/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec2_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:15:14,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:15:14,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:15:14,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:15:14,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:15:14,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:15:14,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:15:14,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:15:14,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:15:14,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:15:14,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:15:14,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:15:14,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:15:14,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:15:14,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:15:14,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:15:14,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:15:14,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:15:14,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:15:14,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:15:14,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:15:14,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:15:14,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:15:14,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:15:14,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:15:14,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:15:14,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:15:14,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:15:14,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:15:14,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:15:14,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:15:14,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:15:14,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:15:14,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:15:14,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:15:14,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:15:14,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:15:14,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:15:14,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:15:14,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:15:14,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:15:14,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:15:14,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:15:14,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:15:14,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:15:14,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:15:14,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:15:14,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:15:14,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:15:14,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:15:14,756 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:15:14,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:15:14,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:15:14,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:15:14,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:15:14,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:15:14,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:15:14,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:15:14,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:15:14,758 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:15:14,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:15:14,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:15:14,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:15:14,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:15:14,946 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:15:14,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product19.cil.c [2022-01-10 06:15:14,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b926c7008/547f912c27004406b749f674e9b9e5b0/FLAG8e1d888d4 [2022-01-10 06:15:15,517 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:15:15,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product19.cil.c [2022-01-10 06:15:15,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b926c7008/547f912c27004406b749f674e9b9e5b0/FLAG8e1d888d4 [2022-01-10 06:15:16,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b926c7008/547f912c27004406b749f674e9b9e5b0 [2022-01-10 06:15:16,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:15:16,024 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:15:16,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:15:16,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:15:16,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:15:16,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b74e28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16, skipping insertion in model container [2022-01-10 06:15:16,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:15:16,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:15:16,336 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product19.cil.c[34453,34466] [2022-01-10 06:15:16,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:15:16,461 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:15:16,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:15:16,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product19.cil.c[34453,34466] [2022-01-10 06:15:16,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:15:16,535 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:15:16,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product19.cil.c[34453,34466] [2022-01-10 06:15:16,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:15:16,629 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:15:16,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16 WrapperNode [2022-01-10 06:15:16,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:15:16,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:15:16,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:15:16,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:15:16,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,698 INFO L137 Inliner]: procedures = 96, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1059 [2022-01-10 06:15:16,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:15:16,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:15:16,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:15:16,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:15:16,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:15:16,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:15:16,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:15:16,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:15:16,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (1/1) ... [2022-01-10 06:15:16,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:15:16,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:15:16,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:15:16,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:15:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:15:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-01-10 06:15:16,850 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-01-10 06:15:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:15:16,853 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:15:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-01-10 06:15:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:15:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-01-10 06:15:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:15:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:15:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:15:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:15:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-01-10 06:15:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-01-10 06:15:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:15:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:15:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:15:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-01-10 06:15:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-01-10 06:15:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:15:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:15:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:15:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:15:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:15:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:15:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:15:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:15:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:15:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:15:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:15:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:15:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:15:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:15:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:15:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:15:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:15:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:15:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:15:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:15:16,986 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:15:16,987 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:15:17,714 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:15:17,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:15:17,727 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:15:17,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:15:17 BoogieIcfgContainer [2022-01-10 06:15:17,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:15:17,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:15:17,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:15:17,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:15:17,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:15:16" (1/3) ... [2022-01-10 06:15:17,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358a6929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:15:17, skipping insertion in model container [2022-01-10 06:15:17,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:15:16" (2/3) ... [2022-01-10 06:15:17,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358a6929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:15:17, skipping insertion in model container [2022-01-10 06:15:17,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:15:17" (3/3) ... [2022-01-10 06:15:17,736 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product19.cil.c [2022-01-10 06:15:17,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:15:17,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:15:17,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:15:17,779 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:15:17,780 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:15:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 560 states, 438 states have (on average 1.6894977168949772) internal successors, (740), 459 states have internal predecessors, (740), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-10 06:15:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:15:17,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:17,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:17,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1065418536, now seen corresponding path program 1 times [2022-01-10 06:15:17,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:17,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624633075] [2022-01-10 06:15:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:17,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:17,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:17,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:17,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:15:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:15:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:18,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:18,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624633075] [2022-01-10 06:15:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624633075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:18,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:18,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:15:18,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46847441] [2022-01-10 06:15:18,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:18,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:15:18,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:15:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:15:18,320 INFO L87 Difference]: Start difference. First operand has 560 states, 438 states have (on average 1.6894977168949772) internal successors, (740), 459 states have internal predecessors, (740), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:15:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:18,383 INFO L93 Difference]: Finished difference Result 581 states and 962 transitions. [2022-01-10 06:15:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:15:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 102 [2022-01-10 06:15:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:18,415 INFO L225 Difference]: With dead ends: 581 [2022-01-10 06:15:18,416 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:15:18,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:15:18,421 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:18,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:15:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:15:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 432 states have (on average 1.6875) internal successors, (729), 451 states have internal predecessors, (729), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 916 transitions. [2022-01-10 06:15:18,530 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 916 transitions. Word has length 102 [2022-01-10 06:15:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:18,531 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 916 transitions. [2022-01-10 06:15:18,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:15:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 916 transitions. [2022-01-10 06:15:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:15:18,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:18,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:18,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:18,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:18,750 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 782779500, now seen corresponding path program 1 times [2022-01-10 06:15:18,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29157891] [2022-01-10 06:15:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:18,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:18,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:18,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:15:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:19,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:19,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29157891] [2022-01-10 06:15:19,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29157891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:19,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:19,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:19,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374583997] [2022-01-10 06:15:19,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:19,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:19,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:19,222 INFO L87 Difference]: Start difference. First operand 552 states and 916 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:19,297 INFO L93 Difference]: Finished difference Result 1086 states and 1808 transitions. [2022-01-10 06:15:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2022-01-10 06:15:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:19,302 INFO L225 Difference]: With dead ends: 1086 [2022-01-10 06:15:19,302 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:15:19,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:19,310 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 14 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:19,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2704 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:15:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:15:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 432 states have (on average 1.6851851851851851) internal successors, (728), 451 states have internal predecessors, (728), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 915 transitions. [2022-01-10 06:15:19,347 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 