:05,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:43:05,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:43:05,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:43:05,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:43:05,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:43:05,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:43:05,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:43:05,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:43:05,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:43:05,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:43:05,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:43:05,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:43:05,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:43:05,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:43:05,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:43:05,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:43:05,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:43:05,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:43:05,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:43:05,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:43:05,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:43:05,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:43:05,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:43:05,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:43:05,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:43:05,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:43:05,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:43:05,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:43:05,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:43:05,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:43:05,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:43:05,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:43:05,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:43:05,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:43:05,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:43:05,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:43:05,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:43:05,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:43:05,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:43:05,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:43:05,769 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 [2020-09-24 20:43:05,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:43:05,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:43:05,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:43:05,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:43:05,825 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:43:05,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:43:05,826 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:43:05,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:43:05,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:43:05,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:43:05,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:43:05,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:43:05,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:43:05,829 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:43:05,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:43:05,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:43:05,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:43:05,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:43:05,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:43:05,830 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:43:05,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:43:05,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:43:05,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:43:05,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:43:05,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:43:05,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:43:05,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:43:05,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:43:05,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:43:05,832 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 -> SingleStatement 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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=true; [2020-09-24 20:43:06,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:43:06,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:43:06,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:43:06,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:43:06,306 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:43:06,307 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-24 20:43:06,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e994b959/0865e80c232049cd813d9e07b0147b3d/FLAGeb4952d81 [2020-09-24 20:43:06,951 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:43:06,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-24 20:43:06,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e994b959/0865e80c232049cd813d9e07b0147b3d/FLAGeb4952d81 [2020-09-24 20:43:07,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e994b959/0865e80c232049cd813d9e07b0147b3d [2020-09-24 20:43:07,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:43:07,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:43:07,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:43:07,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:43:07,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:43:07,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07, skipping insertion in model container [2020-09-24 20:43:07,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:43:07,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:43:07,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:43:07,579 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:43:07,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:43:07,620 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:43:07,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07 WrapperNode [2020-09-24 20:43:07,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:43:07,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:43:07,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:43:07,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:43:07,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (1/1) ... [2020-09-24 20:43:07,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:43:07,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:43:07,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:43:07,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:43:07,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (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 [2020-09-24 20:43:07,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:43:07,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:43:07,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:43:07,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:43:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:43:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:43:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:43:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:43:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:43:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:43:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:43:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:43:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:43:08,129 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:43:08,129 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 20:43:08,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:43:08 BoogieIcfgContainer [2020-09-24 20:43:08,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:43:08,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:43:08,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:43:08,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:43:08,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:43:07" (1/3) ... [2020-09-24 20:43:08,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7aecbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:43:08, skipping insertion in model container [2020-09-24 20:43:08,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:07" (2/3) ... [2020-09-24 20:43:08,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7aecbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:43:08, skipping insertion in model container [2020-09-24 20:43:08,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:43:08" (3/3) ... [2020-09-24 20:43:08,146 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-24 20:43:08,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:43:08,170 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:43:08,194 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:43:08,236 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:43:08,236 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:43:08,236 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:43:08,237 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:43:08,237 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:43:08,237 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:43:08,237 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:43:08,237 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:43:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-24 20:43:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 20:43:08,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:08,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:08,273 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:08,280 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-09-24 20:43:08,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:08,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345001168] [2020-09-24 20:43:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:08,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:08,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:08,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 20:43:08,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:08,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-24 20:43:08,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:08,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:08,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:43:08,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:08,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:43:08,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:08,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:08,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:08,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:08,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:08,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:43:08,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:08,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:08,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:08,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:08,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:08,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345001168] [2020-09-24 20:43:08,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:43:08,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 20:43:08,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714562427] [2020-09-24 20:43:08,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 20:43:08,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 20:43:08,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 20:43:08,595 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-09-24 20:43:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:08,625 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-09-24 20:43:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 20:43:08,627 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-09-24 20:43:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:08,638 INFO L225 Difference]: With dead ends: 75 [2020-09-24 20:43:08,638 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 20:43:08,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 20:43:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 20:43:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-24 