/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:45:16,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:45:16,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:45:16,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:45:16,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:45:16,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:45:16,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:45:16,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:45:16,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:45:16,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:45:16,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:45:16,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:45:16,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:45:16,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:45:16,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:45:16,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:45:16,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:45:16,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:45:16,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:45:16,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:45:16,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:45:16,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:45:16,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:45:16,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:45:16,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:45:16,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:45:16,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:45:16,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:45:16,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:45:16,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:45:16,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:45:16,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:45:16,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:45:16,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:45:16,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:45:16,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:45:16,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:45:16,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:45:16,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:45:16,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:45:16,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:45:16,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:45:16,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:45:16,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:45:16,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:45:16,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:45:16,866 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:45:16,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:45:16,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:45:16,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:45:16,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:45:16,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:45:16,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:45:16,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:45:16,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:45:16,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:45:16,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:45:16,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:45:16,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:45:16,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:45:16,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:45:16,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:45:16,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:45:16,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:45:16,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:45:16,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:45:16,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:45:16,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:45:16,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:45:16,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:45:16,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:45:16,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:45:17,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:45:17,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:45:17,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:45:17,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:45:17,347 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:45:17,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label26.c [2020-10-26 20:45:17,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb5cf6a3/7cbee94e678441a39ad402cb6227417e/FLAGf754edd93 [2020-10-26 20:45:18,368 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:45:18,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label26.c [2020-10-26 20:45:18,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb5cf6a3/7cbee94e678441a39ad402cb6227417e/FLAGf754edd93 [2020-10-26 20:45:18,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb5cf6a3/7cbee94e678441a39ad402cb6227417e [2020-10-26 20:45:18,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:45:18,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:45:18,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:45:18,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:45:18,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:45:18,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:18" (1/1) ... [2020-10-26 20:45:18,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ceb0f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18, skipping insertion in model container [2020-10-26 20:45:18,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:18" (1/1) ... [2020-10-26 20:45:18,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:45:18,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:45:19,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:45:19,312 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:45:19,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:45:19,553 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:45:19,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19 WrapperNode [2020-10-26 20:45:19,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:45:19,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:45:19,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:45:19,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:45:19,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... [2020-10-26 20:45:19,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:45:19,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:45:19,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:45:19,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:45:19,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:45:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:45:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:45:19,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:45:19,830 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:45:19,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:45:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:45:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:45:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:45:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:45:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:45:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:45:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:45:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:45:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:45:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:45:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:45:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:45:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:45:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:45:22,414 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:45:22,414 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:45:22,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:22 BoogieIcfgContainer [2020-10-26 20:45:22,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:45:22,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:45:22,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:45:22,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:45:22,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:45:18" (1/3) ... [2020-10-26 20:45:22,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f75b861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:22, skipping insertion in model container [2020-10-26 20:45:22,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:19" (2/3) ... [2020-10-26 20:45:22,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f75b861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:22, skipping insertion in model container [2020-10-26 20:45:22,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:22" (3/3) ... [2020-10-26 20:45:22,426 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2020-10-26 20:45:22,438 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:45:22,444 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:45:22,457 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:45:22,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:45:22,490 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:45:22,490 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:45:22,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:45:22,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:45:22,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:45:22,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:45:22,490 