/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:06:52,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:06:52,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:06:52,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:06:52,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:06:52,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:06:52,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:06:52,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:06:52,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:06:52,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:06:52,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:06:52,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:06:52,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:06:52,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:06:52,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:06:52,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:06:52,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:06:52,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:06:52,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:06:52,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:06:52,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:06:52,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:06:52,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:06:52,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:06:52,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:06:52,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:06:52,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:06:52,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:06:52,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:06:52,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:06:52,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:06:52,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:06:52,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:06:52,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:06:52,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:06:52,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:06:52,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:06:52,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:06:52,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:06:52,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:06:52,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:06:52,907 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 [2020-10-29 14:06:52,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:06:52,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:06:52,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:06:52,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:06:52,970 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:06:52,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:06:52,970 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:06:52,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:06:52,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:06:52,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:06:52,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:06:52,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:06:52,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:06:52,974 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:06:52,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:06:52,975 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:06:52,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:06:52,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:06:52,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:06:52,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:06:52,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:06:52,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:06:52,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:06:52,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:06:52,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:06:52,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:06:52,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:06:52,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:06:52,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:06:52,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:06:53,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:06:53,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:06:53,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:06:53,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:06:53,469 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:06:53,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 14:06:53,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8878b877/e1253a6a07514ccaa922be9d02a74a9b/FLAG6cab82f2d [2020-10-29 14:06:54,393 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:06:54,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 14:06:54,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8878b877/e1253a6a07514ccaa922be9d02a74a9b/FLAG6cab82f2d [2020-10-29 14:06:54,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8878b877/e1253a6a07514ccaa922be9d02a74a9b [2020-10-29 14:06:54,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:06:54,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:06:54,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:06:54,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:06:54,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:06:54,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:06:54" (1/1) ... [2020-10-29 14:06:54,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4c458d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:54, skipping insertion in model container [2020-10-29 14:06:54,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:06:54" (1/1) ... [2020-10-29 14:06:54,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:06:54,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:06:56,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:06:56,043 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:06:56,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:06:56,546 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:06:56,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56 WrapperNode [2020-10-29 14:06:56,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:06:56,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:06:56,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:06:56,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:06:56,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (1/1) ... [2020-10-29 14:06:56,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:06:56,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:06:56,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:06:56,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:06:56,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (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 [2020-10-29 14:06:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:06:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:06:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:06:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:06:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:06:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:06:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:06:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:06:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:06:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:06:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 14:06:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:06:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:06:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:06:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:06:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:06:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:06:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:06:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:06:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:06:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:06:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:06:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:06:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:06:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:06:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:06:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:06:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:06:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:07:00,510 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:07:00,510 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:07:00,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:07:00 BoogieIcfgContainer [2020-10-29 14:07:00,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:07:00,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:07:00,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:07:00,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:07:00,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:06:54" (1/3) ... [2020-10-29 14:07:00,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c9e32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:07:00, skipping insertion in model container [2020-10-29 14:07:00,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:56" (2/3) ... [2020-10-29 14:07:00,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c9e32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:07:00, skipping insertion in model container [2020-10-29 14:07:00,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:07:00" (3/3) ... [2020-10-29 14:07:00,528 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 14:07:00,540 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:07:00,545 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:07:00,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:07:00,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:07:00,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:07:00,592 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:07:00,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:07:00,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:07:00,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:07:00,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:07:00,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:07:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states. [2020-10-29 14:07:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-29 14:07:00,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:00,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:00,664 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash 471360347, now seen corresponding path program 1 times [2020-10-29 14:07:00,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:00,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812272513] [2020-10-29 14:07:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:01,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:02,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:02,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:06,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:06,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-29 14:07:06,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:07:06,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 14:07:06,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:06,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-29 14:07:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-29 14:07:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 14:07:07,697 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:07:07,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:07,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:07,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:07,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 14:07:07,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:07,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:07,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:07,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:07,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:07,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:07,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812272513] [2020-10-29 14:07:07,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:07,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:07,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297237941] [2020-10-29 14:07:07,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:08,017 INFO L87 Difference]: Start difference. First operand 812 states. Second operand 4 states. [2020-10-29 14:07:08,911 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-29 14:07:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:14,916 INFO L93 Difference]: Finished difference Result 1533 states and 2691 transitions. [2020-10-29 14:07:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:14,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-29 14:07:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:14,953 INFO L225 Difference]: With dead ends: 1533 [2020-10-29 14:07:14,953 INFO L226 Difference]: Without dead ends: 1313 [2020-10-29 14:07:14,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-10-29 14:07:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1310. [2020-10-29 14:07:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-10-29 14:07:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2041 transitions. [2020-10-29 14:07:15,149 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2041 transitions. Word has length 331 [2020-10-29 14:07:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:15,156 INFO L481 AbstractCegarLoop]: Abstraction has 1310 states and 2041 transitions. [2020-10-29 14:07:15,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2041 transitions. [2020-10-29 14:07:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-29 14:07:15,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:15,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:15,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:07:15,185 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:15,186 INFO L82 PathProgramCache]: Analyzing trace with hash -834488451, now seen corresponding path program 1 times [2020-10-29 14:07:15,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:15,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714771388] [2020-10-29 14:07:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:16,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:16,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:18,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:18,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:18,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:19,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:19,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:20,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:20,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-29 14:07:20,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:07:20,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-29 14:07:20,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:20,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 14:07:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-29 14:07:20,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:21,310 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:07:21,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:21,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:21,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:21,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:21,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 14:07:21,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:21,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:21,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:21,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:21,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:21,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:21,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714771388] [2020-10-29 14:07:21,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:21,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:21,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065725322] [2020-10-29 14:07:21,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:21,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:21,586 INFO L87 Difference]: Start difference. First operand 1310 states and 2041 transitions. Second operand 4 states. [2020-10-29 14:07:22,436 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-29 14:07:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:27,797 INFO L93 Difference]: Finished difference Result 2686 states and 4216 transitions. [2020-10-29 14:07:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:27,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-29 14:07:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:27,815 INFO L225 Difference]: With dead ends: 2686 [2020-10-29 14:07:27,815 INFO L226 Difference]: Without dead ends: 2303 [2020-10-29 14:07:27,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-10-29 14:07:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2300. [2020-10-29 14:07:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-10-29 14:07:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3577 transitions. [2020-10-29 14:07:27,933 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3577 transitions. Word has length 331 [2020-10-29 14:07:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:27,934 INFO L481 AbstractCegarLoop]: Abstraction has 2300 states and 3577 transitions. [2020-10-29 14:07:27,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3577 transitions. [2020-10-29 14:07:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-29 14:07:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:27,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:27,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:07:27,944 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash -159708538, now seen corresponding path program 1 times [2020-10-29 14:07:27,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:27,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139987683] [2020-10-29 14:07:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:31,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:31,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:31,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:33,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:33,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-29 14:07:33,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:07:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 14:07:33,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:33,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 14:07:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-29 14:07:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:34,077 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:07:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:34,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:34,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:34,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:34,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 14:07:34,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:34,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:34,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:34,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139987683] [2020-10-29 14:07:34,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:34,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:34,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637387962] [2020-10-29 14:07:34,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:34,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:34,327 INFO L87 Difference]: Start difference. First operand 2300 states and 3577 transitions. Second operand 4 states. [2020-10-29 14:07:35,260 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-29 14:07:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:40,364 INFO L93 Difference]: Finished difference Result 4870 states and 7637 transitions. [2020-10-29 14:07:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:40,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-29 14:07:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:40,387 INFO L225 Difference]: With dead ends: 4870 [2020-10-29 14:07:40,387 INFO L226 Difference]: Without dead ends: 4203 [2020-10-29 14:07:40,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2020-10-29 14:07:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4200. [2020-10-29 14:07:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-10-29 14:07:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6517 transitions. [2020-10-29 14:07:40,561 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6517 transitions. Word has length 331 [2020-10-29 14:07:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:40,562 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 6517 transitions. [2020-10-29 14:07:40,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6517 transitions. [2020-10-29 14:07:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-29 14:07:40,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:40,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:40,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:07:40,576 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1289694683, now seen corresponding path program 1 times [2020-10-29 14:07:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:40,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639529368] [2020-10-29 14:07:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:41,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:42,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:42,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:43,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:43,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:43,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:44,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:45,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:45,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-29 14:07:45,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:07:45,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 14:07:45,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:45,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-29 14:07:45,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:46,828 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:07:46,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:46,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:46,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:46,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:07:46,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:46,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:46,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:47,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639529368] [2020-10-29 14:07:47,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:47,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10274967] [2020-10-29 