20:43:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-24 20:43:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-24 20:43:08,696 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-09-24 20:43:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:08,696 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-24 20:43:08,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 20:43:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-24 20:43:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 20:43:08,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:08,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:08,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:43:08,699 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-09-24 20:43:08,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:08,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888404808] [2020-09-24 20:43:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:08,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:08,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 20:43:08,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:08,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-24 20:43:08,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:43:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 20:43:08,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 20:43:08,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:08,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:08,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:08,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:08,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:08,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:08,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:43:08,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:08,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:08,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:08,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888404808] [2020-09-24 20:43:08,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:43:08,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:43:08,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120901008] [2020-09-24 20:43:08,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:43:08,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:08,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:43:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:43:08,981 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-09-24 20:43:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:09,075 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-09-24 20:43:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:43:09,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-24 20:43:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:09,077 INFO L225 Difference]: With dead ends: 67 [2020-09-24 20:43:09,077 INFO L226 Difference]: Without dead ends: 51 [2020-09-24 20:43:09,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:43:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-24 20:43:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-24 20:43:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 20:43:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-24 20:43:09,088 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-09-24 20:43:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:09,088 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-24 20:43:09,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:43:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-24 20:43:09,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 20:43:09,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:09,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:09,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:43:09,092 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-09-24 20:43:09,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:09,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796936215] [2020-09-24 20:43:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:09,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:09,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 20:43:09,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:09,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-24 20:43:09,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:43:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 20:43:09,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:09,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:09,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:09,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:09,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:09,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:43:09,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:09,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796936215] [2020-09-24 20:43:09,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:09,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:43:09,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919649027] [2020-09-24 20:43:09,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:43:09,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:09,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:43:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:43:09,464 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-09-24 20:43:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:09,641 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-24 20:43:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:43:09,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-24 20:43:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:09,644 INFO L225 Difference]: With dead ends: 88 [2020-09-24 20:43:09,644 INFO L226 Difference]: Without dead ends: 86 [2020-09-24 20:43:09,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-24 20:43:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-09-24 20:43:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 20:43:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-24 20:43:09,657 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-09-24 20:43:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:09,657 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-24 20:43:09,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:43:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-24 20:43:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 20:43:09,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:09,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:09,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:43:09,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:09,660 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-09-24 20:43:09,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:09,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109422647] [2020-09-24 20:43:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:09,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:09,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 20:43:09,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:09,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-24 20:43:09,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:43:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:43:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:43:09,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:09,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:09,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:09,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:09,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:09,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:09,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:43:09,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:09,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:09,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109422647] [2020-09-24 20:43:09,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:09,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:43:09,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690118404] [2020-09-24 20:43:09,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:43:09,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:43:09,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:43:09,866 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-09-24 20:43:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:09,977 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-09-24 20:43:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:43:09,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-24 20:43:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:09,981 INFO L225 Difference]: With dead ends: 105 [2020-09-24 20:43:09,981 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 20:43:09,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 20:43:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-09-24 20:43:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 20:43:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-24 20:43:09,994 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-09-24 20:43:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:09,995 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-24 20:43:09,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:43:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-24 20:43:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 20:43:09,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:09,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:09,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:43:09,997 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-09-24 20:43:09,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:09,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849357833] [2020-09-24 20:43:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:10,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:10,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:10,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 20:43:10,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 20:43:10,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:43:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:43:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 20:43:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:10,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:10,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:10,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:10,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:10,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:10,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:10,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:10,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849357833] [2020-09-24 20:43:10,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:10,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:43:10,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079136148] [2020-09-24 20:43:10,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:43:10,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:43:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:43:10,176 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-09-24 20:43:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:10,290 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-09-24 20:43:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:43:10,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-24 20:43:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:10,292 INFO L225 Difference]: With dead ends: 116 [2020-09-24 20:43:10,292 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 20:43:10,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 20:43:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-09-24 20:43:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 20:43:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-09-24 20:43:10,305 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-09-24 20:43:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:10,306 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-09-24 20:43:10,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:43:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-09-24 