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:45:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:45:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 20:45:22,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:22,538 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, 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, 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, 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] [2020-10-26 20:45:22,539 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1608130892, now seen corresponding path program 1 times [2020-10-26 20:45:22,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:22,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938683016] [2020-10-26 20:45:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:23,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:27,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:27,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-26 20:45:27,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:27,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4295 [2020-10-26 20:45:27,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-26 20:45:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:45:27,995 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:28,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:28,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:28,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:28,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:28,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:28,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:45:28,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:28,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:28,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938683016] [2020-10-26 20:45:28,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:28,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:45:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927967350] [2020-10-26 20:45:28,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:45:28,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:28,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:45:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:45:28,219 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:45:28,710 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:32,571 INFO L93 Difference]: Finished difference Result 863 states and 1524 transitions. [2020-10-26 20:45:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:45:32,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-10-26 20:45:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:32,612 INFO L225 Difference]: With dead ends: 863 [2020-10-26 20:45:32,613 INFO L226 Difference]: Without dead ends: 484 [2020-10-26 20:45:32,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:45:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-26 20:45:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 466. [2020-10-26 20:45:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-26 20:45:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 744 transitions. [2020-10-26 20:45:32,775 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 744 transitions. Word has length 163 [2020-10-26 20:45:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:32,778 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 744 transitions. [2020-10-26 20:45:32,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:45:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 744 transitions. [2020-10-26 20:45:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 20:45:32,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:32,786 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2020-10-26 20:45:32,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:45:32,786 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1742190307, now seen corresponding path program 1 times [2020-10-26 20:45:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:32,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014926832] [2020-10-26 20:45:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:32,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 20:45:35,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-26 20:45:35,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:45:35,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:36,067 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:36,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:36,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:36,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:36,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:36,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:36,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:45:36,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:36,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:36,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:36,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:36,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:45:36,256 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:36,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:36,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:36,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:36,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:45:36,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:36,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 20:45:36,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:36,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:36,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:45:36,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014926832] [2020-10-26 20:45:36,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:36,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:45:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064513991] [2020-10-26 20:45:36,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:36,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:36,452 INFO L87 Difference]: Start difference. First operand 466 states and 744 transitions. Second operand 7 states. [2020-10-26 20:45:36,776 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:40,268 INFO L93 Difference]: Finished difference Result 1400 states and 2257 transitions. [2020-10-26 20:45:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:45:40,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 172 [2020-10-26 20:45:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:40,280 INFO L225 Difference]: With dead ends: 1400 [2020-10-26 20:45:40,280 INFO L226 Difference]: Without dead ends: 940 [2020-10-26 20:45:40,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:45:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-10-26 20:45:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 928. [2020-10-26 20:45:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2020-10-26 20:45:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1486 transitions. [2020-10-26 20:45:40,381 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1486 transitions. Word has length 172 [2020-10-26 20:45:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:40,382 INFO L481 AbstractCegarLoop]: Abstraction has 928 states and 1486 transitions. [2020-10-26 20:45:40,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1486 transitions. [2020-10-26 20:45:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-26 20:45:40,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:40,388 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2020-10-26 20:45:40,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:45:40,388 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash -186142553, now seen corresponding path program 1 times [2020-10-26 20:45:40,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:40,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209280448] [2020-10-26 20:45:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:40,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:40,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:44,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:44,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-26 20:45:44,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:44,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3876 [2020-10-26 20:45:44,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-26 20:45:44,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:44,733 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:44,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:44,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:44,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:44,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:44,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:45:44,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:44,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:44,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:44,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:44,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:44,924 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:44,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:44,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:44,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:44,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:44,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:44,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:44,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 20:45:44,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:44,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:44,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:44,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:44,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:45:45,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209280448] [2020-10-26 