14:07:47,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:47,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:47,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:47,228 INFO L87 Difference]: Start difference. First operand 4200 states and 6517 transitions. Second operand 5 states. [2020-10-29 14:07:55,278 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:07:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:57,644 INFO L93 Difference]: Finished difference Result 12381 states and 19182 transitions. [2020-10-29 14:07:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:07:57,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-29 14:07:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:57,685 INFO L225 Difference]: With dead ends: 12381 [2020-10-29 14:07:57,685 INFO L226 Difference]: Without dead ends: 8232 [2020-10-29 14:07:57,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:07:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2020-10-29 14:07:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8229. [2020-10-29 14:07:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-10-29 14:07:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12697 transitions. [2020-10-29 14:07:58,158 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12697 transitions. Word has length 331 [2020-10-29 14:07:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:58,159 INFO L481 AbstractCegarLoop]: Abstraction has 8229 states and 12697 transitions. [2020-10-29 14:07:58,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:07:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12697 transitions. [2020-10-29 14:07:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-29 14:07:58,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:58,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:58,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:07:58,179 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:58,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1375168706, now seen corresponding path program 1 times [2020-10-29 14:07:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:58,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668301738] [2020-10-29 14:07:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:58,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:59,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:00,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:00,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:01,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:01,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:03,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:03,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-29 14:08:03,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:08:03,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 14:08:03,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:03,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:03,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:08:03,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:08:03,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-29 14:08:03,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:08:04,241 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:08:04,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:04,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:04,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:04,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:04,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:04,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:08:04,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:04,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:04,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:04,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:04,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:04,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:08:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:08:04,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668301738] [2020-10-29 14:08:04,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:04,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:08:04,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626223438] [2020-10-29 14:08:04,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:08:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:08:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:04,507 INFO L87 Difference]: Start difference. First operand 8229 states and 12697 transitions. Second operand 5 states. [2020-10-29 14:08:12,537 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:08:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:15,016 INFO L93 Difference]: Finished difference Result 24314 states and 37466 transitions. [2020-10-29 14:08:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:15,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-29 14:08:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:15,096 INFO L225 Difference]: With dead ends: 24314 [2020-10-29 14:08:15,096 INFO L226 Difference]: Without dead ends: 16138 [2020-10-29 14:08:15,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-10-29 14:08:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16135. [2020-10-29 14:08:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16135 states. [2020-10-29 14:08:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 24745 transitions. [2020-10-29 14:08:16,078 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 24745 transitions. Word has length 333 [2020-10-29 14:08:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:16,078 INFO L481 AbstractCegarLoop]: Abstraction has 16135 states and 24745 transitions. [2020-10-29 14:08:16,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:08:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 24745 transitions. [2020-10-29 14:08:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-29 14:08:16,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:16,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:08:16,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:08:16,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash -462135368, now seen corresponding path program 1 times [2020-10-29 14:08:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:16,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42177906] [2020-10-29 14:08:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:16,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:16,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:19,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-29 14:08:21,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:08:21,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 14:08:21,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:21,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-29 14:08:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:22,049 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:08:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:22,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:22,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:22,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:22,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:22,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:08:22,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:22,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:08:22,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42177906] [2020-10-29 14:08:22,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:22,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:08:22,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638269785] [2020-10-29 14:08:22,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:08:22,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:22,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:08:22,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:22,194 INFO L87 Difference]: Start difference. First operand 16135 states and 24745 transitions. Second operand 5 states. [2020-10-29 14:08:29,679 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:08:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:32,364 INFO L93 Difference]: Finished difference Result 47529 states and 72731 transitions. [2020-10-29 14:08:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:32,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-29 14:08:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:32,442 INFO L225 Difference]: With dead ends: 47529 [2020-10-29 14:08:32,442 INFO L226 Difference]: Without dead ends: 31530 [2020-10-29 14:08:32,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31530 states. [2020-10-29 14:08:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31530 to 31527. [2020-10-29 14:08:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31527 states. [2020-10-29 14:08:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31527 states to 31527 states and 47977 transitions. [2020-10-29 14:08:34,164 INFO L78 Accepts]: Start accepts. Automaton has 31527 states and 47977 transitions. Word has length 335 [2020-10-29 14:08:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:34,165 INFO L481 AbstractCegarLoop]: Abstraction has 31527 states and 47977 transitions. [2020-10-29 14:08:34,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:08:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 31527 states and 47977 transitions. [2020-10-29 14:08:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-29 14:08:34,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:34,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:08:34,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:08:34,213 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1680119469, now seen corresponding path program 1 times [2020-10-29 14:08:34,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:34,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97782109] [2020-10-29 14:08:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:34,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:34,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:34,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:38,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:39,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:39,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-29 14:08:39,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:40,082 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:08:40,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:40,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:40,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:40,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:40,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:40,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:08:40,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:40,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:08:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:08:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97782109] [2020-10-29 14:08:40,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:40,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:08:40,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001150624] [2020-10-29 14:08:40,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:08:40,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:40,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:08:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:40,259 INFO L87 Difference]: Start difference. First operand 31527 states and 47977 transitions. Second operand 5 states. [2020-10-29 14:08:49,063 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:08:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:52,102 INFO L93 Difference]: Finished difference Result 93063 states and 141369 transitions. [2020-10-29 14:08:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:52,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-29 14:08:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:52,214 INFO L225 Difference]: With dead ends: 93063 [2020-10-29 14:08:52,214 INFO L226 Difference]: Without dead ends: 61712 [2020-10-29 14:08:52,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61712 states. [2020-10-29 14:08:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61712 to 61709. [2020-10-29 14:08:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61709 states. [2020-10-29 14:08:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61709 states to 61709 states and 93245 transitions. [2020-10-29 14:08:55,982 INFO L78 Accepts]: Start accepts. Automaton has 61709 states and 93245 transitions. Word has length 337 [2020-10-29 14:08:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:55,983 INFO L481 AbstractCegarLoop]: Abstraction has 61709 states and 93245 transitions. [2020-10-29 14:08:55,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:08:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 61709 states and 93245 transitions. [2020-10-29 14:08:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-29 14:08:56,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:56,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:08:56,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:08:56,038 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -874339977, now seen corresponding path program 1 times [2020-10-29 14:08:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:56,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573352994] [2020-10-29 14:08:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:56,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:57,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:57,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:57,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:57,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:59,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:59,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:00,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:01,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:01,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-29 14:09:01,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 14:09:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 14:09:01,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:01,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:09:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:09:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-29 14:09:01,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:02,079 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:09:02,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:09:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:02,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:02,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:02,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:09:02,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:09:02,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:09:02,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:02,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:09:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:09:02,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:09:02,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:09:02,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573352994] [2020-10-29 14:09:02,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:09:02,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:09:02,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160527601] [2020-10-29 14:09:02,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:09:02,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:09:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:09:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:02,321 INFO L87 Difference]: Start difference. First operand 61709 states and 93245 transitions. Second operand 5 states. [2020-10-29 14:09:13,867 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:09:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:09:18,569 INFO L93 Difference]: Finished difference Result 181799 states and 274154 transitions. [2020-10-29 14:09:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:09:18,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-10-29 14:09:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:09:18,865 INFO L225 Difference]: With dead ends: 181799 [2020-10-29 14:09:18,866 INFO L226 Difference]: Without dead ends: 120804 [2020-10-29 14:09:18,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:09:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120804 states. [2020-10-29 14:09:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120804 to 120801. [2020-10-29 14:09:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120801 states. [2020-10-29 14:09:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120801 states to 120801 states and 181222 transitions. [2020-10-29 14:09:26,931 INFO L78 Accepts]: Start accepts. Automaton has 120801 states and 181222 transitions. Word has length 339 [2020-10-29 14:09:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:09:26,932 INFO L481 AbstractCegarLoop]: Abstraction has 120801 states and 181222 transitions. [2020-10-29 14:09:26,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:09:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 120801 states and 181222 transitions. [2020-10-29 14:09:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-29 14:09:27,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:09:27,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:09:27,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:09:27,073 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:09:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:09:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -392602181, now seen corresponding path program 1 times [2020-10-29 14:09:27,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:09:27,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388802539] [2020-10-29 14:09:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:09:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:27,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:28,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:28,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:28,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:28,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:28,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:32,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:32,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 14:09:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-29 14:09:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:32,946 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:09:32,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:09:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:32,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:32,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:32,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:09:32,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:09:32,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:09:32,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:32,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:09:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:09:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:09:32,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:09:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388802539] [2020-10-29 14:09:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:09:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:09:33,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154389609] [2020-10-29 14:09:33,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:09:33,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:09:33,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:09:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:09:33,090 INFO L87 Difference]: Start difference. First operand 120801 states and 181222 transitions. Second operand 4 states. [2020-10-29 14:09:49,970 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-29 14:09:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:09:56,787 INFO L93 Difference]: Finished difference Result 356230 states and 533348 transitions. [2020-10-29 14:09:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:09:56,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-10-29 14:09:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:09:57,375 INFO L225 Difference]: With dead ends: 356230 [2020-10-29 14:09:57,375 INFO L226 Difference]: Without dead ends: 236243 [2020-10-29 14:09:57,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236243 states. [2020-10-29 14:10:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236243 to 236240. [2020-10-29 14:10:12,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236240 states. [2020-10-29 14:10:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236240 states to 236240 states and 351792 transitions. [2020-10-29 14:10:13,497 INFO L78 Accepts]: Start accepts. Automaton has 236240 states and 351792 transitions. Word has length 341 [2020-10-29 14:10:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:13,498 INFO L481 AbstractCegarLoop]: Abstraction has 236240 states and 351792 transitions. [2020-10-29 14:10:13,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 236240 states and 351792 transitions. [2020-10-29 14:10:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-29 14:10:14,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:14,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:14,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:10:14,092 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:14,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1271482454, now seen corresponding path program 1 times [2020-10-29 14:10:14,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:14,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422792458] [2020-10-29 14:10:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:14,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:19,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:19,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-29 14:10:19,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:10:19,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 14:10:19,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:19,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 14:10:19,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:20,050 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 14:10:20,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:20,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:20,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:20,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:20,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:20,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422792458] [2020-10-29 14:10:20,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:20,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179231981] [2020-10-29 14:10:20,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:20,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:20,265 INFO L87 Difference]: Start difference. First operand 236240 states and 351792 transitions. Second operand 5 states.