20:43:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:43:10,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:10,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:10,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:43:10,308 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-09-24 20:43:10,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:10,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686923402] [2020-09-24 20:43:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:10,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:10,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:11,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:11,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:43:11,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:11,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-24 20:43:11,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 20:43:11,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:11,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:11,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:11,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:11,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:11,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:11,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:43:11,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:11,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:11,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:11,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:11,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:11,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 20:43:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:11,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:11,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:43:11,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:11,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 20:43:11,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:43:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:43:11,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686923402] [2020-09-24 20:43:11,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:11,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:11,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268337346] [2020-09-24 20:43:11,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:11,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:11,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:11,467 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 9 states. [2020-09-24 20:43:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:11,657 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-24 20:43:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:11,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-24 20:43:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:11,660 INFO L225 Difference]: With dead ends: 129 [2020-09-24 20:43:11,660 INFO L226 Difference]: Without dead ends: 127 [2020-09-24 20:43:11,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:43:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-24 20:43:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-09-24 20:43:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-24 20:43:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-24 20:43:11,673 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 49 [2020-09-24 20:43:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:11,673 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-24 20:43:11,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-24 20:43:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 20:43:11,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:11,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:11,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:43:11,676 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1084443264, now seen corresponding path program 1 times [2020-09-24 20:43:11,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:11,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055512206] [2020-09-24 20:43:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:11,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:11,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:11,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:12,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:12,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:43:12,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:12,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-09-24 20:43:12,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:12,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:12,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:12,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:43:12,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:12,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:12,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:12,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:12,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:12,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:12,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:12,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:12,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:12,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:12,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:12,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055512206] [2020-09-24 20:43:12,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:12,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:12,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330926091] [2020-09-24 20:43:12,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:12,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:12,385 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 9 states. [2020-09-24 20:43:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:12,616 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2020-09-24 20:43:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:12,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-24 20:43:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:12,619 INFO L225 Difference]: With dead ends: 164 [2020-09-24 20:43:12,619 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 20:43:12,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:43:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 20:43:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-09-24 20:43:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-24 20:43:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-24 20:43:12,640 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 48 [2020-09-24 20:43:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:12,640 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-24 20:43:12,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-24 20:43:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 20:43:12,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:12,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:12,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:43:12,643 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1278375648, now seen corresponding path program 1 times [2020-09-24 20:43:12,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:12,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420453147] [2020-09-24 20:43:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:12,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:13,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:13,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:43:13,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:13,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-09-24 20:43:13,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:13,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:43:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:13,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:13,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:13,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:13,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:13,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:13,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:13,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:13,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:13,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420453147] [2020-09-24 20:43:13,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:13,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:13,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503644627] [2020-09-24 20:43:13,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:13,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:13,347 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 9 states. [2020-09-24 20:43:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:13,573 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-09-24 20:43:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:13,574 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-24 20:43:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:13,575 INFO L225 Difference]: With dead ends: 185 [2020-09-24 20:43:13,576 INFO L226 Difference]: Without dead ends: 183 [2020-09-24 20:43:13,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:43:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-24 20:43:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-24 20:43:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-24 20:43:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-24 20:43:13,588 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 48 [2020-09-24 20:43:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:13,589 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-24 20:43:13,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-24 20:43:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 20:43:13,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:13,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:13,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:43:13,591 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash -287517810, now seen corresponding path program 2 times [2020-09-24 20:43:13,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:13,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295760327] [2020-09-24 20:43:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:13,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:13,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:13,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:14,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:14,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:43:14,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:14,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-09-24 20:43:14,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:14,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:14,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:14,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:43:14,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:14,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:14,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:14,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:14,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:14,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:14,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:14,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295760327] [2020-09-24 20:43:14,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:14,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:14,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794369166] [2020-09-24 20:43:14,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:14,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:14,237 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 9 states. [2020-09-24 20:43:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:14,442 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-09-24 20:43:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:43:14,443 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-24 20:43:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:14,445 INFO L225 Difference]: With dead ends: 227 [2020-09-24 20:43:14,445 INFO L226 Difference]: Without dead ends: 225 [2020-09-24 