20:45:45,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:45,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:45:45,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784324686] [2020-10-26 20:45:45,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:45,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:45,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:45,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:45,163 INFO L87 Difference]: Start difference. First operand 928 states and 1486 transitions. Second operand 7 states. [2020-10-26 20:45:45,483 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:45,899 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:50,320 INFO L93 Difference]: Finished difference Result 3554 states and 5840 transitions. [2020-10-26 20:45:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:45:50,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2020-10-26 20:45:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:50,344 INFO L225 Difference]: With dead ends: 3554 [2020-10-26 20:45:50,344 INFO L226 Difference]: Without dead ends: 2632 [2020-10-26 20:45:50,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:45:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-10-26 20:45:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2624. [2020-10-26 20:45:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2624 states. [2020-10-26 20:45:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3846 transitions. [2020-10-26 20:45:50,467 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3846 transitions. Word has length 174 [2020-10-26 20:45:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:50,473 INFO L481 AbstractCegarLoop]: Abstraction has 2624 states and 3846 transitions. [2020-10-26 20:45:50,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3846 transitions. [2020-10-26 20:45:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-26 20:45:50,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:50,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2020-10-26 20:45:50,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:45:50,485 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -277261812, now seen corresponding path program 1 times [2020-10-26 20:45:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:50,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638045585] [2020-10-26 20:45:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:50,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:53,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:53,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 20:45:53,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:53,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2977 [2020-10-26 20:45:53,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:45:53,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:53,802 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:53,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:53,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:53,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:53,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:45:53,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:53,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:53,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:53,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:53,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:53,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:53,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:53,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:54,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:54,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:54,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 20:45:54,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:45:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:45:54,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:54,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:54,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:54,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:45:54,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:54,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 20:45:54,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:54,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:54,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:54,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:45:54,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:45:54,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638045585] [2020-10-26 20:45:54,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:54,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:45:54,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177494023] [2020-10-26 20:45:54,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:54,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:54,226 INFO L87 Difference]: Start difference. First operand 2624 states and 3846 transitions. Second operand 7 states. [2020-10-26 20:45:54,470 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:56,462 INFO L93 Difference]: Finished difference Result 5198 states and 7674 transitions. [2020-10-26 20:45:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:45:56,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-10-26 20:45:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:56,481 INFO L225 Difference]: With dead ends: 5198 [2020-10-26 20:45:56,482 INFO L226 Difference]: Without dead ends: 2580 [2020-10-26 20:45:56,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:45:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-10-26 20:45:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2576. [2020-10-26 20:45:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2576 states. [2020-10-26 20:45:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3698 transitions. [2020-10-26 20:45:56,589 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3698 transitions. Word has length 201 [2020-10-26 20:45:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:56,589 INFO L481 AbstractCegarLoop]: Abstraction has 2576 states and 3698 transitions. [2020-10-26 20:45:56,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3698 transitions. [2020-10-26 20:45:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 20:45:56,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:56,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:56,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:45:56,599 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 890479908, now seen corresponding path program 1 times [2020-10-26 20:45:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:56,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423180405] [2020-10-26 20:45:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:56,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:59,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:59,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 20:45:59,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:59,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3177 [2020-10-26 20:45:59,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:45:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:45:59,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,173 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:00,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:00,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:46:00,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:00,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:46:00,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:00,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:46:00,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:00,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:00,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:00,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:46:00,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 20:46:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:46:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:46:00,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423180405] [2020-10-26 20:46:00,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:00,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:46:00,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129385819] [2020-10-26 20:46:00,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:46:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:46:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:46:00,735 INFO L87 Difference]: Start difference. First operand 2576 states and 3698 transitions. Second operand 10 states. [2020-10-26 20:46:01,030 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:01,796 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 162 [2020-10-26 20:46:02,605 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 162 [2020-10-26 20:46:06,618 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2020-10-26 20:46:08,107 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 163 [2020-10-26 20:46:09,619 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:46:12,386 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2020-10-26 20:46:16,042 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:46:16,562 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:18,960 INFO L93 Difference]: Finished difference Result 17537 states and 28186 transitions. [2020-10-26 20:46:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 20:46:18,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 209 [2020-10-26 20:46:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:19,117 INFO L225 Difference]: With dead ends: 17537 [2020-10-26 20:46:19,117 INFO L226 Difference]: Without dead ends: 