915 transitions. Word has length 104 [2022-01-10 06:15:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:19,347 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 915 transitions. [2022-01-10 06:15:19,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 915 transitions. [2022-01-10 06:15:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:15:19,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:19,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:19,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:19,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:19,564 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1233827054, now seen corresponding path program 1 times [2022-01-10 06:15:19,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694782005] [2022-01-10 06:15:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:19,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:19,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:19,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:15:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:19,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:19,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694782005] [2022-01-10 06:15:19,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694782005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:19,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:19,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:19,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783742511] [2022-01-10 06:15:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:19,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:19,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:19,918 INFO L87 Difference]: Start difference. First operand 552 states and 915 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:19,965 INFO L93 Difference]: Finished difference Result 1086 states and 1807 transitions. [2022-01-10 06:15:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 105 [2022-01-10 06:15:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:19,969 INFO L225 Difference]: With dead ends: 1086 [2022-01-10 06:15:19,969 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:15:19,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:19,973 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 12 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:19,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2704 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:15:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:15:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 432 states have (on average 1.6828703703703705) internal successors, (727), 451 states have internal predecessors, (727), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 914 transitions. [2022-01-10 06:15:20,000 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 914 transitions. Word has length 105 [2022-01-10 06:15:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:20,001 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 914 transitions. [2022-01-10 06:15:20,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 914 transitions. [2022-01-10 06:15:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 06:15:20,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:20,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:20,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:20,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash 618878632, now seen corresponding path program 1 times [2022-01-10 06:15:20,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:20,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130452732] [2022-01-10 06:15:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:20,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:20,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:20,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:15:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:20,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:20,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130452732] [2022-01-10 06:15:20,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130452732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:20,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:20,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:20,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429690697] [2022-01-10 06:15:20,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:20,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:20,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:20,611 INFO L87 Difference]: Start difference. First operand 552 states and 914 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:20,644 INFO L93 Difference]: Finished difference Result 1086 states and 1806 transitions. [2022-01-10 06:15:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 106 [2022-01-10 06:15:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:20,647 INFO L225 Difference]: With dead ends: 1086 [2022-01-10 06:15:20,647 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:15:20,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:20,649 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 10 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:20,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2704 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:15:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:15:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 432 states have (on average 1.6805555555555556) internal successors, (726), 451 states have internal predecessors, (726), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 913 transitions. [2022-01-10 06:15:20,661 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 913 transitions. Word has length 106 [2022-01-10 06:15:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:20,662 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 913 transitions. [2022-01-10 06:15:20,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 913 transitions. [2022-01-10 06:15:20,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 06:15:20,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:20,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:20,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:20,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2133787826, now seen corresponding path program 1 times [2022-01-10 06:15:20,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:20,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107951398] [2022-01-10 06:15:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:20,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:20,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:20,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:15:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:21,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:21,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:21,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107951398] [2022-01-10 06:15:21,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107951398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:21,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:21,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:21,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289157774] [2022-01-10 06:15:21,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:21,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:21,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:21,271 INFO L87 Difference]: Start difference. First operand 552 states and 913 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:21,304 INFO L93 Difference]: Finished difference Result 1086 states and 1805 transitions. [2022-01-10 06:15:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 107 [2022-01-10 06:15:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:21,307 INFO L225 Difference]: With dead ends: 1086 [2022-01-10 06:15:21,308 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:15:21,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:21,311 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 8 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:21,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2704 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:15:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:15:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 432 states have (on average 1.6782407407407407) internal successors, (725), 451 states have internal predecessors, (725), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 912 transitions. [2022-01-10 06:15:21,325 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 912 transitions. Word has length 107 [2022-01-10 06:15:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:21,325 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 912 transitions. [2022-01-10 06:15:21,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 912 transitions. [2022-01-10 06:15:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:15:21,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:21,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:21,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:21,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:21,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1624102684, now seen corresponding path program 1 times [2022-01-10 06:15:21,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002758411] [2022-01-10 06:15:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:21,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:21,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:21,555 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:21,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:15:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:21,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:21,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002758411] [2022-01-10 06:15:21,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002758411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:21,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:21,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:21,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907199173] [2022-01-10 06:15:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:21,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:21,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:21,926 INFO L87 Difference]: Start difference. First operand 552 states and 912 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:21,969 INFO L93 Difference]: Finished difference Result 1086 states and 1804 transitions. [2022-01-10 06:15:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:21,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 108 [2022-01-10 06:15:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:21,972 INFO L225 Difference]: With dead ends: 1086 [2022-01-10 06:15:21,972 INFO L226 Difference]: Without dead ends: 552 [2022-01-10 06:15:21,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:21,977 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 6 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:21,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2704 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-10 06:15:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-10 06:15:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 432 states have (on average 1.6759259259259258) internal successors, (724), 451 states have internal predecessors, (724), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 911 transitions. [2022-01-10 06:15:21,990 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 911 transitions. Word has length 108 [2022-01-10 06:15:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:21,990 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 911 transitions. [2022-01-10 06:15:21,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 911 transitions. [2022-01-10 06:15:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:15:21,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:21,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:22,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:22,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:22,208 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1234234250, now seen corresponding path program 1 times [2022-01-10 06:15:22,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981064678] [2022-01-10 06:15:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:22,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:22,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:22,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:15:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:15:22,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:22,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:22,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:22,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981064678] [2022-01-10 06:15:22,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981064678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:22,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:22,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:22,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323944356] [2022-01-10 06:15:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:22,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:22,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:22,604 INFO L87 Difference]: Start difference. First operand 552 states and 911 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:22,689 INFO L93 Difference]: Finished difference Result 1052 states and 1736 transitions. [2022-01-10 06:15:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 109 [2022-01-10 06:15:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:22,696 INFO L225 Difference]: With dead ends: 1052 [2022-01-10 06:15:22,696 INFO L226 Difference]: Without dead ends: 567 [2022-01-10 06:15:22,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:22,698 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 117 mSDsluCounter, 4408 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5308 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:22,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5308 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-10 06:15:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2022-01-10 06:15:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6719457013574661) internal successors, (739), 463 states have internal predecessors, (739), 97 states have call successors, (97), 24 states have call predecessors, (97), 25 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2022-01-10 06:15:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 930 transitions. [2022-01-10 06:15:22,714 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 930 transitions. Word has length 109 [2022-01-10 06:15:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:22,715 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 930 transitions. [2022-01-10 06:15:22,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 930 transitions. [2022-01-10 06:15:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:15:22,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:22,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:22,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:22,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:22,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1219984105, now seen corresponding path program 1 times [2022-01-10 06:15:22,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:22,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391200854] [2022-01-10 06:15:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:22,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:22,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:22,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:22,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:15:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:23,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:23,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391200854] [2022-01-10 06:15:23,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391200854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:23,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:23,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:23,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090999446] [2022-01-10 06:15:23,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:23,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:23,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:23,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:23,341 INFO L87 Difference]: Start difference. First operand 565 states and 930 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:23,377 INFO L93 Difference]: Finished difference Result 1104 states and 1830 transitions. [2022-01-10 06:15:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 109 [2022-01-10 