20:43:14,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:43:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-24 20:43:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2020-09-24 20:43:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-24 20:43:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-09-24 20:43:14,458 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2020-09-24 20:43:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:14,459 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-09-24 20:43:14,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-09-24 20:43:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 20:43:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:14,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:14,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:43:14,461 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 942147566, now seen corresponding path program 2 times [2020-09-24 20:43:14,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:14,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758601803] [2020-09-24 20:43:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:14,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:14,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:14,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:14,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:43:14,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-09-24 20:43:14,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:43:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:15,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:15,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:15,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:15,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:15,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:15,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:15,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758601803] [2020-09-24 20:43:15,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:15,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:15,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606934905] [2020-09-24 20:43:15,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:15,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:15,065 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 9 states. [2020-09-24 20:43:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:15,248 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-09-24 20:43:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:43:15,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-24 20:43:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:15,251 INFO L225 Difference]: With dead ends: 257 [2020-09-24 20:43:15,251 INFO L226 Difference]: Without dead ends: 255 [2020-09-24 20:43:15,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:43:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-24 20:43:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2020-09-24 20:43:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-24 20:43:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-24 20:43:15,262 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 48 [2020-09-24 20:43:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:15,263 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-24 20:43:15,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-24 20:43:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 20:43:15,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:15,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:15,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 20:43:15,264 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1391225462, now seen corresponding path program 1 times [2020-09-24 20:43:15,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:15,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498996168] [2020-09-24 20:43:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:15,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:15,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:15,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:16,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:16,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 20:43:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-09-24 20:43:16,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 20:43:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 20:43:16,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:16,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:16,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:16,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:16,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:16,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:16,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:43:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:16,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:16,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:16,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:43:16,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 20:43:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:43:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:43:16,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:16,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498996168] [2020-09-24 20:43:16,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:16,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:16,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503223289] [2020-09-24 20:43:16,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:16,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:16,233 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-24 20:43:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:16,473 INFO L93 Difference]: Finished difference Result 236 states and 274 transitions. [2020-09-24 20:43:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 20:43:16,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-24 20:43:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:16,476 INFO L225 Difference]: With dead ends: 236 [2020-09-24 20:43:16,476 INFO L226 Difference]: Without dead ends: 187 [2020-09-24 20:43:16,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:43:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-24 20:43:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-09-24 20:43:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-24 20:43:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2020-09-24 20:43:16,488 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 50 [2020-09-24 20:43:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:16,488 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2020-09-24 20:43:16,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2020-09-24 20:43:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:43:16,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:16,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:16,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 20:43:16,489 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1955950980, now seen corresponding path program 1 times [2020-09-24 20:43:16,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:16,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061878361] [2020-09-24 20:43:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:16,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:17,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:17,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 20:43:17,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:17,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-09-24 20:43:17,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:43:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:43:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:17,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:17,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:17,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:17,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:17,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:17,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:43:17,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:17,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:17,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061878361] [2020-09-24 20:43:17,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:17,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:17,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293322717] [2020-09-24 20:43:17,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:17,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:17,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:17,138 INFO L87 Difference]: Start difference. First operand 187 states and 213 transitions. Second operand 9 states. [2020-09-24 20:43:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:17,275 INFO L93 Difference]: Finished difference Result 230 states and 262 transitions. [2020-09-24 20:43:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:43:17,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-24 20:43:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:17,277 INFO L225 Difference]: With dead ends: 230 [2020-09-24 20:43:17,277 INFO L226 Difference]: Without dead ends: 223 [2020-09-24 20:43:17,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:43:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-24 20:43:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 199. [2020-09-24 20:43:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-09-24 20:43:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2020-09-24 20:43:17,286 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 49 [2020-09-24 20:43:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:17,287 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2020-09-24 20:43:17,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2020-09-24 20:43:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:43:17,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:17,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:17,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 20:43:17,289 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004924, now seen corresponding path program 2 times [2020-09-24 20:43:17,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:17,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378831698] [2020-09-24 20:43:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:17,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:17,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 20:43:17,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:43:17,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-09-24 20:43:17,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:17,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:17,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:43:17,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:43:17,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:17,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:17,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:17,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:17,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:17,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:17,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:17,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:17,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:17,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:17,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378831698] [2020-09-24 20:43:17,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:17,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:43:17,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805018788] [2020-09-24 20:43:17,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:43:17,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:43:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:17,887 INFO L87 Difference]: Start difference. First operand 199 states and 229 transitions. Second operand 9 states. [2020-09-24 20:43:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:18,051 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2020-09-24 20:43:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:43:18,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-24 