14967 [2020-10-26 20:46:19,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 20:46:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2020-10-26 20:46:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 14604. [2020-10-26 20:46:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14604 states. [2020-10-26 20:46:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 21479 transitions. [2020-10-26 20:46:19,836 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 21479 transitions. Word has length 209 [2020-10-26 20:46:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:19,837 INFO L481 AbstractCegarLoop]: Abstraction has 14604 states and 21479 transitions. [2020-10-26 20:46:19,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:46:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 21479 transitions. [2020-10-26 20:46:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-26 20:46:19,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:19,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2020-10-26 20:46:19,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:46:19,862 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:19,863 INFO L82 PathProgramCache]: Analyzing trace with hash 69245166, now seen corresponding path program 1 times [2020-10-26 20:46:19,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:19,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813845102] [2020-10-26 20:46:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:20,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:22,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:22,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 20:46:22,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:22,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2693 [2020-10-26 20:46:22,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:22,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:22,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:22,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:46:22,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:22,924 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:22,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:22,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:46:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:23,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:23,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:23,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:23,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:46:23,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:23,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:23,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:23,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:23,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:23,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:23,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:23,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:23,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 20:46:23,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-26 20:46:23,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 20:46:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:46:23,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813845102] [2020-10-26 20:46:23,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:23,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:23,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906128319] [2020-10-26 20:46:23,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:23,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:23,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:23,620 INFO L87 Difference]: Start difference. First operand 14604 states and 21479 transitions. Second operand 8 states. [2020-10-26 20:46:23,928 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:24,365 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:25,514 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:29,231 INFO L93 Difference]: Finished difference Result 29392 states and 43346 transitions. [2020-10-26 20:46:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:46:29,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 246 [2020-10-26 20:46:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:29,311 INFO L225 Difference]: With dead ends: 29392 [2020-10-26 20:46:29,311 INFO L226 Difference]: Without dead ends: 14798 [2020-10-26 20:46:29,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:46:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14798 states. [2020-10-26 20:46:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14798 to 13872. [2020-10-26 20:46:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13872 states. [2020-10-26 20:46:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 18321 transitions. [2020-10-26 20:46:30,010 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 18321 transitions. Word has length 246 [2020-10-26 20:46:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:30,010 INFO L481 AbstractCegarLoop]: Abstraction has 13872 states and 18321 transitions. [2020-10-26 20:46:30,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 18321 transitions. [2020-10-26 20:46:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 20:46:30,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:30,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:30,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:46:30,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:30,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1957960721, now seen corresponding path program 1 times [2020-10-26 20:46:30,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:30,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694552918] [2020-10-26 20:46:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:30,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:31,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1088 [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:31,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 20:46:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:31,472 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:31,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:31,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:31,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:31,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:31,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:46:31,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:31,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:31,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:31,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:46:31,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-26 20:46:31,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:46:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:32,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694552918] [2020-10-26 20:46:32,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:46:32,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:46:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914945956] [2020-10-26 20:46:32,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:32,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:32,510 INFO L87 Difference]: Start difference. First operand 13872 states and 18321 transitions. Second operand 7 states. [2020-10-26 20:46:32,778 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:46:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:36,328 INFO L93 Difference]: Finished difference Result 38626 states and 53043 transitions. [2020-10-26 20:46:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:46:36,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 245 [2020-10-26 20:46:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:36,448 INFO L225 Difference]: With dead ends: 38626 [2020-10-26 20:46:36,449 INFO L226 Difference]: Without dead ends: 24764 [2020-10-26 20:46:36,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24764 states. [2020-10-26 20:46:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24764 to 24508. [2020-10-26 20:46:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24508 states. [2020-10-26 20:46:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24508 states to 24508 states and 33007 transitions. [2020-10-26 20:46:37,278 INFO L78 Accepts]: Start accepts. Automaton has 24508 states and 33007 transitions. Word has length 245 [2020-10-26 20:46:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:37,278 INFO L481 AbstractCegarLoop]: Abstraction has 24508 states and 33007 transitions. [2020-10-26 20:46:37,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 24508 states and 33007 transitions. [2020-10-26 20:46:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:46:37,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:37,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:37,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:46:37,391 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1412156505, now seen corresponding path program 1 times [2020-10-26 20:46:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996604682] [2020-10-26 20:46:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:37,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:37,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:39,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:42,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:42,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 20:46:42,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:42,816 