/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/Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:47:54,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:47:54,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:47:54,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:47:54,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:47:54,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:47:54,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:47:54,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:47:54,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:47:54,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:47:54,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:47:54,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:47:54,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:47:54,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:47:54,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:47:54,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:47:54,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:47:54,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:47:54,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:47:54,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:47:54,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:47:54,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:47:54,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:47:54,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:47:54,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:47:54,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:47:54,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:47:54,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:47:54,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:47:54,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:47:54,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:47:54,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:47:54,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:47:54,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:47:54,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:47:54,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:47:54,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:47:54,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:47:54,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:47:54,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:47:54,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:47:54,770 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 22:47:54,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:47:54,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:47:54,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:47:54,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:47:54,799 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:47:54,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:47:54,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:47:54,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:47:54,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:47:54,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:47:54,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:47:54,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:47:54,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:47:54,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:47:54,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:47:54,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:47:54,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:47:54,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:47:54,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:47:54,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:47:54,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:47:54,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:47:54,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:47:54,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:47:54,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:47:54,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:47:54,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:47:54,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:47:54,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:47:54,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:47:55,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:47:55,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:47:55,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:47:55,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:47:55,231 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:47:55,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label07.c [2020-10-26 22:47:55,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e881137c/6ec420a48205438aad3c17f220fe7984/FLAG8ea481df2 [2020-10-26 22:47:56,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:47:56,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label07.c [2020-10-26 22:47:56,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e881137c/6ec420a48205438aad3c17f220fe7984/FLAG8ea481df2 [2020-10-26 22:47:56,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e881137c/6ec420a48205438aad3c17f220fe7984 [2020-10-26 22:47:56,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:47:56,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:47:56,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:47:56,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:47:56,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:47:56,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:47:56" (1/1) ... [2020-10-26 22:47:56,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc355cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:56, skipping insertion in model container [2020-10-26 22:47:56,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:47:56" (1/1) ... [2020-10-26 22:47:56,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:47:57,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:47:58,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:47:58,702 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:47:59,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:47:59,366 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:47:59,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59 WrapperNode [2020-10-26 22:47:59,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:47:59,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:47:59,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:47:59,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:47:59,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (1/1) ... [2020-10-26 22:47:59,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:47:59,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:47:59,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:47:59,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:47:59,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (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 22:47:59,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:47:59,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:47:59,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:47:59,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:47:59,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:47:59,855 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:47:59,855 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:47:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:47:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:47:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:47:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:47:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:47:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:47:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:47:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:47:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:47:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:47:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:47:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:48:05,497 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:48:05,498 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:48:05,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:48:05 BoogieIcfgContainer [2020-10-26 22:48:05,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:48:05,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:48:05,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:48:05,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:48:05,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:47:56" (1/3) ... [2020-10-26 22:48:05,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128fc6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:48:05, skipping insertion in model container [2020-10-26 22:48:05,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:59" (2/3) ... [2020-10-26 22:48:05,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128fc6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:48:05, skipping insertion in model container [2020-10-26 22:48:05,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:48:05" (3/3) ... [2020-10-26 22:48:05,516 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label07.c [2020-10-26 22:48:05,530 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:48:05,538 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:48:05,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:48:05,600 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:48:05,600 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:48:05,601 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:48:05,601 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:48:05,601 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:48:05,601 