20:43:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:18,053 INFO L225 Difference]: With dead ends: 247 [2020-09-24 20:43:18,053 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 20:43:18,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:43:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 20:43:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2020-09-24 20:43:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-09-24 20:43:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 255 transitions. [2020-09-24 20:43:18,063 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 255 transitions. Word has length 49 [2020-09-24 20:43:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:18,064 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 255 transitions. [2020-09-24 20:43:18,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:43:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 255 transitions. [2020-09-24 20:43:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:18,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:18,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:18,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 20:43:18,065 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:18,066 INFO L82 PathProgramCache]: Analyzing trace with hash 320690707, now seen corresponding path program 3 times [2020-09-24 20:43:18,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:18,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223923361] [2020-09-24 20:43:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:18,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:20,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:20,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:20,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1959 [2020-09-24 20:43:20,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:20,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:20,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:20,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:43:20,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:20,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223923361] [2020-09-24 20:43:20,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:20,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:20,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701759556] [2020-09-24 20:43:20,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:20,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:20,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:20,203 INFO L87 Difference]: Start difference. First operand 221 states and 255 transitions. Second operand 10 states. [2020-09-24 20:43:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:20,529 INFO L93 Difference]: Finished difference Result 303 states and 349 transitions. [2020-09-24 20:43:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:43:20,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 20:43:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:20,532 INFO L225 Difference]: With dead ends: 303 [2020-09-24 20:43:20,532 INFO L226 Difference]: Without dead ends: 290 [2020-09-24 20:43:20,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:43:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-24 20:43:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 232. [2020-09-24 20:43:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-24 20:43:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 268 transitions. [2020-09-24 20:43:20,546 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 268 transitions. Word has length 59 [2020-09-24 20:43:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:20,547 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 268 transitions. [2020-09-24 20:43:20,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 268 transitions. [2020-09-24 20:43:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:20,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:20,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:20,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 20:43:20,548 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 514623091, now seen corresponding path program 1 times [2020-09-24 20:43:20,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:20,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014522439] [2020-09-24 20:43:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:22,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:22,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2248 [2020-09-24 20:43:22,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:22,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:22,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:22,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:22,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:22,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:22,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:22,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:22,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:22,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:22,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014522439] [2020-09-24 20:43:22,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:22,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:22,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741223953] [2020-09-24 20:43:22,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:22,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:22,930 INFO L87 Difference]: Start difference. First operand 232 states and 268 transitions. Second operand 11 states. [2020-09-24 20:43:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:23,188 INFO L93 Difference]: Finished difference Result 314 states and 363 transitions. [2020-09-24 20:43:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:43:23,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-24 20:43:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:23,190 INFO L225 Difference]: With dead ends: 314 [2020-09-24 20:43:23,190 INFO L226 Difference]: Without dead ends: 304 [2020-09-24 20:43:23,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:43:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-24 20:43:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2020-09-24 20:43:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-24 20:43:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2020-09-24 20:43:23,205 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 59 [2020-09-24 20:43:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:23,205 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2020-09-24 20:43:23,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2020-09-24 20:43:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:23,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:23,212 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:23,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 20:43:23,213 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash -214388301, now seen corresponding path program 2 times [2020-09-24 20:43:23,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:23,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551035111] [2020-09-24 20:43:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:25,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:25,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:25,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2204 [2020-09-24 20:43:25,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:25,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:25,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:25,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:25,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:25,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:25,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:25,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:25,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:25,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:25,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:25,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:25,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551035111] [2020-09-24 20:43:25,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:25,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:25,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671618469] [2020-09-24 20:43:25,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:25,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:25,539 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand 11 states. [2020-09-24 20:43:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:25,858 INFO L93 Difference]: Finished difference Result 383 states and 446 transitions. [2020-09-24 20:43:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:43:25,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-24 20:43:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:25,861 INFO L225 Difference]: With dead ends: 383 [2020-09-24 20:43:25,861 INFO L226 Difference]: Without dead ends: 373 [2020-09-24 20:43:25,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:43:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-09-24 20:43:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 351. [2020-09-24 20:43:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-09-24 20:43:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 409 transitions. [2020-09-24 20:43:25,881 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 409 transitions. Word has length 59 [2020-09-24 20:43:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:25,881 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 409 transitions. [2020-09-24 20:43:25,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 409 transitions. [2020-09-24 20:43:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:25,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:25,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:25,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 20:43:25,883 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash -20455917, now seen corresponding path program 3 times [2020-09-24 20:43:25,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:25,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704396959] [2020-09-24 20:43:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:25,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:27,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:27,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:27,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-09-24 20:43:27,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:27,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:27,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:27,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:27,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:27,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:27,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:27,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:27,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:27,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:27,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:27,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:27,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704396959] [2020-09-24 20:43:27,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:27,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:27,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995850156] [2020-09-24 20:43:27,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:27,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:27,994 INFO L87 Difference]: Start difference. First operand 351 states and 409 transitions. Second operand 10 states. [2020-09-24 20:43:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:28,285 INFO L93 Difference]: Finished difference Result 456 states and 530 transitions. [2020-09-24 20:43:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:43:28,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 20:43:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:28,289 INFO L225 Difference]: With dead ends: 456 [2020-09-24 20:43:28,289 INFO L226 Difference]: Without dead ends: 443 [2020-09-24 20:43:28,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:43:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-09-24 