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:42,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:42,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:42,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:42,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:46:42,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:42,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:42,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:42,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:43,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:43,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:43,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:43,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:43,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 20:46:43,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:43,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:43,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:43,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:43,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:43,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:43,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:46:43,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 20:46:43,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 20:46:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:46:43,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996604682] [2020-10-26 20:46:43,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:43,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:46:43,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114206395] [2020-10-26 20:46:43,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:43,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:43,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:43,847 INFO L87 Difference]: Start difference. First operand 24508 states and 33007 transitions. Second operand 7 states. [2020-10-26 20:46:44,129 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:45,764 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:46:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:47,770 INFO L93 Difference]: Finished difference Result 54446 states and 74295 transitions. [2020-10-26 20:46:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:46:47,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 261 [2020-10-26 20:46:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:47,890 INFO L225 Difference]: With dead ends: 54446 [2020-10-26 20:46:47,890 INFO L226 Difference]: Without dead ends: 29948 [2020-10-26 20:46:47,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:46:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29948 states. [2020-10-26 20:46:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29948 to 29842. [2020-10-26 20:46:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29842 states. [2020-10-26 20:46:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29842 states to 29842 states and 40769 transitions. [2020-10-26 20:46:48,883 INFO L78 Accepts]: Start accepts. Automaton has 29842 states and 40769 transitions. Word has length 261 [2020-10-26 20:46:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:48,883 INFO L481 AbstractCegarLoop]: Abstraction has 29842 states and 40769 transitions. [2020-10-26 20:46:48,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 29842 states and 40769 transitions. [2020-10-26 20:46:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-26 20:46:48,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:48,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:48,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:46:48,918 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 956630382, now seen corresponding path program 1 times [2020-10-26 20:46:48,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:48,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730875121] [2020-10-26 20:46:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:49,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:49,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:51,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:51,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2201 [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-26 20:46:51,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:51,648 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:51,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:51,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:51,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:51,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:51,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:51,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:51,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:46:51,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:51,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:51,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:51,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:52,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:52,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:52,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:46:52,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-26 20:46:52,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:46:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 34 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:46:52,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730875121] [2020-10-26 20:46:52,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:52,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:46:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575600544] [2020-10-26 20:46:52,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:46:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:52,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:46:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:46:52,367 INFO L87 Difference]: Start difference. First operand 29842 states and 40769 transitions. Second operand 6 states. [2020-10-26 20:46:52,786 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:56,353 INFO L93 Difference]: Finished difference Result 80113 states and 114709 transitions. [2020-10-26 20:46:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:46:56,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 262 [2020-10-26 20:46:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:56,598 INFO L225 Difference]: With dead ends: 80113 [2020-10-26 20:46:56,598 INFO L226 Difference]: Without dead ends: 50281 [2020-10-26 20:46:56,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50281 states. [2020-10-26 20:46:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50281 to 48867. [2020-10-26 20:46:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48867 states. [2020-10-26 20:46:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48867 states to 48867 states and 65145 transitions. [2020-10-26 20:46:58,317 INFO L78 Accepts]: Start accepts. Automaton has 48867 states and 65145 transitions. Word has length 262 [2020-10-26 20:46:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:58,318 INFO L481 AbstractCegarLoop]: Abstraction has 48867 states and 65145 transitions. [2020-10-26 20:46:58,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:46:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 48867 states and 65145 transitions. [2020-10-26 20:46:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 20:46:58,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:58,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:58,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:46:58,363 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:58,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:58,364 INFO L82 PathProgramCache]: Analyzing trace with hash -876037386, now seen corresponding path program 1 times [2020-10-26 20:46:58,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:58,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356874447] [2020-10-26 20:46:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:59,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:59,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:46:59,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:59,753 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:59,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:59,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:59,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:59,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:46:59,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:59,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:59,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:59,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:59,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:59,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:46:59,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:59,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:59,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:00,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:00,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:00,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356874447] [2020-10-26 20:47:00,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:00,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:00,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926386182] [2020-10-26 20:47:00,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:00,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:00,342 INFO L87 Difference]: Start difference. First operand 48867 states and 65145 transitions. Second operand 7 states. [2020-10-26 20:47:00,821 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:02,063 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:47:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:06,038 INFO L93 Difference]: Finished difference Result 111360 states and 162028 transitions. [2020-10-26 20:47:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:06,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 266 [2020-10-26 20:47:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:06,518 INFO L225 Difference]: With dead ends: 111360 [2020-10-26 20:47:06,519 INFO L226 Difference]: Without dead ends: 62503 [2020-10-26 20:47:06,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62503 states. [2020-10-26 20:47:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62503 to 60160. [2020-10-26 20:47:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60160 states. [2020-10-26 20:47:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60160 states to 60160 states and 79765 transitions. [2020-10-26 20:47:08,758 INFO L78 Accepts]: Start accepts. Automaton has 60160 states and 79765 transitions. Word has length 266 [2020-10-26 20:47:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:08,759 INFO L481 AbstractCegarLoop]: Abstraction has 60160 states and 79765 transitions. [2020-10-26 20:47:08,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 60160 states and 79765 transitions. [2020-10-26 20:47:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 20:47:08,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:08,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:08,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:47:08,793 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash 245938039, now seen corresponding path program 1 times [2020-10-26 20:47:08,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:08,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778623454] [2020-10-26 20:47:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:08,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:11,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:13,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:13,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 20:47:13,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:13,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 20:47:13,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:47:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:47:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,149 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:14,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:14,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:14,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:14,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:47:14,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:47:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:47:14,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:47:14,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-26 20:47:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:47:14,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778623454] [2020-10-26 20:47:14,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:14,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770294471] [2020-10-26 20:47:14,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:14,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:14,576 INFO L87 Difference]: Start difference. First operand 60160 states and 79765 transitions. Second operand 7 states. [2020-10-26 20:47:14,905 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:17,095 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:47:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:19,754 INFO L93 Difference]: Finished difference Result 150654 states and 201379 transitions. [2020-10-26 20:47:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:19,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-10-26 20:47:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:19,999 INFO L225 Difference]: With dead ends: 150654 [2020-10-26 20:47:19,999 INFO L226 Difference]: Without dead ends: 93325 [2020-10-26 20:47:20,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93325 states. [2020-10-26 20:47:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93325 to 92991. [2020-10-26 20:47:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92991 states. [2020-10-26 20:47:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92991 states to 92991 states and 123097 transitions. [2020-10-26 20:47:23,841 INFO L78 Accepts]: Start accepts. Automaton has 92991 states and 123097 transitions. Word has length 273 [2020-10-26 20:47:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:23,841 INFO L481 AbstractCegarLoop]: Abstraction has 92991 states and 123097 transitions. [2020-10-26 20:47:23,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 92991 states and 123097 transitions. [2020-10-26 20:47:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-26 20:47:23,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:23,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:23,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:47:23,897 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2123227491, now seen corresponding path program 1 times [2020-10-26 20:47:23,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:23,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981634333] [2020-10-26 20:47:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:25,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:25,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-26 20:47:25,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:47:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2008 [2020-10-26 20:47:25,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:47:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,312 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:26,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:26,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:26,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:47:26,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:26,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:26,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:26,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:47:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 20:47:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:26,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-26 20:47:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981634333] [2020-10-26 20:47:26,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:26,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:47:26,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771618255] [2020-10-26 20:47:26,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:26,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:26,922 INFO L87 Difference]: Start difference. First operand 92991 states and 123097 transitions. Second operand 7 states. [2020-10-26 20:47:27,181 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:29,070 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:47:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:32,557 INFO L93 Difference]: Finished difference Result 204533 states and 270431 transitions. [2020-10-26 20:47:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:32,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2020-10-26 20:47:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:32,901 INFO L225 Difference]: With dead ends: 204533 [2020-10-26 20:47:32,901 INFO L226 Difference]: Without dead ends: 111552 [2020-10-26 20:47:32,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111552 states. [2020-10-26 20:47:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111552 to 111313. [2020-10-26 20:47:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111313 states. [2020-10-26 20:47:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111313 states to 111313 states and 145971 transitions. [2020-10-26 20:47:36,866 INFO L78 Accepts]: Start accepts. Automaton has 111313 states and 145971 transitions. Word has length 279 [2020-10-26 20:47:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:36,867 INFO L481 AbstractCegarLoop]: Abstraction has 111313 states and 145971 transitions. [2020-10-26 20:47:36,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 111313 states and 145971 transitions. [2020-10-26 20:47:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 20:47:36,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:36,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:36,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:47:36,970 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:36,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1886475890, now seen corresponding path program 1 times [2020-10-26 20:47:36,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:36,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154470935] [2020-10-26 20:47:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:37,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:37,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:37,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-26 20:47:37,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:37,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-26 20:47:37,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:37,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:37,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:47:37,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:47:37,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:38,147 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:38,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:38,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:38,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:38,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:38,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:38,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:47:38,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:38,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:38,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:38,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:38,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:38,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:47:38,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:38,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:47:38,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:38,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:47:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:38,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:38,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:38,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154470935] [2020-10-26 20:47:38,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:38,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:38,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317005909] [2020-10-26 20:47:38,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:38,981 INFO L87 Difference]: Start difference. First operand 111313 states and 145971 transitions. Second operand 7 states. [2020-10-26 20:47:39,371 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:47:39,807 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:49,650 INFO L93 Difference]: Finished difference Result 268913 states and 381695 transitions. [2020-10-26 20:47:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:49,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 280 [2020-10-26 20:47:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:50,672 INFO L225 Difference]: With dead ends: 268913 [2020-10-26 20:47:50,673 INFO L226 Difference]: Without dead ends: 158022 [2020-10-26 20:47:50,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158022 states. [2020-10-26 20:47:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158022 to 154192. [2020-10-26 20:47:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154192 states. [2020-10-26 20:47:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154192 states to 154192 states and 197550 transitions. [2020-10-26 20:47:56,150 INFO L78 Accepts]: Start accepts. Automaton has 154192 states and 197550 transitions. Word has length 280 [2020-10-26 20:47:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:56,151 INFO L481 AbstractCegarLoop]: Abstraction has 154192 states and 197550 transitions. [2020-10-26 20:47:56,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 154192 states and 197550 transitions. [2020-10-26 20:47:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-26 20:47:56,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:56,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:56,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:47:56,207 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash -6132949, now seen corresponding path program 1 times [2020-10-26 20:47:56,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:56,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952537244] [2020-10-26 20:47:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:56,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:56,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:59,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:59,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-26 20:47:59,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:47:59,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3013 [2020-10-26 20:47:59,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:47:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:47:59,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:59,542 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:59,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:59,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:59,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:59,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:47:59,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:59,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:59,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:59,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:59,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:59,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:47:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:59,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 20:47:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:59,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:59,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 114 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:48:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952537244] [2020-10-26 20:48:00,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:00,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:00,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242054631] [2020-10-26 20:48:00,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:00,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:00,088 INFO L87 Difference]: Start difference. First operand 154192 states and 197550 transitions. Second operand 7 states. [2020-10-26 20:48:00,372 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:02,091 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:48:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:07,263 INFO L93 Difference]: Finished difference Result 364984 states and 470173 transitions. [2020-10-26 20:48:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:48:07,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 283 [2020-10-26 20:48:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:08,351 INFO L225 Difference]: With dead ends: 364984 [2020-10-26 20:48:08,351 INFO L226 Difference]: Without dead ends: 216721 [2020-10-26 20:48:08,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:48:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216721 states. [2020-10-26 20:48:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216721 to 216266. [2020-10-26 20:48:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216266 states. [2020-10-26 20:48:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216266 states to 216266 states and 275491 transitions. [2020-10-26 20:48:14,439 INFO L78 Accepts]: Start accepts. Automaton has 216266 states and 275491 transitions. Word has length 283 [2020-10-26 20:48:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:14,440 INFO L481 AbstractCegarLoop]: Abstraction has 216266 states and 275491 transitions. [2020-10-26 20:48:14,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 216266 states and 275491 transitions. [2020-10-26 20:48:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-26 20:48:14,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:14,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:14,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:48:14,517 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash -423102542, now seen corresponding path program 1 times [2020-10-26 20:48:14,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:14,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350809326] [2020-10-26 20:48:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:14,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:15,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:17,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2800 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:48:17,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:17,646 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:17,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:17,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:17,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:17,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:17,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:48:17,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:17,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:17,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:17,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:17,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:17,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:48:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:17,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:48:17,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:18,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:48:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:18,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:18,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 121 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:48:18,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350809326] [2020-10-26 20:48:18,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:18,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:48:18,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969567954] [2020-10-26 20:48:18,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:48:18,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:48:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:48:18,345 INFO L87 Difference]: Start difference. First operand 216266 states and 275491 transitions. Second operand 8 states. [2020-10-26 20:48:18,635 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:20,893 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:48:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:28,645 INFO L93 Difference]: Finished difference Result 473215 states and 614860 transitions. [2020-10-26 20:48:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:48:28,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 288 [2020-10-26 20:48:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:30,207 INFO L225 Difference]: With dead ends: 473215 [2020-10-26 20:48:30,207 INFO L226 Difference]: Without dead ends: 258862 [2020-10-26 20:48:30,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:48:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258862 states.