06:15:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:23,380 INFO L225 Difference]: With dead ends: 1104 [2022-01-10 06:15:23,381 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:15:23,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:23,382 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 3 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:23,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2705 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:15:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:15:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 426 states have (on average 1.6666666666666667) internal successors, (710), 445 states have internal predecessors, (710), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 897 transitions. [2022-01-10 06:15:23,396 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 897 transitions. Word has length 109 [2022-01-10 06:15:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:23,396 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 897 transitions. [2022-01-10 06:15:23,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 897 transitions. [2022-01-10 06:15:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:15:23,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:23,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:23,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:23,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:23,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1967885915, now seen corresponding path program 1 times [2022-01-10 06:15:23,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:23,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622527645] [2022-01-10 06:15:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:23,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:23,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:23,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:15:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:23,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:23,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622527645] [2022-01-10 06:15:23,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622527645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:23,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:23,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:23,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681086861] [2022-01-10 06:15:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:23,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:23,982 INFO L87 Difference]: Start difference. First operand 546 states and 897 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:24,073 INFO L93 Difference]: Finished difference Result 1040 states and 1714 transitions. [2022-01-10 06:15:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 110 [2022-01-10 06:15:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:24,076 INFO L225 Difference]: With dead ends: 1040 [2022-01-10 06:15:24,076 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:15:24,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:24,078 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 90 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:24,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 2518 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:15:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:15:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 426 states have (on average 1.6572769953051643) internal successors, (706), 445 states have internal predecessors, (706), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 893 transitions. [2022-01-10 06:15:24,113 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 893 transitions. Word has length 110 [2022-01-10 06:15:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:24,113 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 893 transitions. [2022-01-10 06:15:24,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 893 transitions. [2022-01-10 06:15:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:15:24,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:24,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:24,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:24,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:24,327 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1433198963, now seen corresponding path program 1 times [2022-01-10 06:15:24,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:24,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080217595] [2022-01-10 06:15:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:24,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:24,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:24,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:15:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:24,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:24,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:24,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080217595] [2022-01-10 06:15:24,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080217595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:24,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:24,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031364308] [2022-01-10 06:15:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:24,733 INFO L87 Difference]: Start difference. First operand 546 states and 893 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:24,845 INFO L93 Difference]: Finished difference Result 1040 states and 1710 transitions. [2022-01-10 06:15:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2022-01-10 06:15:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:24,848 INFO L225 Difference]: With dead ends: 1040 [2022-01-10 06:15:24,849 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:15:24,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:24,851 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 85 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:24,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2518 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:15:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:15:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 426 states have (on average 1.647887323943662) internal successors, (702), 445 states have internal predecessors, (702), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 889 transitions. [2022-01-10 06:15:24,863 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 889 transitions. Word has length 111 [2022-01-10 06:15:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:24,864 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 889 transitions. [2022-01-10 06:15:24,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 889 transitions. [2022-01-10 06:15:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:15:24,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:24,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:24,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:25,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:25,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:25,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1243891680, now seen corresponding path program 1 times [2022-01-10 06:15:25,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:25,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174770108] [2022-01-10 06:15:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:25,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:25,079 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:25,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:15:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:25,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:25,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174770108] [2022-01-10 06:15:25,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174770108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:25,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:25,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:25,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663198877] [2022-01-10 06:15:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:25,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:25,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:25,463 INFO L87 Difference]: Start difference. First operand 546 states and 889 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:25,560 INFO L93 Difference]: Finished difference Result 1040 states and 1706 transitions. [2022-01-10 06:15:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 112 [2022-01-10 06:15:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:25,564 INFO L225 Difference]: With dead ends: 1040 [2022-01-10 06:15:25,565 INFO L226 Difference]: Without dead ends: 546 [2022-01-10 06:15:25,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:25,568 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 80 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:25,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 2518 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-10 06:15:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-01-10 06:15:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 426 states have (on average 1.6384976525821595) internal successors, (698), 445 states have internal predecessors, (698), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 885 transitions. [2022-01-10 06:15:25,584 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 885 transitions. Word has length 112 [2022-01-10 06:15:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:25,584 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 885 transitions. [2022-01-10 06:15:25,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 885 transitions. [2022-01-10 06:15:25,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:15:25,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:25,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:25,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 06:15:25,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:25,800 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash -764644192, now seen corresponding path program 1 times [2022-01-10 06:15:25,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:25,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999415257] [2022-01-10 06:15:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:25,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:25,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:25,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:25,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:15:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:26,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:15:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:26,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:26,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999415257] [2022-01-10 06:15:26,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999415257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:26,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:26,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:15:26,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527524481] [2022-01-10 06:15:26,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:26,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:15:26,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:15:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:15:26,169 INFO L87 Difference]: Start difference. First operand 546 states and 885 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:26,226 INFO L93 Difference]: Finished difference Result 1040 states and 1702 transitions. [2022-01-10 06:15:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 112 [2022-01-10 06:15:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:26,229 INFO L225 Difference]: With dead ends: 1040 [2022-01-10 06:15:26,229 INFO L226 Difference]: Without dead ends: 525 [2022-01-10 06:15:26,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:26,231 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 110 mSDsluCounter, 4281 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5154 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:26,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5154 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-10 06:15:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-01-10 06:15:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.6395061728395062) internal successors, (664), 424 states have internal predecessors, (664), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 851 transitions. [2022-01-10 06:15:26,240 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 851 transitions. Word has length 112 [2022-01-10 06:15:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:26,240 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 851 transitions. [2022-01-10 06:15:26,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 851 transitions. [2022-01-10 06:15:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:15:26,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:26,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:26,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:26,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:26,453 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1421577102, now seen corresponding path program 1 times [2022-01-10 06:15:26,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:26,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602015484] [2022-01-10 06:15:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:26,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:26,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:26,455 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:26,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:15:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:26,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:26,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:26,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602015484] [2022-01-10 06:15:26,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602015484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:26,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:26,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:26,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136346138] [2022-01-10 06:15:26,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:26,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:26,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:26,821 INFO L87 Difference]: Start difference. First operand 525 states and 851 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:26,858 INFO L93 Difference]: Finished difference Result 1019 states and 1668 transitions. [2022-01-10 06:15:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-01-10 06:15:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:26,867 INFO L225 Difference]: With dead ends: 1019 [2022-01-10 06:15:26,867 INFO L226 Difference]: Without dead ends: 525 [2022-01-10 06:15:26,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:26,869 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 41 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:26,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2504 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-10 06:15:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-01-10 06:15:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.637037037037037) internal successors, (663), 424 states have internal predecessors, (663), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 850 transitions. [2022-01-10 06:15:26,879 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 850 transitions. Word has length 113 [2022-01-10 06:15:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:26,879 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 850 transitions. [2022-01-10 06:15:26,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:26,880 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 850 transitions. [2022-01-10 06:15:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:15:26,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:26,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:26,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:27,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:27,092 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash -91134491, now seen corresponding path program 1 times [2022-01-10 06:15:27,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:27,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721246008] [2022-01-10 06:15:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:27,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:27,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:15:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:15:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:27,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:27,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:27,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721246008] [2022-01-10 