20:43:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 405. [2020-09-24 20:43:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-09-24 20:43:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 472 transitions. [2020-09-24 20:43:28,309 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 472 transitions. Word has length 59 [2020-09-24 20:43:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:28,310 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 472 transitions. [2020-09-24 20:43:28,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 472 transitions. [2020-09-24 20:43:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:28,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:28,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:28,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 20:43:28,311 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash -193250235, now seen corresponding path program 4 times [2020-09-24 20:43:28,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:28,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205246444] [2020-09-24 20:43:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:30,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:30,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:30,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1807 [2020-09-24 20:43:30,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:30,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:30,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:30,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:30,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:30,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:30,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:30,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:30,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:30,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:30,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:30,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:30,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:30,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:30,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:30,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205246444] [2020-09-24 20:43:30,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:30,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:30,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965952834] [2020-09-24 20:43:30,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:30,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:30,238 INFO L87 Difference]: Start difference. First operand 405 states and 472 transitions. Second operand 10 states. [2020-09-24 20:43:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:30,480 INFO L93 Difference]: Finished difference Result 540 states and 627 transitions. [2020-09-24 20:43:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:30,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 20:43:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:30,484 INFO L225 Difference]: With dead ends: 540 [2020-09-24 20:43:30,484 INFO L226 Difference]: Without dead ends: 530 [2020-09-24 20:43:30,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:43:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-09-24 20:43:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 426. [2020-09-24 20:43:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-09-24 20:43:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 497 transitions. [2020-09-24 20:43:30,509 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 497 transitions. Word has length 59 [2020-09-24 20:43:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:30,509 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 497 transitions. [2020-09-24 20:43:30,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 497 transitions. [2020-09-24 20:43:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:30,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:30,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 20:43:30,512 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 682149, now seen corresponding path program 3 times [2020-09-24 20:43:30,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:30,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659672933] [2020-09-24 20:43:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:32,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:32,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:32,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1823 [2020-09-24 20:43:32,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:32,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:32,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:32,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:32,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:32,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:32,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:32,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:32,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:32,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:32,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:32,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:32,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:32,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659672933] [2020-09-24 20:43:32,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:32,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:32,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032599259] [2020-09-24 20:43:32,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:32,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:32,447 INFO L87 Difference]: Start difference. First operand 426 states and 497 transitions. Second operand 11 states. [2020-09-24 20:43:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:32,774 INFO L93 Difference]: Finished difference Result 560 states and 653 transitions. [2020-09-24 20:43:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:43:32,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-24 20:43:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:32,778 INFO L225 Difference]: With dead ends: 560 [2020-09-24 20:43:32,778 INFO L226 Difference]: Without dead ends: 550 [2020-09-24 20:43:32,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:43:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-09-24 20:43:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 522. [2020-09-24 20:43:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-24 20:43:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 612 transitions. [2020-09-24 20:43:32,800 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 612 transitions. Word has length 59 [2020-09-24 20:43:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:32,800 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 612 transitions. [2020-09-24 20:43:32,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 612 transitions. [2020-09-24 20:43:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:32,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:32,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:32,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 20:43:32,802 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:32,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1565211309, now seen corresponding path program 5 times [2020-09-24 20:43:32,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:32,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481699637] [2020-09-24 20:43:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:32,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:34,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:34,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:34,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-09-24 20:43:34,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:34,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:34,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:34,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:34,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:34,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:34,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:34,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:34,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:34,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:34,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:34,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:34,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:34,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481699637] [2020-09-24 20:43:34,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:34,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:34,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889047580] [2020-09-24 20:43:34,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:34,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:34,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:34,833 INFO L87 Difference]: Start difference. First operand 522 states and 612 transitions. Second operand 10 states. [2020-09-24 20:43:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:35,088 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2020-09-24 20:43:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:43:35,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 20:43:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:35,092 INFO L225 Difference]: With dead ends: 600 [2020-09-24 20:43:35,093 INFO L226 Difference]: Without dead ends: 593 [2020-09-24 20:43:35,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:43:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-09-24 20:43:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 554. [2020-09-24 20:43:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-09-24 20:43:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 650 transitions. [2020-09-24 20:43:35,115 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 650 transitions. Word has length 59 [2020-09-24 20:43:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:35,116 INFO L479 AbstractCegarLoop]: Abstraction has 554 states and 650 transitions. [2020-09-24 20:43:35,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 650 transitions. [2020-09-24 20:43:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:35,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:35,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:35,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 20:43:35,117 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash -335545933, now seen corresponding path program 4 times [2020-09-24 20:43:35,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:35,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131249200] [2020-09-24 20:43:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1979 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:37,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:37,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:37,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:37,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:37,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:37,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131249200] [2020-09-24 20:43:37,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:37,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:37,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703868166] [2020-09-24 20:43:37,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:37,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:37,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:37,243 INFO L87 Difference]: Start difference. First operand 554 states and 650 transitions. Second operand 11 states. [2020-09-24 20:43:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:37,534 INFO L93 Difference]: Finished difference Result 706 states and 827 transitions. [2020-09-24 20:43:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:37,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-24 20:43:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:37,540 INFO L225 Difference]: With dead ends: 706 [2020-09-24 20:43:37,540 INFO L226 Difference]: Without dead ends: 699 [2020-09-24 20:43:37,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:43:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-09-24 