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:48:05,601 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:48:05,601 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:48:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:48:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 22:48:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:05,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:05,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:05,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1299818532, now seen corresponding path program 1 times [2020-10-26 22:48:05,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:05,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467268044] [2020-10-26 22:48:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:05,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:06,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:06,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 22:48:06,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:06,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-26 22:48:06,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 22:48:06,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:48:06,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:06,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:06,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:06,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:06,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:06,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:48:06,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:06,664 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 22:48:06,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467268044] [2020-10-26 22:48:06,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:06,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:48:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205345182] [2020-10-26 22:48:06,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:48:06,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:06,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:48:06,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:48:06,699 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:48:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:19,120 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:48:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:48:19,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-26 22:48:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:19,163 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:48:19,163 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:48:19,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:48:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:48:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:48:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:48:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2522 transitions. [2020-10-26 22:48:19,423 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2522 transitions. Word has length 13 [2020-10-26 22:48:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2522 transitions. [2020-10-26 22:48:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:48:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2522 transitions. [2020-10-26 22:48:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 22:48:19,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:19,432 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:48:19,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:48:19,433 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash 847548901, now seen corresponding path program 1 times [2020-10-26 22:48:19,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:19,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916183099] [2020-10-26 22:48:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:19,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:20,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:20,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 22:48:20,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:20,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-26 22:48:20,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:48:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:48:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:48:20,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:20,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:20,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:20,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:20,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 22:48:20,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:20,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:20,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:20,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:20,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:48:20,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:20,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 22:48:20,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:20,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:20,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:20,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:48:20,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:48:20,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916183099] [2020-10-26 22:48:20,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:20,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:48:20,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702507587] [2020-10-26 22:48:20,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:48:20,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:20,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:48:20,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:48:20,970 INFO L87 Difference]: Start difference. First operand 1554 states and 2522 transitions. Second operand 6 states. [2020-10-26 22:48:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:33,844 INFO L93 Difference]: Finished difference Result 4692 states and 7653 transitions. [2020-10-26 22:48:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 22:48:33,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-26 22:48:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:33,871 INFO L225 Difference]: With dead ends: 4692 [2020-10-26 22:48:33,872 INFO L226 Difference]: Without dead ends: 3144 [2020-10-26 22:48:33,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2020-10-26 22:48:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3126. [2020-10-26 22:48:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3126 states. [2020-10-26 22:48:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 4444 transitions. [2020-10-26 22:48:33,992 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 4444 transitions. Word has length 88 [2020-10-26 22:48:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:33,993 INFO L481 AbstractCegarLoop]: Abstraction has 3126 states and 4444 transitions. [2020-10-26 22:48:33,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:48:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 4444 transitions. [2020-10-26 22:48:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 22:48:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:33,997 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:48:33,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:48:33,997 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1562839571, now seen corresponding path program 1 times [2020-10-26 22:48:33,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:33,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335020967] [2020-10-26 22:48:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:34,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:34,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:35,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:35,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:48:35,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:48:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-26 22:48:35,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:48:35,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:35,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:35,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:35,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:35,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:48:35,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:35,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:35,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:35,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:35,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:48:35,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:35,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 22:48:35,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:35,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:35,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:35,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:48:35,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:48:35,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335020967] [2020-10-26 22:48:35,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:35,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:48:35,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499747580] [2020-10-26 22:48:35,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:35,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:35,585 INFO L87 Difference]: Start difference. First operand 3126 states and 4444 transitions. Second operand 7 states. [2020-10-26 22:48:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:53,878 INFO L93 Difference]: Finished difference Result 9576 states and 13794 transitions. [2020-10-26 22:48:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:48:53,879 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-26 22:48:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:53,917 INFO L225 Difference]: With dead ends: 9576 [2020-10-26 22:48:53,917 INFO L226 Difference]: Without dead ends: 6456 [2020-10-26 22:48:53,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-10-26 22:48:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 6343. [2020-10-26 22:48:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6343 states. [2020-10-26 22:48:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 8493 transitions. [2020-10-26 22:48:54,144 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 8493 transitions. Word has length 92 [2020-10-26 22:48:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:54,145 INFO L481 AbstractCegarLoop]: Abstraction has 6343 states and 8493 transitions. [2020-10-26 22:48:54,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 8493 transitions. [2020-10-26 22:48:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 22:48:54,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:54,148 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:48:54,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:48:54,149 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash -295124943, now seen corresponding path program 1 times [2020-10-26 22:48:54,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:54,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096372152] [2020-10-26 22:48:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:54,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:54,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:55,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 22:48:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-26 22:48:55,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 22:48:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:55,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:55,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:55,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:55,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:55,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:55,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:48:55,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:55,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:55,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:55,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:55,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:56,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:56,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:48:56,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:56,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-26 22:48:56,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:56,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:56,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:56,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:48:56,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:48:56,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096372152] [2020-10-26 22:48:56,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:56,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:48:56,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091130344] [2020-10-26 22:48:56,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:56,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:56,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:56,198 INFO L87 Difference]: Start difference. First operand 6343 states and 8493 transitions. Second operand 7 states. [2020-10-26 22:49:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:15,233 INFO L93 Difference]: Finished difference Result 19684 states and 28727 transitions. [2020-10-26 22:49:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:49:15,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2020-10-26 22:49:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:15,358 INFO L225 Difference]: With dead ends: 19684 [2020-10-26 22:49:15,358 INFO L226 Difference]: Without dead ends: 13347 [2020-10-26 22:49:15,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:49:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13347 states. [2020-10-26 22:49:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13347 to 12982. [2020-10-26 22:49:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12982 states. [2020-10-26 22:49:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12982 states to 12982 states and 17264 transitions. [2020-10-26 22:49:15,871 INFO L78 Accepts]: Start accepts. Automaton has 12982 states and 17264 transitions. Word has length 126 [2020-10-26 22:49:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:15,872 INFO L481 AbstractCegarLoop]: Abstraction has 12982 states and 17264 transitions. [2020-10-26 22:49:15,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12982 states and 17264 transitions. [2020-10-26 22:49:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 22:49:15,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:15,876 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 22:49:15,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:49:15,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:15,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2128820046, now seen corresponding path program 1 times [2020-10-26 22:49:15,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:15,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525469957] [2020-10-26 22:49:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:17,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:17,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-26 22:49:17,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:17,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-26 22:49:17,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:49:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 22:49:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:17,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:17,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:17,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:17,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:17,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:49:17,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:49:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:49:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:17,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:17,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:17,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:49:17,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:17,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 22:49:17,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:49:17,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:49:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:17,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:17,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 22:49:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:17,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 22:49:17,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 22:49:17,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:49:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525469957] [2020-10-26 22:49:17,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:49:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:49:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577242822] [2020-10-26 22:49:17,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:49:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:49:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:49:17,836 INFO L87 Difference]: Start difference. First operand 12982 states and 17264 transitions. Second operand 8 states. [2020-10-26 22:49:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:46,025 INFO L93 Difference]: Finished difference Result 34877 states and 52100 transitions. [2020-10-26 22:49:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:49:46,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 188 [2020-10-26 22:49:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:46,110 INFO L225 Difference]: With dead ends: 34877 [2020-10-26 22:49:46,110 INFO L226 Difference]: Without dead ends: 18767 [2020-10-26 22:49:46,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:49:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18767 states. [2020-10-26 22:49:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18767 to 18321. [2020-10-26 22:49:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18321 states. [2020-10-26 22:49:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18321 states to 18321 states and 25142 transitions. [2020-10-26 22:49:46,703 INFO L78 Accepts]: Start accepts. Automaton has 18321 states and 25142 transitions. Word has length 188 [2020-10-26 22:49:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:46,704 INFO L481 AbstractCegarLoop]: Abstraction has 18321 states and 25142 transitions. [2020-10-26 22:49:46,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:49:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18321 states and 25142 transitions. [2020-10-26 22:49:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 22:49:46,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:46,711 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:46,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:49:46,712 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:46,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1135734493, now seen corresponding path program 1 times [2020-10-26 22:49:46,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:46,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234212162] [2020-10-26 22:49:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:46,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:49,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:49,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 22:49:49,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2348 [2020-10-26 22:49:49,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:49:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-26 22:49:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:49,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:49,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:49,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:49,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:49,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:49:49,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:49,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:49,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:49:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:49:49,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:49,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:49,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 22:49:49,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:49,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-26 22:49:49,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-26 22:49:49,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:49:50,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234212162] [2020-10-26 22:49:50,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:49:50,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:49:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260175125] [2020-10-26 22:49:50,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:50,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:50,605 INFO L87 Difference]: Start difference. First operand 18321 states and 25142 transitions. Second operand 7 states. [2020-10-26 22:49:52,570 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 22:50:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:06,467 INFO L93 Difference]: Finished difference Result 36504 states and 50937 transitions. [2020-10-26 22:50:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:50:06,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-10-26 22:50:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:06,554 INFO L225 Difference]: With dead ends: 36504 [2020-10-26 22:50:06,554 INFO L226 Difference]: Without dead ends: 18956 [2020-10-26 22:50:06,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:50:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18956 states. [2020-10-26 22:50:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18956 to 18472. [2020-10-26 22:50:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18472 states. [2020-10-26 22:50:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18472 states to 18472 states and 25318 transitions. [2020-10-26 22:50:07,120 INFO L78 Accepts]: Start accepts. Automaton has 18472 states and 25318 transitions. Word has length 212 [2020-10-26 22:50:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:07,121 INFO L481 AbstractCegarLoop]: Abstraction has 18472 states and 25318 transitions. [2020-10-26 22:50:07,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:50:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 18472 states and 25318 transitions. [2020-10-26 22:50:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-26 22:50:07,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:07,124 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 22:50:07,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:50:07,125 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash -143261832, now seen corresponding path program 1 times [2020-10-26 22:50:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:07,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920042824] [2020-10-26 22:50:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:07,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:09,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:09,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 22:50:09,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1961 [2020-10-26 22:50:09,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:50:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:50:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 22:50:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:09,413 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:50:09,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:09,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:09,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:50:09,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:09,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:09,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:09,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:09,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:09,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:09,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:09,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:50:09,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 22:50:09,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:50:09,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:09,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:50:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:09,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:09,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:09,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:50:09,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:09,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 22:50:09,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:09,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:50:09,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 75 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:10,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920042824] [2020-10-26 22:50:10,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:10,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:50:10,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352096025] [2020-10-26 22:50:10,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:50:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:50:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:50:10,006 INFO L87 Difference]: Start difference. First operand 18472 states and 25318 transitions. Second operand 6 states. [2020-10-26 22:50:10,147 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:28,385 INFO L93 Difference]: Finished difference Result 53284 states and 77211 transitions. [2020-10-26 22:50:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:50:28,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 233 [2020-10-26 22:50:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:28,525 INFO L225 Difference]: With dead ends: 53284 [2020-10-26 22:50:28,525 INFO L226 Difference]: Without dead ends: 34668 [2020-10-26 22:50:28,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:50:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34668 states. [2020-10-26 22:50:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34668 to 34571. [2020-10-26 22:50:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34571 states. [2020-10-26 22:50:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34571 states to 34571 states and 46653 transitions. [2020-10-26 22:50:29,550 INFO L78 Accepts]: Start accepts. Automaton has 34571 states and 46653 transitions. Word has length 233 [2020-10-26 22:50:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:29,551 INFO L481 AbstractCegarLoop]: Abstraction has 34571 states and 46653 transitions. [2020-10-26 22:50:29,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:50:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 34571 states and 46653 transitions. [2020-10-26 22:50:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 22:50:29,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:29,556 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 22:50:29,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:50:29,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1692717748, now seen corresponding path program 1 times [2020-10-26 22:50:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:29,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589816289] [2020-10-26 22:50:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:29,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:29,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:31,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:31,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 22:50:31,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:32,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:32,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:32,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:32,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:32,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:50:32,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:32,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:32,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:32,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:32,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:32,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:32,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:32,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:32,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:32,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-26 22:50:32,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:32,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:32,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:32,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:50:32,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:32,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:32,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:32,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:32,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:32,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:50:32,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:32,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 22:50:32,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:32,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:32,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:32,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:50:32,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589816289] [2020-10-26 22:50:32,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:32,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:50:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072233383] [2020-10-26 22:50:32,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:50:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:32,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:50:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:50:32,978 INFO L87 Difference]: Start difference. First operand 34571 states and 46653 transitions. Second operand 6 states. [2020-10-26 22:50:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:50,178 INFO L93 Difference]: Finished difference Result 85089 states and 120222 transitions. [2020-10-26 22:50:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 22:50:50,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 251 [2020-10-26 22:50:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:50,380 INFO L225 Difference]: With dead ends: 85089 [2020-10-26 22:50:50,381 INFO L226 Difference]: Without dead ends: 50476 [2020-10-26 22:50:50,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:50:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50476 states. [2020-10-26 22:50:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50476 to 50336. [2020-10-26 22:50:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50336 states. [2020-10-26 22:50:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50336 states to 50336 states and 68685 transitions. [2020-10-26 22:50:51,994 INFO L78 Accepts]: Start accepts. Automaton has 50336 states and 68685 transitions. Word has length 251 [2020-10-26 22:50:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:51,994 INFO L481 AbstractCegarLoop]: Abstraction has 50336 states and 68685 transitions. [2020-10-26 22:50:51,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:50:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50336 states and 68685 transitions. [2020-10-26 22:50:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-26 22:50:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:51,999 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 22:50:51,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:50:51,999 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1678256242, now seen corresponding path program 1 times [2020-10-26 22:50:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:52,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236499146] [2020-10-26 22:50:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:52,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:52,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:53,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-26 22:50:54,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2239 [2020-10-26 22:50:54,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:50:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:50:54,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:50:54,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:54,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 22:50:54,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:54,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:54,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:50:54,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:50:54,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 22:50:54,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:50:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:50:55,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236499146] [2020-10-26 22:50:55,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:55,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:55,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879306315] [2020-10-26 22:50:55,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:50:55,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:55,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:50:55,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:50:55,076 INFO L87 Difference]: Start difference. First operand 50336 states and 68685 transitions. Second operand 7 states. [2020-10-26 22:51:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:51:23,337 INFO L93 Difference]: Finished difference Result 123429 states and 183336 transitions. [2020-10-26 22:51:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:51:23,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2020-10-26 22:51:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:51:23,903 INFO L225 Difference]: With dead ends: 123429 [2020-10-26 22:51:23,903 INFO L226 Difference]: Without dead ends: 73093 [2020-10-26 22:51:23,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:51:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73093 states. [2020-10-26 22:51:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73093 to 71858. [2020-10-26 22:51:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71858 states. [2020-10-26 22:51:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71858 states to 71858 states and 96304 transitions. [2020-10-26 22:51:26,211 INFO L78 Accepts]: Start accepts. Automaton has 71858 states and 96304 transitions. Word has length 252 [2020-10-26 22:51:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:51:26,212 INFO L481 AbstractCegarLoop]: Abstraction has 71858 states and 96304 transitions. [2020-10-26 22:51:26,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:51:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 71858 states and 96304 transitions. [2020-10-26 22:51:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-26 22:51:26,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:51:26,218 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:51:26,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:51:26,218 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:51:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:51:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1866752396, now seen corresponding path program 1 times [2020-10-26 22:51:26,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:51:26,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035833369] [2020-10-26 22:51:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:51:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:26,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:27,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:27,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 22:51:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:27,848 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2020-10-26 22:51:28,434 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:51:28,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:51:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:28,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:28,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:51:28,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:28,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:51:28,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:28,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:28,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:28,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:28,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:28,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:51:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:28,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:28,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:51:28,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 22:51:28,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:28,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:28,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:51:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:28,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:28,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:51:28,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:28,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 22:51:28,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:28,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:51:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 22:51:28,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-26 22:51:28,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035833369] [2020-10-26 22:51:28,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:51:28,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:51:28,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848540016] [2020-10-26 22:51:28,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:51:28,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:51:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:51:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:51:28,897 INFO L87 Difference]: Start difference. First operand 71858 states and 96304 transitions. Second operand 6 states.