06:15:27,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721246008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:27,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:27,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:27,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748635936] [2022-01-10 06:15:27,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:27,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:15:27,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:15:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:15:27,450 INFO L87 Difference]: Start difference. First operand 525 states and 850 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:27,486 INFO L93 Difference]: Finished difference Result 1019 states and 1667 transitions. [2022-01-10 06:15:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:15:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2022-01-10 06:15:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:27,489 INFO L225 Difference]: With dead ends: 1019 [2022-01-10 06:15:27,489 INFO L226 Difference]: Without dead ends: 525 [2022-01-10 06:15:27,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:27,491 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 39 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:27,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2504 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-10 06:15:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-01-10 06:15:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.634567901234568) internal successors, (662), 424 states have internal predecessors, (662), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 849 transitions. [2022-01-10 06:15:27,500 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 849 transitions. Word has length 114 [2022-01-10 06:15:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:27,500 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 849 transitions. [2022-01-10 06:15:27,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:15:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 849 transitions. [2022-01-10 06:15:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:15:27,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:27,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:27,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:27,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:27,712 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 746636887, now seen corresponding path program 1 times [2022-01-10 06:15:27,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:27,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312515474] [2022-01-10 06:15:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:27,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:27,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:27,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:27,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:15:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:15:28,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:28,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:28,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312515474] [2022-01-10 06:15:28,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312515474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:28,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:28,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:28,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721777569] [2022-01-10 06:15:28,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:28,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:28,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:28,099 INFO L87 Difference]: Start difference. First operand 525 states and 849 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:28,211 INFO L93 Difference]: Finished difference Result 1013 states and 1655 transitions. [2022-01-10 06:15:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:15:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 115 [2022-01-10 06:15:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:28,220 INFO L225 Difference]: With dead ends: 1013 [2022-01-10 06:15:28,220 INFO L226 Difference]: Without dead ends: 525 [2022-01-10 06:15:28,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:15:28,224 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 31 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 5816 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:28,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 5816 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:15:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-10 06:15:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-01-10 06:15:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.6320987654320989) internal successors, (661), 424 states have internal predecessors, (661), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-10 06:15:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 848 transitions. [2022-01-10 06:15:28,235 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 848 transitions. Word has length 115 [2022-01-10 06:15:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:28,235 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 848 transitions. [2022-01-10 06:15:28,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 848 transitions. [2022-01-10 06:15:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 06:15:28,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:28,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:28,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:28,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:28,449 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -103270278, now seen corresponding path program 1 times [2022-01-10 06:15:28,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:28,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768659343] [2022-01-10 06:15:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:28,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:28,451 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:28,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:15:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:15:28,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:28,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768659343] [2022-01-10 06:15:28,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768659343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:28,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:28,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:28,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981100463] [2022-01-10 06:15:28,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:28,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:28,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:28,851 INFO L87 Difference]: Start difference. First operand 525 states and 848 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:29,338 INFO L93 Difference]: Finished difference Result 1009 states and 1672 transitions. [2022-01-10 06:15:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2022-01-10 06:15:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:29,342 INFO L225 Difference]: With dead ends: 1009 [2022-01-10 06:15:29,342 INFO L226 Difference]: Without dead ends: 529 [2022-01-10 06:15:29,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:29,346 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 784 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:29,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2109 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:15:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-10 06:15:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-01-10 06:15:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 408 states have (on average 1.6274509803921569) internal successors, (664), 427 states have internal predecessors, (664), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (92), 89 states have call predecessors, (92), 91 states have call successors, (92) [2022-01-10 06:15:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 852 transitions. [2022-01-10 06:15:29,379 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 852 transitions. Word has length 116 [2022-01-10 06:15:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:29,379 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 852 transitions. [2022-01-10 06:15:29,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 852 transitions. [2022-01-10 06:15:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-10 06:15:29,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:29,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:29,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:29,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:29,593 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash 243649490, now seen corresponding path program 1 times [2022-01-10 06:15:29,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550340429] [2022-01-10 06:15:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:29,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:29,596 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:29,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:15:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:29,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:29,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:15:30,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:30,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550340429] [2022-01-10 06:15:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550340429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:30,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:30,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:30,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874218950] [2022-01-10 06:15:30,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:30,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:30,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:30,027 INFO L87 Difference]: Start difference. First operand 529 states and 852 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:30,487 INFO L93 Difference]: Finished difference Result 1018 states and 1679 transitions. [2022-01-10 06:15:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:30,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2022-01-10 06:15:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:30,490 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:15:30,490 INFO L226 Difference]: Without dead ends: 534 [2022-01-10 06:15:30,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:30,493 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 794 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:30,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 2110 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:15:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-10 06:15:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2022-01-10 06:15:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 412 states have (on average 1.6213592233009708) internal successors, (668), 431 states have internal predecessors, (668), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (93), 89 states have call predecessors, (93), 91 states have call successors, (93) [2022-01-10 06:15:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 857 transitions. [2022-01-10 06:15:30,504 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 857 transitions. Word has length 118 [2022-01-10 06:15:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 857 transitions. [2022-01-10 06:15:30,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 857 transitions. [2022-01-10 06:15:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 06:15:30,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:30,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:30,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:15:30,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:30,718 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1893765370, now seen corresponding path program 1 times [2022-01-10 06:15:30,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:30,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133710884] [2022-01-10 06:15:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:30,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:30,719 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:30,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:15:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:30,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:15:31,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:31,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133710884] [2022-01-10 06:15:31,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133710884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:31,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733713316] [2022-01-10 06:15:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:31,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:31,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:31,121 INFO L87 Difference]: Start difference. First operand 534 states and 857 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:31,580 INFO L93 Difference]: Finished difference Result 1029 states and 1688 transitions. [2022-01-10 06:15:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:31,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-01-10 06:15:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:31,583 INFO L225 Difference]: With dead ends: 1029 [2022-01-10 06:15:31,583 INFO L226 Difference]: Without dead ends: 540 [2022-01-10 06:15:31,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:31,585 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 785 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:31,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2110 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:15:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-10 06:15:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-01-10 06:15:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 417 states have (on average 1.6139088729016786) internal successors, (673), 436 states have internal predecessors, (673), 96 states have call successors, (96), 27 states have call predecessors, (96), 26 states have return successors, (94), 89 states have call predecessors, (94), 91 states have call successors, (94) [2022-01-10 06:15:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 863 transitions. [2022-01-10 06:15:31,595 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 863 transitions. Word has length 120 [2022-01-10 06:15:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:31,596 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 863 transitions. [2022-01-10 06:15:31,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 863 transitions. [2022-01-10 06:15:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-10 06:15:31,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:31,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:31,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:31,809 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1197558838, now seen corresponding path program 1 times [2022-01-10 06:15:31,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706370404] [2022-01-10 06:15:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:31,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:31,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:31,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:31,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:15:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:15:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:15:32,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:32,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:32,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706370404] [2022-01-10 06:15:32,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706370404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:32,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:32,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:15:32,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036730568] [2022-01-10 06:15:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:32,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:15:32,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:32,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:15:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:15:32,315 INFO L87 Difference]: Start difference. First operand 540 states and 863 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:32,745 INFO L93 Difference]: Finished difference Result 1042 states and 1699 transitions. [2022-01-10 06:15:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:15:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2022-01-10 06:15:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:32,748 INFO L225 Difference]: With dead ends: 1042 [2022-01-10 06:15:32,748 INFO L226 Difference]: Without dead ends: 547 [2022-01-10 06:15:32,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:15:32,750 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 786 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:32,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2110 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:15:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-10 06:15:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-01-10 06:15:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 423 states have (on average 1.6052009456264775) internal successors, (679), 442 states have internal predecessors, (679), 96 states have call successors, (96), 28 states have call predecessors, (96), 27 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2022-01-10 06:15:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 870 transitions. [2022-01-10 06:15:32,760 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 870 transitions. Word has length 122 [2022-01-10 06:15:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:32,760 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 870 transitions. [2022-01-10 06:15:32,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:15:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 870 transitions. [2022-01-10 06:15:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:15:32,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:32,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:32,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:15:32,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:32,973 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:32,973 INFO L85 PathProgramCache]: Analyzing trace with hash 706267002, now seen corresponding path program 1 times [2022-01-10 06:15:32,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:32,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548911391] [2022-01-10 06:15:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:32,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:32,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:32,978 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:15:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:15:33,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:15:33,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:15:34,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548911391] [2022-01-10 06:15:34,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548911391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:34,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:34,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-01-10 06:15:34,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351098661] [2022-01-10 06:15:34,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:34,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:15:34,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:15:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:15:34,170 INFO L87 Difference]: Start difference. First operand 547 states and 870 transitions. Second operand has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (25), 5 states have call predecessors, (25), 10 states have return successors, (26), 12 states have call predecessors, (26), 7 states have call successors, (26) [2022-01-10 06:15:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:40,704 INFO L93 Difference]: Finished difference Result 1822 states and 2985 transitions. [2022-01-10 06:15:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:15:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (25), 5 states have call predecessors, (25), 10 states have return successors, (26), 12 states have call predecessors, (26), 7 states have call successors, (26) Word has length 124 [2022-01-10 06:15:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:40,710 INFO L225 Difference]: With dead ends: 1822 [2022-01-10 06:15:40,710 INFO L226 Difference]: Without dead ends: 1320 [2022-01-10 06:15:40,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:15:40,713 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 4488 mSDsluCounter, 5669 mSDsCounter, 0 mSdLazyCounter, 10474 mSolverCounterSat, 1685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4567 SdHoareTripleChecker+Valid, 7361 SdHoareTripleChecker+Invalid, 12159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1685 IncrementalHoareTripleChecker+Valid, 10474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:40,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4567 Valid, 7361 Invalid, 12159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1685 Valid, 10474 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-01-10 06:15:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-01-10 06:15:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1166. [2022-01-10 06:15:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 883 states have (on average 1.610419026047565) internal successors, (1422), 923 states have internal predecessors, (1422), 224 states have call successors, (224), 52 states have call predecessors, (224), 58 states have return successors, (246), 221 states have call predecessors, (246), 219 states have call successors, (246) [2022-01-10 06:15:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1892 transitions. [2022-01-10 06:15:40,789 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1892 transitions. Word has length 124 [2022-01-10 06:15:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1892 transitions. [2022-01-10 06:15:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (25), 5 states have call predecessors, (25), 10 states have return successors, (26), 12 states have call predecessors, (26), 7 states have call successors, (26) [2022-01-10 06:15:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1892 transitions. [2022-01-10 06:15:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-10 06:15:40,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:40,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:40,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:41,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:41,012 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1099452992, now seen corresponding path program 1 times [2022-01-10 06:15:41,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:41,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531940612] [2022-01-10 06:15:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:41,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:41,014 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:41,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:15:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:15:41,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:41,479 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531940612] [2022-01-10 06:15:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531940612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:41,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:41,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:41,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578654468] [2022-01-10 06:15:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:41,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:41,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:41,481 INFO L87 Difference]: Start difference. First operand 1166 states and 1892 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:41,558 INFO L93 Difference]: Finished difference Result 1671 states and 2711 transitions. [2022-01-10 06:15:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:15:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 127 [2022-01-10 06:15:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:41,561 INFO L225 Difference]: With dead ends: 1671 [2022-01-10 06:15:41,561 INFO L226 Difference]: Without dead ends: 539 [2022-01-10 06:15:41,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:15:41,565 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 27 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:41,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 5761 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:15:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-10 06:15:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2022-01-10 06:15:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 417 states have (on average 1.5995203836930456) internal successors, (667), 436 states have internal predecessors, (667), 94 states have call successors, (94), 28 states have call predecessors, (94), 27 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2022-01-10 06:15:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 854 transitions. [2022-01-10 06:15:41,581 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 854 transitions. Word has length 127 [2022-01-10 06:15:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:41,581 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 854 transitions. [2022-01-10 06:15:41,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:15:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 854 transitions. [2022-01-10 06:15:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 06:15:41,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:41,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:41,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:41,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:41,794 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash 504716146, now seen corresponding path program 1 times [2022-01-10 06:15:41,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:41,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251206826] [2022-01-10 06:15:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:41,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:41,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:41,797 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:41,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:15:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:42,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:15:42,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:15:42,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:15:42,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251206826] [2022-01-10 06:15:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251206826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:42,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:42,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:15:42,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379333610] [2022-01-10 06:15:42,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:42,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:15:42,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:15:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:15:42,815 INFO L87 Difference]: Start difference. First operand 539 states and 854 transitions. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 12 states have internal predecessors, (159), 8 states have call successors, (26), 5 states have call predecessors, (26), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2022-01-10 06:15:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:45,096 INFO L93 Difference]: Finished difference Result 1042 states and 1678 transitions. [2022-01-10 06:15:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:15:45,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 12 states have internal predecessors, (159), 8 states have call successors, (26), 5 states have call predecessors, (26), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 130 [2022-01-10 06:15:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:45,100 INFO L225 Difference]: With dead ends: 1042 [2022-01-10 06:15:45,100 INFO L226 Difference]: Without dead ends: 545 [2022-01-10 06:15:45,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:15:45,103 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1284 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 3945 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 4308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 3945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:45,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 2733 Invalid, 4308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 3945 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 06:15:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-10 06:15:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 543. [2022-01-10 06:15:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 420 states have (on average 1.5952380952380953) internal successors, (670), 439 states have internal predecessors, (670), 94 states have call successors, (94), 28 states have call predecessors, (94), 28 states have return successors, (98), 88 states have call predecessors, (98), 89 states have call successors, (98) [2022-01-10 06:15:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 862 transitions. [2022-01-10 06:15:45,114 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 862 transitions. Word has length 130 [2022-01-10 06:15:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:45,114 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 862 transitions. [2022-01-10 06:15:45,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 12 states have internal predecessors, (159), 8 states have call successors, (26), 5 states have call predecessors, (26), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2022-01-10 06:15:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 862 transitions. [2022-01-10 06:15:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:15:45,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:45,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:45,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:45,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:45,329 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1705217254, now seen corresponding path program 1 times [2022-01-10 06:15:45,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:45,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822826818] [2022-01-10 06:15:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:45,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:45,331 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:45,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:15:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:15:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:15:45,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:15:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:15:46,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822826818] [2022-01-10 06:15:46,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822826818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:15:46,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:15:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-01-10 06:15:46,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133241568] [2022-01-10 06:15:46,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:15:46,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:15:46,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:15:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:15:46,090 INFO L87 Difference]: Start difference. First operand 543 states and 862 transitions. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 6 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-01-10 06:15:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:48,901 INFO L93 Difference]: Finished difference Result 2048 states and 3331 transitions. [2022-01-10 06:15:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:15:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 6 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 131 [2022-01-10 06:15:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:48,917 INFO L225 Difference]: With dead ends: 2048 [2022-01-10 06:15:48,917 INFO L226 Difference]: Without dead ends: 1547 [2022-01-10 06:15:48,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:15:48,932 INFO L933 BasicCegarLoop]: 1355 mSDtfsCounter, 4997 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 1445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5081 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 5582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1445 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5081 Valid, 3088 Invalid, 5582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1445 Valid, 4137 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 06:15:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2022-01-10 06:15:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1484. [2022-01-10 06:15:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1144 states have (on average 1.5996503496503496) internal successors, (1830), 1190 states have internal predecessors, (1830), 262 states have call successors, (262), 77 states have call predecessors, (262), 77 states have return successors, (290), 253 states have call predecessors, (290), 257 states have call successors, (290) [2022-01-10 06:15:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2382 transitions. [2022-01-10 06:15:49,021 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2382 transitions. Word has length 131 [2022-01-10 06:15:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:49,021 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2382 transitions. [2022-01-10 06:15:49,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 6 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-01-10 06:15:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2382 transitions. [2022-01-10 06:15:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:15:49,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:49,023 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:49,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:49,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:49,234 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1800959558, now seen corresponding path program 1 times [2022-01-10 06:15:49,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955795512] [2022-01-10 06:15:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:49,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:49,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:49,236 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:49,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:15:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:15:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:15:49,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:49,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:49,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955795512] [2022-01-10 06:15:49,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955795512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:49,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:49,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:49,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026925433] [2022-01-10 06:15:49,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:49,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:49,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:49,747 INFO L87 Difference]: Start difference. First operand 1484 states and 2382 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 6 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:15:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:52,706 INFO L93 Difference]: Finished difference Result 4789 states and 7862 transitions. [2022-01-10 06:15:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:15:52,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 6 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 133 [2022-01-10 06:15:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:52,723 INFO L225 Difference]: With dead ends: 4789 [2022-01-10 06:15:52,724 INFO L226 Difference]: Without dead ends: 3347 [2022-01-10 06:15:52,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:15:52,730 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3087 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 4245 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 4993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 4245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:52,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 3056 Invalid, 4993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 4245 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 06:15:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2022-01-10 06:15:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3216. [2022-01-10 06:15:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 2437 states have (on average 1.5962248666393106) internal successors, (3890), 2546 states have internal predecessors, (3890), 619 states have call successors, (619), 149 states have call predecessors, (619), 159 states have return successors, (746), 609 states have call predecessors, (746), 614 states have call successors, (746) [2022-01-10 06:15:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 5255 transitions. [2022-01-10 06:15:52,826 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 5255 transitions. Word has length 133 [2022-01-10 06:15:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:52,827 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 5255 transitions. [2022-01-10 06:15:52,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 6 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:15:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 5255 transitions. [2022-01-10 06:15:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:15:52,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:52,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:52,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:53,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:53,038 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1592261255, now seen corresponding path program 1 times [2022-01-10 06:15:53,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51814492] [2022-01-10 06:15:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:53,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:53,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:53,040 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:53,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:15:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:15:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:15:53,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:53,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:53,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51814492] [2022-01-10 06:15:53,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51814492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:53,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:53,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:15:53,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652587554] [2022-01-10 06:15:53,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:53,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:15:53,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:15:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:15:53,535 INFO L87 Difference]: Start difference. First operand 3216 states and 5255 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-10 06:15:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:56,592 INFO L93 Difference]: Finished difference Result 9070 states and 14893 transitions. [2022-01-10 06:15:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:15:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 133 [2022-01-10 06:15:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:56,620 INFO L225 Difference]: With dead ends: 9070 [2022-01-10 06:15:56,620 INFO L226 Difference]: Without dead ends: 6642 [2022-01-10 06:15:56,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:15:56,632 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 2929 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 3719 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3006 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 3719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:56,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3006 Valid, 2711 Invalid, 4336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 3719 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 06:15:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6642 states. [2022-01-10 06:15:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6642 to 6359. [2022-01-10 06:15:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6359 states, 4836 states have (on average 1.5887096774193548) internal successors, (7683), 5046 states have internal predecessors, (7683), 1183 states have call successors, (1183), 287 states have call predecessors, (1183), 339 states have return successors, (1521), 1172 states have call predecessors, (1521), 1178 states have call successors, (1521) [2022-01-10 06:15:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6359 states to 6359 states and 10387 transitions. [2022-01-10 06:15:56,884 INFO L78 Accepts]: Start accepts. Automaton has 6359 states and 10387 transitions. Word has length 133 [2022-01-10 06:15:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 6359 states and 10387 transitions. [2022-01-10 06:15:56,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-10 06:15:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6359 states and 10387 transitions. [2022-01-10 06:15:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 06:15:56,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:56,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:56,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:57,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:57,101 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash 814086407, now seen corresponding path program 1 times [2022-01-10 06:15:57,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:57,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107851537] [2022-01-10 06:15:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:57,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:57,103 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:57,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:15:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:15:57,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:15:57,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:15:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:15:57,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:15:57,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:15:57,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107851537] [2022-01-10 06:15:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107851537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:15:57,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:15:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-10 06:15:57,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261380008] [2022-01-10 06:15:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:15:57,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:15:57,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:15:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:15:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:15:57,656 INFO L87 Difference]: Start difference. First operand 6359 states and 10387 transitions. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 9 states have internal predecessors, (94), 6 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2022-01-10 06:15:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:15:59,445 INFO L93 Difference]: Finished difference Result 11878 states and 19457 transitions. [2022-01-10 06:15:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:15:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 9 states have internal predecessors, (94), 6 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) Word has length 135 [2022-01-10 06:15:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:15:59,471 INFO L225 Difference]: With dead ends: 11878 [2022-01-10 06:15:59,471 INFO L226 Difference]: Without dead ends: 6311 [2022-01-10 06:15:59,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:15:59,488 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 1384 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:15:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1384 Valid, 2446 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 06:15:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2022-01-10 06:15:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 6311. [2022-01-10 06:15:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6311 states, 4810 states have (on average 1.5889812889812889) internal successors, (7643), 5016 states have internal predecessors, (7643), 1169 states have call successors, (1169), 283 states have call predecessors, (1169), 331 states have return successors, (1499), 1158 states have call predecessors, (1499), 1164 states have call successors, (1499) [2022-01-10 06:15:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6311 states to 6311 states and 10311 transitions. [2022-01-10 06:15:59,687 INFO L78 Accepts]: Start accepts. Automaton has 6311 states and 10311 transitions. Word has length 135 [2022-01-10 06:15:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:15:59,689 INFO L470 AbstractCegarLoop]: Abstraction has 6311 states and 10311 transitions. [2022-01-10 06:15:59,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 9 states have internal predecessors, (94), 6 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2022-01-10 06:15:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6311 states and 10311 transitions. [2022-01-10 06:15:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-10 06:15:59,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:15:59,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:15:59,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:15:59,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:15:59,902 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:15:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:15:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 954608261, now seen corresponding path program 1 times [2022-01-10 06:15:59,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:15:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293798035] [2022-01-10 06:15:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:15:59,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:15:59,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:15:59,904 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:15:59,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:16:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:16:00,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:16:00,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:00,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:00,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293798035] [2022-01-10 06:16:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293798035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:00,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:00,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:16:00,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538809335] [2022-01-10 06:16:00,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:00,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:16:00,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:16:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:16:00,513 INFO L87 Difference]: Start difference. First operand 6311 states and 10311 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 8 states have internal predecessors, (95), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:16:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:03,881 INFO L93 Difference]: Finished difference Result 13081 states and 21281 transitions. [2022-01-10 06:16:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:16:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 8 states have internal predecessors, (95), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 138 [2022-01-10 06:16:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:03,954 INFO L225 Difference]: With dead ends: 13081 [2022-01-10 06:16:03,955 INFO L226 Difference]: Without dead ends: 7536 [2022-01-10 06:16:03,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:16:03,997 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 1963 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 4882 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 3099 SdHoareTripleChecker+Invalid, 5379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 4882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:03,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2037 Valid, 3099 Invalid, 5379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 4882 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 06:16:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2022-01-10 06:16:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 6991. [2022-01-10 06:16:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 5314 states have (on average 1.5583364697026723) internal successors, (8281), 5550 states have internal predecessors, (8281), 1269 states have call successors, (1269), 347 states have call predecessors, (1269), 407 states have return successors, (1677), 1240 states have call predecessors, (1677), 1264 states have call successors, (1677) [2022-01-10 06:16:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 11227 transitions. [2022-01-10 06:16:04,463 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 11227 transitions. Word has length 138 [2022-01-10 06:16:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:04,465 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 11227 transitions. [2022-01-10 06:16:04,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 8 states have internal predecessors, (95), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:16:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 11227 transitions. [2022-01-10 06:16:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 06:16:04,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:04,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:04,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:04,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:04,678 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:04,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1056403260, now seen corresponding path program 1 times [2022-01-10 06:16:04,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723123101] [2022-01-10 06:16:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:04,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:04,680 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:04,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:16:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:04,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:16:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:16:05,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:05,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723123101] [2022-01-10 06:16:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723123101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:05,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:05,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:16:05,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58118458] [2022-01-10 06:16:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:16:05,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:16:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:05,138 INFO L87 Difference]: Start difference. First operand 6991 states and 11227 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:16:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:05,426 INFO L93 Difference]: Finished difference Result 13750 states and 22239 transitions. [2022-01-10 06:16:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:16:05,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 145 [2022-01-10 06:16:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:05,501 INFO L225 Difference]: With dead ends: 13750 [2022-01-10 06:16:05,501 INFO L226 Difference]: Without dead ends: 6991 [2022-01-10 06:16:05,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:16:05,514 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 401 mSDsluCounter, 2131 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:05,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2991 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:16:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2022-01-10 06:16:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 6991. [2022-01-10 06:16:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 5314 states have (on average 1.5380127963869026) internal successors, (8173), 5550 states have internal predecessors, (8173), 1269 states have call successors, (1269), 347 states have call predecessors, (1269), 407 states have return successors, (1677), 1240 states have call predecessors, (1677), 1264 states have call successors, (1677) [2022-01-10 06:16:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 11119 transitions. [2022-01-10 06:16:05,716 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 11119 transitions. Word has length 145 [2022-01-10 06:16:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:05,716 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 11119 transitions. [2022-01-10 06:16:05,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:16:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 11119 transitions. [2022-01-10 06:16:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 06:16:05,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:05,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:05,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 06:16:05,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:05,929 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:05,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1481250580, now seen corresponding path program 1 times [2022-01-10 06:16:05,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:05,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669501390] [2022-01-10 06:16:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:05,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:05,932 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:05,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:16:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:06,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:16:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:16:06,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:06,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:06,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669501390] [2022-01-10 06:16:06,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669501390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:06,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:06,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:16:06,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959803018] [2022-01-10 06:16:06,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:06,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:16:06,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:16:06,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:16:06,407 INFO L87 Difference]: Start difference. First operand 6991 states and 11119 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 06:16:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:09,069 INFO L93 Difference]: Finished difference Result 13782 states and 22005 transitions. [2022-01-10 06:16:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:16:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 150 [2022-01-10 06:16:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:09,103 INFO L225 Difference]: With dead ends: 13782 [2022-01-10 06:16:09,104 INFO L226 Difference]: Without dead ends: 7764 [2022-01-10 06:16:09,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:16:09,123 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 1963 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 3110 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2044 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 3110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:09,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2044 Valid, 2142 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 3110 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 06:16:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2022-01-10 06:16:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7309. [2022-01-10 06:16:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 5548 states have (on average 1.5264960346070655) internal successors, (8469), 5810 states have internal predecessors, (8469), 1297 states have call successors, (1297), 377 states have call predecessors, (1297), 463 states have return successors, (1775), 1268 states have call predecessors, (1775), 1292 states have call successors, (1775) [2022-01-10 06:16:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 11541 transitions. [2022-01-10 06:16:09,404 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 11541 transitions. Word has length 150 [2022-01-10 06:16:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:09,404 INFO L470 AbstractCegarLoop]: Abstraction has 7309 states and 11541 transitions. [2022-01-10 06:16:09,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 06:16:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 11541 transitions. [2022-01-10 06:16:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 06:16:09,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:09,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:09,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:09,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:09,617 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash -155946475, now seen corresponding path program 1 times [2022-01-10 06:16:09,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:09,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85315193] [2022-01-10 06:16:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:09,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:09,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:09,619 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:09,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:16:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:16:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:16:10,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:10,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:10,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85315193] [2022-01-10 06:16:10,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85315193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:10,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:10,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:16:10,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304444473] [2022-01-10 06:16:10,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:10,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:16:10,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:16:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:10,175 INFO L87 Difference]: Start difference. First operand 7309 states and 11541 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 7 states have internal predecessors, (105), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 06:16:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:13,219 INFO L93 Difference]: Finished difference Result 13962 states and 22089 transitions. [2022-01-10 06:16:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:16:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 7 states have internal predecessors, (105), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 155 [2022-01-10 06:16:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:13,246 INFO L225 Difference]: With dead ends: 13962 [2022-01-10 06:16:13,246 INFO L226 Difference]: Without dead ends: 7625 [2022-01-10 06:16:13,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:16:13,267 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 1607 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 3862 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 3862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:13,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2544 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 3862 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 06:16:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7625 states. [2022-01-10 06:16:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7625 to 7164. [2022-01-10 06:16:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 5439 states have (on average 1.5238095238095237) internal successors, (8288), 5694 states have internal predecessors, (8288), 1273 states have call successors, (1273), 377 states have call predecessors, (1273), 451 states have return successors, (1710), 1239 states have call predecessors, (1710), 1268 states have call successors, (1710) [2022-01-10 06:16:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 11271 transitions. [2022-01-10 06:16:13,589 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 11271 transitions. Word has length 155 [2022-01-10 06:16:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:13,589 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 11271 transitions. [2022-01-10 06:16:13,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 7 states have internal predecessors, (105), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 06:16:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 11271 transitions. [2022-01-10 06:16:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 06:16:13,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:13,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:13,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:13,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:13,803 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash -665419565, now seen corresponding path program 1 times [2022-01-10 06:16:13,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:13,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268663209] [2022-01-10 06:16:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:13,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:13,806 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:13,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:16:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:16:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:16:14,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:14,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268663209] [2022-01-10 06:16:14,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268663209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:14,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:14,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 06:16:14,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217271255] [2022-01-10 06:16:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:14,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:16:14,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:16:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:16:14,374 INFO L87 Difference]: Start difference. First operand 7164 states and 11271 transitions. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 8 states have internal predecessors, (103), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 06:16:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:17,063 INFO L93 Difference]: Finished difference Result 15861 states and 25136 transitions. [2022-01-10 06:16:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:16:17,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 8 states have internal predecessors, (103), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) Word has length 155 [2022-01-10 06:16:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:17,155 INFO L225 Difference]: With dead ends: 15861 [2022-01-10 06:16:17,155 INFO L226 Difference]: Without dead ends: 9645 [2022-01-10 06:16:17,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:16:17,180 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1722 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 4174 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 2423 SdHoareTripleChecker+Invalid, 4610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 4174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:17,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 2423 Invalid, 4610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 4174 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 06:16:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2022-01-10 06:16:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 9446. [2022-01-10 06:16:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9446 states, 7153 states have (on average 1.519642108206347) internal successors, (10870), 7504 states have internal predecessors, (10870), 1705 states have call successors, (1705), 505 states have call predecessors, (1705), 587 states have return successors, (2318), 1639 states have call predecessors, (2318), 1700 states have call successors, (2318) [2022-01-10 06:16:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9446 states to 9446 states and 14893 transitions. [2022-01-10 06:16:17,476 INFO L78 Accepts]: Start accepts. Automaton has 9446 states and 14893 transitions. Word has length 155 [2022-01-10 06:16:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:17,477 INFO L470 AbstractCegarLoop]: Abstraction has 9446 states and 14893 transitions. [2022-01-10 06:16:17,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 8 states have internal predecessors, (103), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 06:16:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9446 states and 14893 transitions. [2022-01-10 06:16:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 06:16:17,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:17,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:17,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:17,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:17,691 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1097176190, now seen corresponding path program 1 times [2022-01-10 06:16:17,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:17,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190526683] [2022-01-10 06:16:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:17,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:17,693 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:17,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:16:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:16:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:16:18,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:18,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190526683] [2022-01-10 06:16:18,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190526683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:18,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:18,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:16:18,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026564043] [2022-01-10 06:16:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:18,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:16:18,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:16:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:18,175 INFO L87 Difference]: Start difference. First operand 9446 states and 14893 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-10 06:16:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:18,708 INFO L93 Difference]: Finished difference Result 9547 states and 15055 transitions. [2022-01-10 06:16:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:16:18,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 156 [2022-01-10 06:16:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:18,750 INFO L225 Difference]: With dead ends: 9547 [2022-01-10 06:16:18,750 INFO L226 Difference]: Without dead ends: 9532 [2022-01-10 06:16:18,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:18,761 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 771 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:18,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 2075 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:16:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9532 states. [2022-01-10 06:16:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9532 to 9455. [2022-01-10 06:16:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 7162 states have (on average 1.5189891091873777) internal successors, (10879), 7513 states have internal predecessors, (10879), 1705 states have call successors, (1705), 505 states have call predecessors, (1705), 587 states have return successors, (2318), 1639 states have call predecessors, (2318), 1700 states have call successors, (2318) [2022-01-10 06:16:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 14902 transitions. [2022-01-10 06:16:19,135 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 14902 transitions. Word has length 156 [2022-01-10 06:16:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:19,135 INFO L470 AbstractCegarLoop]: Abstraction has 9455 states and 14902 transitions. [2022-01-10 06:16:19,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-10 06:16:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 14902 transitions. [2022-01-10 06:16:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 06:16:19,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:19,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:19,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:19,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:19,351 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash -890789955, now seen corresponding path program 1 times [2022-01-10 06:16:19,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:19,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747474932] [2022-01-10 06:16:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:19,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:19,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:19,353 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:19,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:16:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:16:19,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:16:19,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:19,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:19,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747474932] [2022-01-10 06:16:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747474932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:19,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:16:19,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029683628] [2022-01-10 06:16:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:19,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:16:19,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:16:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:19,748 INFO L87 Difference]: Start difference. First operand 9455 states and 14902 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 1 states have call successors, (17) [2022-01-10 06:16:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:19,963 INFO L93 Difference]: Finished difference Result 9476 states and 14929 transitions. [2022-01-10 06:16:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:16:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 1 states have call successors, (17) Word has length 162 [2022-01-10 06:16:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:19,998 INFO L225 Difference]: With dead ends: 9476 [2022-01-10 06:16:19,998 INFO L226 Difference]: Without dead ends: 9461 [2022-01-10 06:16:20,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:16:20,007 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 37 mSDsluCounter, 2412 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:20,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3232 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9461 states. [2022-01-10 06:16:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9461 to 9455. [2022-01-10 06:16:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 7162 states have (on average 1.5170343479475008) internal successors, (10865), 7513 states have internal predecessors, (10865), 1705 states have call successors, (1705), 505 states have call predecessors, (1705), 587 states have return successors, (2318), 1639 states have call predecessors, (2318), 1700 states have call successors, (2318) [2022-01-10 06:16:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 14888 transitions. [2022-01-10 06:16:20,393 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 14888 transitions. Word has length 162 [2022-01-10 06:16:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:20,393 INFO L470 AbstractCegarLoop]: Abstraction has 9455 states and 14888 transitions. [2022-01-10 06:16:20,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 1 states have call successors, (17) [2022-01-10 06:16:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 14888 transitions. [2022-01-10 06:16:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 06:16:20,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:20,396 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:20,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:20,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:20,607 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -488692740, now seen corresponding path program 1 times [2022-01-10 06:16:20,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018548977] [2022-01-10 06:16:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:20,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:20,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:20,609 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:20,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:16:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:16:20,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 06:16:21,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:21,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:21,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018548977] [2022-01-10 06:16:21,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018548977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:21,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:21,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:16:21,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508599616] [2022-01-10 06:16:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:21,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:16:21,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:16:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:21,177 INFO L87 Difference]: Start difference. First operand 9455 states and 14888 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 7 states have internal predecessors, (116), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:16:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:22,852 INFO L93 Difference]: Finished difference Result 18904 states and 29777 transitions. [2022-01-10 06:16:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 7 states have internal predecessors, (116), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) Word has length 173 [2022-01-10 06:16:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:22,887 INFO L225 Difference]: With dead ends: 18904 [2022-01-10 06:16:22,887 INFO L226 Difference]: Without dead ends: 9503 [2022-01-10 06:16:22,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:16:22,911 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 1210 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:22,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 1830 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 06:16:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9503 states. [2022-01-10 06:16:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9503 to 9455. [2022-01-10 06:16:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 7162 states have (on average 1.5150795867076237) internal successors, (10851), 7513 states have internal predecessors, (10851), 1705 states have call successors, (1705), 505 states have call predecessors, (1705), 587 states have return successors, (2318), 1639 states have call predecessors, (2318), 1700 states have call successors, (2318) [2022-01-10 06:16:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 14874 transitions. [2022-01-10 06:16:23,253 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 14874 transitions. Word has length 173 [2022-01-10 06:16:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:23,253 INFO L470 AbstractCegarLoop]: Abstraction has 9455 states and 14874 transitions. [2022-01-10 06:16:23,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 7 states have internal predecessors, (116), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:16:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 14874 transitions. [2022-01-10 06:16:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 06:16:23,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:23,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:23,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:23,468 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1655401774, now seen corresponding path program 1 times [2022-01-10 06:16:23,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25451081] [2022-01-10 06:16:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:23,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:23,470 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:23,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:16:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:16:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 06:16:23,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:16:23,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25451081] [2022-01-10 06:16:23,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25451081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:16:23,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:16:23,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:16:23,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461786323] [2022-01-10 06:16:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:16:23,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:16:23,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:16:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:16:23,973 INFO L87 Difference]: Start difference. First operand 9455 states and 14874 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-01-10 06:16:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:24,306 INFO L93 Difference]: Finished difference Result 9680 states and 15233 transitions. [2022-01-10 06:16:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:16:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 182 [2022-01-10 06:16:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:24,334 INFO L225 Difference]: With dead ends: 9680 [2022-01-10 06:16:24,335 INFO L226 Difference]: Without dead ends: 9665 [2022-01-10 06:16:24,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:16:24,338 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 66 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:16:24,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 3363 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:16:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9665 states. [2022-01-10 06:16:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9665 to 9476. [2022-01-10 06:16:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 7183 states have (on average 1.5125991925379367) internal successors, (10865), 7534 states have internal predecessors, (10865), 1705 states have call successors, (1705), 505 states have call predecessors, (1705), 587 states have return successors, (2318), 1639 states have call predecessors, (2318), 1700 states have call successors, (2318) [2022-01-10 06:16:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 14888 transitions. [2022-01-10 06:16:24,618 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 14888 transitions. Word has length 182 [2022-01-10 06:16:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:16:24,619 INFO L470 AbstractCegarLoop]: Abstraction has 9476 states and 14888 transitions. [2022-01-10 06:16:24,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-01-10 06:16:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 14888 transitions. [2022-01-10 06:16:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-10 06:16:24,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:16:24,623 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:16:24,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:16:24,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:16:24,838 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:16:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:16:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash 809006656, now seen corresponding path program 1 times [2022-01-10 06:16:24,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:16:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754088807] [2022-01-10 06:16:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:16:24,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:16:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:16:24,841 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:16:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 06:16:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:16:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:16:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:16:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-10 06:16:25,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:16:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-01-10 06:16:25,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:16:25,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754088807] [2022-01-10 06:16:25,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754088807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:16:25,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:16:25,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-01-10 06:16:25,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292259943] [2022-01-10 06:16:25,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:16:25,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:16:25,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:16:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:16:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:16:25,910 INFO L87 Difference]: Start difference. First operand 9476 states and 14888 transitions. Second operand has 15 states, 15 states have (on average 12.8) internal successors, (192), 13 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (37), 10 states have call predecessors, (37), 7 states have call successors, (37) [2022-01-10 06:16:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:16:29,401 INFO L93 Difference]: Finished difference Result 30510 states and 48456 transitions. [2022-01-10 06:16:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:16:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.8) internal successors, (192), 13 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (37), 10 states have call predecessors, (37), 7 states have call successors, (37) Word has length 216 [2022-01-10 06:16:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:16:29,496 INFO L225 Difference]: With dead ends: 30510 [2022-01-10 06:16:29,496 INFO L226 Difference]: Without dead ends: 21088