20:43:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 639. [2020-09-24 20:43:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-09-24 20:43:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 751 transitions. [2020-09-24 20:43:37,572 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 751 transitions. Word has length 59 [2020-09-24 20:43:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:37,572 INFO L479 AbstractCegarLoop]: Abstraction has 639 states and 751 transitions. [2020-09-24 20:43:37,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 751 transitions. [2020-09-24 20:43:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:37,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:37,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:37,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 20:43:37,575 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463589, now seen corresponding path program 5 times [2020-09-24 20:43:37,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:37,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715030787] [2020-09-24 20:43:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:37,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:39,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:39,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-09-24 20:43:39,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:39,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:39,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:39,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:39,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:39,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:39,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:39,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715030787] [2020-09-24 20:43:39,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:39,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:39,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768225116] [2020-09-24 20:43:39,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:39,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:39,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:39,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:39,352 INFO L87 Difference]: Start difference. First operand 639 states and 751 transitions. Second operand 11 states. [2020-09-24 20:43:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:39,601 INFO L93 Difference]: Finished difference Result 737 states and 865 transitions. [2020-09-24 20:43:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:39,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-24 20:43:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:39,607 INFO L225 Difference]: With dead ends: 737 [2020-09-24 20:43:39,607 INFO L226 Difference]: Without dead ends: 730 [2020-09-24 20:43:39,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:43:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-24 20:43:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 705. [2020-09-24 20:43:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-09-24 20:43:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 829 transitions. [2020-09-24 20:43:39,641 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 829 transitions. Word has length 59 [2020-09-24 20:43:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:39,642 INFO L479 AbstractCegarLoop]: Abstraction has 705 states and 829 transitions. [2020-09-24 20:43:39,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 829 transitions. [2020-09-24 20:43:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:39,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:39,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:39,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 20:43:39,644 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2112571323, now seen corresponding path program 4 times [2020-09-24 20:43:39,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:39,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403030821] [2020-09-24 20:43:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:41,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:41,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1542 [2020-09-24 20:43:41,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:41,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:41,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:41,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:41,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:41,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:41,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:41,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:41,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403030821] [2020-09-24 20:43:41,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:41,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:41,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081800266] [2020-09-24 20:43:41,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:41,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:41,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:41,297 INFO L87 Difference]: Start difference. First operand 705 states and 829 transitions. Second operand 10 states. [2020-09-24 20:43:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:41,536 INFO L93 Difference]: Finished difference Result 868 states and 1017 transitions. [2020-09-24 20:43:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:41,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 20:43:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:41,540 INFO L225 Difference]: With dead ends: 868 [2020-09-24 20:43:41,541 INFO L226 Difference]: Without dead ends: 858 [2020-09-24 20:43:41,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:43:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-09-24 20:43:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 747. [2020-09-24 20:43:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-09-24 20:43:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 878 transitions. [2020-09-24 20:43:41,582 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 878 transitions. Word has length 59 [2020-09-24 20:43:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:41,582 INFO L479 AbstractCegarLoop]: Abstraction has 747 states and 878 transitions. [2020-09-24 20:43:41,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 878 transitions. [2020-09-24 20:43:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:41,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:41,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:41,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 20:43:41,585 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash 616502515, now seen corresponding path program 6 times [2020-09-24 20:43:41,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:41,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358124307] [2020-09-24 20:43:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:41,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:43,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:43,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1776 [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:43,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:43,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:43,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:43,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:43,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:43,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:43,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:43,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358124307] [2020-09-24 20:43:43,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:43,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:43,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771001672] [2020-09-24 20:43:43,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:43,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:43,477 INFO L87 Difference]: Start difference. First operand 747 states and 878 transitions. Second operand 11 states. [2020-09-24 20:43:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:43,826 INFO L93 Difference]: Finished difference Result 895 states and 1051 transitions. [2020-09-24 20:43:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 20:43:43,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-24 20:43:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:43,831 INFO L225 Difference]: With dead ends: 895 [2020-09-24 20:43:43,831 INFO L226 Difference]: Without dead ends: 885 [2020-09-24 20:43:43,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-09-24 20:43:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-09-24 20:43:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 844. [2020-09-24 20:43:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-09-24 20:43:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 993 transitions. [2020-09-24 20:43:43,882 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 993 transitions. Word has length 59 [2020-09-24 20:43:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:43,882 INFO L479 AbstractCegarLoop]: Abstraction has 844 states and 993 transitions. [2020-09-24 20:43:43,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 993 transitions. [2020-09-24 20:43:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 20:43:43,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:43,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:43,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 20:43:43,884 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1846167891, now seen corresponding path program 5 times [2020-09-24 20:43:43,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:43,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008923212] [2020-09-24 20:43:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:43,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:43,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:43,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:44,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:44,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:45,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:45,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:45,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:45,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:45,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:45,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:45,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:45,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:45,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008923212] [2020-09-24 20:43:45,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:45,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:45,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463406620] [2020-09-24 20:43:45,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:45,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:45,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:45,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:45,514 INFO L87 Difference]: Start difference. First operand 844 states and 993 transitions. Second operand 10 states. [2020-09-24 20:43:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:45,748 INFO L93 Difference]: Finished difference Result 960 states and 1125 transitions. [2020-09-24 20:43:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:43:45,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 20:43:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:45,753 INFO L225 Difference]: With dead ends: 960 [2020-09-24 20:43:45,753 INFO L226 Difference]: Without dead ends: 953 [2020-09-24 20:43:45,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:43:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-09-24 20:43:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 876. [2020-09-24 20:43:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-09-24 20:43:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1031 transitions. [2020-09-24 20:43:45,790 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1031 transitions. Word has length 59 [2020-09-24 20:43:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:45,791 INFO L479 AbstractCegarLoop]: Abstraction has 876 states and 1031 transitions. [2020-09-24 20:43:45,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1031 transitions. [2020-09-24 20:43:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 20:43:45,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:45,792 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:45,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 20:43:45,793 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1385223511, now seen corresponding path program 3 times [2020-09-24 20:43:45,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:45,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998739623] [2020-09-24 20:43:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:45,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:47,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 20:43:47,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-09-24 20:43:47,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:43:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:47,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:47,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:47,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998739623] [2020-09-24 20:43:47,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:47,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:47,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403752632] [2020-09-24 20:43:47,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:47,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:47,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:47,489 INFO L87 Difference]: Start difference. First operand 876 states and 1031 transitions. Second operand 10 states. [2020-09-24 20:43:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:47,772 INFO L93 Difference]: Finished difference Result 990 states and 1162 transitions. [2020-09-24 20:43:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:43:47,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-24 20:43:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:47,779 INFO L225 Difference]: With dead ends: 990 [2020-09-24 20:43:47,780 INFO L226 Difference]: Without dead ends: 983 [2020-09-24 20:43:47,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:43:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-09-24 20:43:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 888. [2020-09-24 20:43:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-09-24 20:43:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1047 transitions. [2020-09-24 20:43:47,856 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1047 transitions. Word has length 60 [2020-09-24 20:43:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:47,857 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1047 transitions. [2020-09-24 20:43:47,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1047 transitions. [2020-09-24 20:43:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 20:43:47,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:47,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:47,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 20:43:47,860 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 656212119, now seen corresponding path program 4 times [2020-09-24 20:43:47,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:47,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799526098] [2020-09-24 20:43:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:47,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:49,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:49,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 20:43:49,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:49,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2009 [2020-09-24 20:43:49,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:43:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:49,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:49,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:49,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:49,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:49,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:49,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:49,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:49,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:49,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799526098] [2020-09-24 20:43:49,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:49,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:49,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507681819] [2020-09-24 20:43:49,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:49,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:49,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:49,974 INFO L87 Difference]: Start difference. First operand 888 states and 1047 transitions. Second operand 10 states. [2020-09-24 20:43:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:50,187 INFO L93 Difference]: Finished difference Result 994 states and 1168 transitions. [2020-09-24 20:43:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:43:50,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-24 20:43:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:50,192 INFO L225 Difference]: With dead ends: 994 [2020-09-24 20:43:50,193 INFO L226 Difference]: Without dead ends: 987 [2020-09-24 20:43:50,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:43:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-09-24 20:43:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 921. [2020-09-24 20:43:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2020-09-24 20:43:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1087 transitions. [2020-09-24 20:43:50,225 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1087 transitions. Word has length 60 [2020-09-24 20:43:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:50,226 INFO L479 AbstractCegarLoop]: Abstraction has 921 states and 1087 transitions. [2020-09-24 20:43:50,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1087 transitions. [2020-09-24 20:43:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 20:43:50,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:50,227 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:50,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 20:43:50,228 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash 104942935, now seen corresponding path program 5 times [2020-09-24 20:43:50,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:50,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647164753] [2020-09-24 20:43:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:50,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:52,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 20:43:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:52,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647164753] [2020-09-24 20:43:52,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:52,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:43:52,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97541474] [2020-09-24 20:43:52,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:43:52,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:43:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:43:52,202 INFO L87 Difference]: Start difference. First operand 921 states and 1087 transitions. Second operand 10 states. [2020-09-24 20:43:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:52,636 INFO L93 Difference]: Finished difference Result 1051 states and 1237 transitions. [2020-09-24 20:43:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 20:43:52,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-24 20:43:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:52,644 INFO L225 Difference]: With dead ends: 1051 [2020-09-24 20:43:52,644 INFO L226 Difference]: Without dead ends: 1041 [2020-09-24 20:43:52,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:43:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2020-09-24 20:43:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 932. [2020-09-24 20:43:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-09-24 20:43:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1100 transitions. [2020-09-24 20:43:52,676 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1100 transitions. Word has length 60 [2020-09-24 20:43:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:52,677 INFO L479 AbstractCegarLoop]: Abstraction has 932 states and 1100 transitions. [2020-09-24 20:43:52,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:43:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1100 transitions. [2020-09-24 20:43:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 20:43:52,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:52,678 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:52,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 20:43:52,679 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1542070112, now seen corresponding path program 6 times [2020-09-24 20:43:52,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:52,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884583250] [2020-09-24 20:43:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:55,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 20:43:55,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 20:43:55,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2400 [2020-09-24 20:43:55,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:55,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:55,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:43:55,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 20:43:55,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:55,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:55,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:55,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:55,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:55,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:55,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884583250] [2020-09-24 20:43:55,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:55,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:55,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056968724] [2020-09-24 20:43:55,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:55,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:55,201 INFO L87 Difference]: Start difference. First operand 932 states and 1100 transitions. Second operand 11 states. [2020-09-24 20:43:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:55,771 INFO L93 Difference]: Finished difference Result 1048 states and 1233 transitions. [2020-09-24 20:43:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 20:43:55,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-09-24 20:43:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:55,778 INFO L225 Difference]: With dead ends: 1048 [2020-09-24 20:43:55,779 INFO L226 Difference]: Without dead ends: 1032 [2020-09-24 20:43:55,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-09-24 20:43:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2020-09-24 20:43:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 943. [2020-09-24 20:43:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-09-24 20:43:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1113 transitions. [2020-09-24 20:43:55,811 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1113 transitions. Word has length 70 [2020-09-24 20:43:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:55,811 INFO L479 AbstractCegarLoop]: Abstraction has 943 states and 1113 transitions. [2020-09-24 20:43:55,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1113 transitions. [2020-09-24 20:43:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 20:43:55,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:55,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:55,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 20:43:55,814 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1348137728, now seen corresponding path program 7 times [2020-09-24 20:43:55,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:55,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853940246] [2020-09-24 20:43:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:55,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking...