/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:49:52,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:49:52,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:49:52,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:49:52,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:49:52,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:49:52,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:49:52,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:49:52,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:49:52,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:49:52,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:49:52,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:49:52,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:49:52,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:49:52,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:49:52,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:49:52,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:49:52,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:49:52,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:49:52,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:49:52,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:49:52,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:49:52,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:49:52,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:49:52,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:49:52,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:49:52,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:49:52,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:49:52,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:49:52,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:49:52,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:49:52,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:49:52,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:49:52,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:49:52,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:49:52,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:49:52,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:49:52,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:49:52,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:49:52,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:49:52,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:49:52,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 23:49:52,975 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:49:52,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:49:52,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:49:52,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:49:52,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:49:52,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:49:52,977 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:49:52,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:49:52,977 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:49:52,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:49:52,977 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:49:52,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:49:52,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:49:52,978 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:49:52,978 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:49:52,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:49:52,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:49:52,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:49:52,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:49:52,980 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:49:52,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:49:52,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:49:52,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:49:52,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:49:52,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:49:52,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:49:52,981 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:49:52,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:49:52,981 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:49:52,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:49:52,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:49:52,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:49:52,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:49:52,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:49:52,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:49:52,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:49:52,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:49:52,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:49:52,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:49:52,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:49:52,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:49:52,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:49:53,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:49:53,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:49:53,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:49:53,231 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:49:53,232 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:49:53,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2023-04-02 23:49:54,438 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:49:54,793 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:49:54,793 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2023-04-02 23:49:54,816 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac6e387c1/51a474eb07564cf8bf944102a579c961/FLAGfa0849fb3 [2023-04-02 23:49:54,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac6e387c1/51a474eb07564cf8bf944102a579c961 [2023-04-02 23:49:54,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:49:54,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:49:54,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:49:54,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:49:54,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:49:54,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:49:54" (1/1) ... [2023-04-02 23:49:54,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b14acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:54, skipping insertion in model container [2023-04-02 23:49:54,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:49:54" (1/1) ... [2023-04-02 23:49:54,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:49:54,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:49:55,105 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2023-04-02 23:49:55,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:49:55,425 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:49:55,459 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2023-04-02 23:49:55,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:49:55,571 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:49:55,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55 WrapperNode [2023-04-02 23:49:55,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:49:55,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:49:55,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:49:55,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:49:55,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:49:55,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:49:55,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:49:55,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:49:55,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (1/1) ... [2023-04-02 23:49:55,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:49:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:49:55,752 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) [2023-04-02 23:49:55,772 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 [2023-04-02 23:49:55,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:49:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:49:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:49:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:49:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:49:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:49:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:49:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:49:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:49:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:49:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:49:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:49:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:49:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:49:55,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:49:55,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:49:55,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:49:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:49:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:49:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:49:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:49:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:49:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:49:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:49:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:49:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:49:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:49:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:49:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:49:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:49:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:49:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:49:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:49:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:49:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:49:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:49:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:49:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:49:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:49:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:49:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:49:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:49:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:49:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:49:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:49:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:49:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:49:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:49:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:49:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:49:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:49:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:49:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:49:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:49:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:49:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:49:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:49:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:49:56,072 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:49:56,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:49:57,412 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:49:58,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:49:58,241 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:49:58,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:49:58 BoogieIcfgContainer [2023-04-02 23:49:58,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:49:58,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:49:58,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:49:58,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:49:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:49:54" (1/3) ... [2023-04-02 23:49:58,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348e6561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:49:58, skipping insertion in model container [2023-04-02 23:49:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:49:55" (2/3) ... [2023-04-02 23:49:58,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348e6561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:49:58, skipping insertion in model container [2023-04-02 23:49:58,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:49:58" (3/3) ... [2023-04-02 23:49:58,255 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2023-04-02 23:49:58,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:49:58,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:49:58,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:49:58,345 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e16fbbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:49:58,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:49:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 574 states, 335 states have (on average 1.4865671641791045) internal successors, (498), 362 states have internal predecessors, (498), 174 states have call successors, (174), 52 states have call predecessors, (174), 52 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2023-04-02 23:49:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 23:49:58,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:49:58,375 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:49:58,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:49:58,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:49:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1100631002, now seen corresponding path program 1 times [2023-04-02 23:49:58,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:49:58,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835198765] [2023-04-02 23:49:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:58,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:49:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:49:59,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:49:59,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835198765] [2023-04-02 23:49:59,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835198765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:49:59,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:49:59,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:49:59,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093396147] [2023-04-02 23:49:59,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:49:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:49:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:49:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:49:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:49:59,591 INFO L87 Difference]: Start difference. First operand has 574 states, 335 states have (on average 1.4865671641791045) internal successors, (498), 362 states have internal predecessors, (498), 174 states have call successors, (174), 52 states have call predecessors, (174), 52 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-02 23:50:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:03,187 INFO L93 Difference]: Finished difference Result 1415 states and 2165 transitions. [2023-04-02 23:50:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 23:50:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) Word has length 106 [2023-04-02 23:50:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:03,208 INFO L225 Difference]: With dead ends: 1415 [2023-04-02 23:50:03,208 INFO L226 Difference]: Without dead ends: 989 [2023-04-02 23:50:03,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:50:03,218 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1819 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 5308 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 5891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:03,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 938 Invalid, 5891 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [583 Valid, 5308 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-02 23:50:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2023-04-02 23:50:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 957. [2023-04-02 23:50:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 633 states have (on average 1.5545023696682465) internal successors, (984), 664 states have internal predecessors, (984), 236 states have call successors, (236), 86 states have call predecessors, (236), 87 states have return successors, (240), 230 states have call predecessors, (240), 228 states have call successors, (240) [2023-04-02 23:50:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1460 transitions. [2023-04-02 23:50:03,401 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1460 transitions. Word has length 106 [2023-04-02 23:50:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:03,401 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1460 transitions. [2023-04-02 23:50:03,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-02 23:50:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1460 transitions. [2023-04-02 23:50:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 23:50:03,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:03,408 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:03,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:50:03,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:03,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash 103476632, now seen corresponding path program 1 times [2023-04-02 23:50:03,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:03,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517214073] [2023-04-02 23:50:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:50:03,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:03,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517214073] [2023-04-02 23:50:03,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517214073] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:03,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:03,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:50:03,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148980867] [2023-04-02 23:50:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:03,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:03,732 INFO L87 Difference]: Start difference. First operand 957 states and 1460 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-02 23:50:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:03,933 INFO L93 Difference]: Finished difference Result 1530 states and 2349 transitions. [2023-04-02 23:50:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:50:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 111 [2023-04-02 23:50:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:03,941 INFO L225 Difference]: With dead ends: 1530 [2023-04-02 23:50:03,941 INFO L226 Difference]: Without dead ends: 994 [2023-04-02 23:50:03,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:03,944 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 7 mSDsluCounter, 3059 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3679 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:03,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3679 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2023-04-02 23:50:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 978. [2023-04-02 23:50:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 648 states have (on average 1.5416666666666667) internal successors, (999), 679 states have internal predecessors, (999), 236 states have call successors, (236), 86 states have call predecessors, (236), 93 states have return successors, (255), 236 states have call predecessors, (255), 228 states have call successors, (255) [2023-04-02 23:50:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1490 transitions. [2023-04-02 23:50:04,000 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1490 transitions. Word has length 111 [2023-04-02 23:50:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:04,001 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 1490 transitions. [2023-04-02 23:50:04,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-02 23:50:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1490 transitions. [2023-04-02 23:50:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:50:04,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:04,004 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:50:04,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:04,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash -688765670, now seen corresponding path program 1 times [2023-04-02 23:50:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272481252] [2023-04-02 23:50:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:50:04,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:04,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272481252] [2023-04-02 23:50:04,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272481252] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:04,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:04,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:50:04,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262585490] [2023-04-02 23:50:04,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:04,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:04,324 INFO L87 Difference]: Start difference. First operand 978 states and 1490 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-02 23:50:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:04,517 INFO L93 Difference]: Finished difference Result 1559 states and 2387 transitions. [2023-04-02 23:50:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:50:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-04-02 23:50:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:04,525 INFO L225 Difference]: With dead ends: 1559 [2023-04-02 23:50:04,525 INFO L226 Difference]: Without dead ends: 1009 [2023-04-02 23:50:04,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:04,529 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 6 mSDsluCounter, 3078 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3703 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:04,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3703 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2023-04-02 23:50:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 981. [2023-04-02 23:50:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 651 states have (on average 1.5391705069124424) internal successors, (1002), 679 states have internal predecessors, (1002), 236 states have call successors, (236), 86 states have call predecessors, (236), 93 states have return successors, (255), 239 states have call predecessors, (255), 228 states have call successors, (255) [2023-04-02 23:50:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1493 transitions. [2023-04-02 23:50:04,585 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1493 transitions. Word has length 112 [2023-04-02 23:50:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:04,585 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1493 transitions. [2023-04-02 23:50:04,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-02 23:50:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1493 transitions. [2023-04-02 23:50:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:50:04,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:04,588 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:04,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:50:04,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:04,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 777855802, now seen corresponding path program 1 times [2023-04-02 23:50:04,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:04,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258646614] [2023-04-02 23:50:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:50:04,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:04,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258646614] [2023-04-02 23:50:04,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258646614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:04,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:04,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:50:04,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210897502] [2023-04-02 23:50:04,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:04,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:04,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:04,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:04,870 INFO L87 Difference]: Start difference. First operand 981 states and 1493 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-02 23:50:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:05,108 INFO L93 Difference]: Finished difference Result 1564 states and 2392 transitions. [2023-04-02 23:50:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:50:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-04-02 23:50:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:05,115 INFO L225 Difference]: With dead ends: 1564 [2023-04-02 23:50:05,115 INFO L226 Difference]: Without dead ends: 1012 [2023-04-02 23:50:05,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:05,119 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 6 mSDsluCounter, 3078 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3703 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:05,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3703 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-04-02 23:50:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 984. [2023-04-02 23:50:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 654 states have (on average 1.536697247706422) internal successors, (1005), 679 states have internal predecessors, (1005), 236 states have call successors, (236), 86 states have call predecessors, (236), 93 states have return successors, (255), 242 states have call predecessors, (255), 228 states have call successors, (255) [2023-04-02 23:50:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1496 transitions. [2023-04-02 23:50:05,169 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1496 transitions. Word has length 112 [2023-04-02 23:50:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:05,170 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1496 transitions. [2023-04-02 23:50:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-02 23:50:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1496 transitions. [2023-04-02 23:50:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-02 23:50:05,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:05,173 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:50:05,174 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:05,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2140000194, now seen corresponding path program 1 times [2023-04-02 23:50:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:05,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028903582] [2023-04-02 23:50:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:50:05,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:05,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028903582] [2023-04-02 23:50:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028903582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:05,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:50:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878591134] [2023-04-02 23:50:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:05,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:50:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:50:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:50:05,653 INFO L87 Difference]: Start difference. First operand 984 states and 1496 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-02 23:50:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:08,280 INFO L93 Difference]: Finished difference Result 2108 states and 3225 transitions. [2023-04-02 23:50:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:50:08,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) Word has length 116 [2023-04-02 23:50:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:08,295 INFO L225 Difference]: With dead ends: 2108 [2023-04-02 23:50:08,295 INFO L226 Difference]: Without dead ends: 1429 [2023-04-02 23:50:08,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:08,303 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 3649 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2852 mSolverCounterSat, 1627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3833 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 4479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1627 IncrementalHoareTripleChecker+Valid, 2852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:08,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3833 Valid, 355 Invalid, 4479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1627 Valid, 2852 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 23:50:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2023-04-02 23:50:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1379. [2023-04-02 23:50:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 899 states have (on average 1.4905450500556174) internal successors, (1340), 939 states have internal predecessors, (1340), 340 states have call successors, (340), 128 states have call predecessors, (340), 139 states have return successors, (377), 347 states have call predecessors, (377), 332 states have call successors, (377) [2023-04-02 23:50:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2057 transitions. [2023-04-02 23:50:08,441 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2057 transitions. Word has length 116 [2023-04-02 23:50:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:08,442 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 2057 transitions. [2023-04-02 23:50:08,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-02 23:50:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2057 transitions. [2023-04-02 23:50:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 23:50:08,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:08,451 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:08,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:50:08,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:08,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash -868288375, now seen corresponding path program 1 times [2023-04-02 23:50:08,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:08,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174447576] [2023-04-02 23:50:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:08,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:50:08,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:08,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174447576] [2023-04-02 23:50:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174447576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:08,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:08,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:50:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079838950] [2023-04-02 23:50:08,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:50:08,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:08,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:50:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:08,830 INFO L87 Difference]: Start difference. First operand 1379 states and 2057 transitions. Second operand has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:50:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:09,254 INFO L93 Difference]: Finished difference Result 2681 states and 4102 transitions. [2023-04-02 23:50:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:50:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 119 [2023-04-02 23:50:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:09,265 INFO L225 Difference]: With dead ends: 2681 [2023-04-02 23:50:09,265 INFO L226 Difference]: Without dead ends: 1583 [2023-04-02 23:50:09,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:50:09,274 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 230 mSDsluCounter, 4287 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 4941 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:09,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 4941 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:50:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2023-04-02 23:50:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1583. [2023-04-02 23:50:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1087 states have (on average 1.5032198712051519) internal successors, (1634), 1133 states have internal predecessors, (1634), 345 states have call successors, (345), 133 states have call predecessors, (345), 150 states have return successors, (382), 352 states have call predecessors, (382), 337 states have call successors, (382) [2023-04-02 23:50:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2361 transitions. [2023-04-02 23:50:09,381 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2361 transitions. Word has length 119 [2023-04-02 23:50:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:09,381 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2361 transitions. [2023-04-02 23:50:09,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:50:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2361 transitions. [2023-04-02 23:50:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 23:50:09,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:09,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:09,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:50:09,386 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:09,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1664537376, now seen corresponding path program 1 times [2023-04-02 23:50:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:09,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707180611] [2023-04-02 23:50:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:50:09,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707180611] [2023-04-02 23:50:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707180611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:09,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:09,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:50:09,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523108346] [2023-04-02 23:50:09,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:09,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:09,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:09,827 INFO L87 Difference]: Start difference. First operand 1583 states and 2361 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:50:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:11,983 INFO L93 Difference]: Finished difference Result 2817 states and 4226 transitions. [2023-04-02 23:50:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:50:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 120 [2023-04-02 23:50:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:11,991 INFO L225 Difference]: With dead ends: 2817 [2023-04-02 23:50:11,992 INFO L226 Difference]: Without dead ends: 1653 [2023-04-02 23:50:11,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:50:11,996 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1065 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 3762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:11,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 519 Invalid, 3762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3344 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 23:50:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2023-04-02 23:50:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1610. [2023-04-02 23:50:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1105 states have (on average 1.4986425339366516) internal successors, (1656), 1155 states have internal predecessors, (1656), 346 states have call successors, (346), 138 states have call predecessors, (346), 158 states have return successors, (393), 352 states have call predecessors, (393), 338 states have call successors, (393) [2023-04-02 23:50:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2395 transitions. [2023-04-02 23:50:12,080 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2395 transitions. Word has length 120 [2023-04-02 23:50:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:12,081 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2395 transitions. [2023-04-02 23:50:12,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-02 23:50:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2395 transitions. [2023-04-02 23:50:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 23:50:12,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:12,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:12,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:50:12,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:12,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:12,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1705752557, now seen corresponding path program 1 times [2023-04-02 23:50:12,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:12,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768973967] [2023-04-02 23:50:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:12,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:50:12,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768973967] [2023-04-02 23:50:12,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768973967] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:12,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:12,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:50:12,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850291803] [2023-04-02 23:50:12,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:50:12,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:50:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:12,353 INFO L87 Difference]: Start difference. First operand 1610 states and 2395 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:50:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:12,937 INFO L93 Difference]: Finished difference Result 1650 states and 2452 transitions. [2023-04-02 23:50:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 125 [2023-04-02 23:50:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:12,946 INFO L225 Difference]: With dead ends: 1650 [2023-04-02 23:50:12,946 INFO L226 Difference]: Without dead ends: 1633 [2023-04-02 23:50:12,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:50:12,947 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 664 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:12,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 1998 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:50:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2023-04-02 23:50:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1614. [2023-04-02 23:50:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1109 states have (on average 1.496844003606853) internal successors, (1660), 1159 states have internal predecessors, (1660), 346 states have call successors, (346), 138 states have call predecessors, (346), 158 states have return successors, (393), 352 states have call predecessors, (393), 338 states have call successors, (393) [2023-04-02 23:50:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2399 transitions. [2023-04-02 23:50:13,077 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2399 transitions. Word has length 125 [2023-04-02 23:50:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:13,078 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2399 transitions. [2023-04-02 23:50:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:50:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2399 transitions. [2023-04-02 23:50:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 23:50:13,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:13,081 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:50:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:50:13,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:13,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash -584628067, now seen corresponding path program 1 times [2023-04-02 23:50:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942946342] [2023-04-02 23:50:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:13,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:50:13,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:13,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942946342] [2023-04-02 23:50:13,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942946342] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:13,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:13,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:50:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569566258] [2023-04-02 23:50:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:13,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:50:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:50:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:50:13,434 INFO L87 Difference]: Start difference. First operand 1614 states and 2399 transitions. Second operand has 8 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-02 23:50:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:13,664 INFO L93 Difference]: Finished difference Result 1635 states and 2425 transitions. [2023-04-02 23:50:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:50:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 129 [2023-04-02 23:50:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:13,673 INFO L225 Difference]: With dead ends: 1635 [2023-04-02 23:50:13,674 INFO L226 Difference]: Without dead ends: 1618 [2023-04-02 23:50:13,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:13,677 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 10 mSDsluCounter, 3677 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:13,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4293 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2023-04-02 23:50:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1614. [2023-04-02 23:50:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1109 states have (on average 1.4941388638412985) internal successors, (1657), 1159 states have internal predecessors, (1657), 346 states have call successors, (346), 138 states have call predecessors, (346), 158 states have return successors, (393), 352 states have call predecessors, (393), 338 states have call successors, (393) [2023-04-02 23:50:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2396 transitions. [2023-04-02 23:50:13,819 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2396 transitions. Word has length 129 [2023-04-02 23:50:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:13,821 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2396 transitions. [2023-04-02 23:50:13,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-02 23:50:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2396 transitions. [2023-04-02 23:50:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-02 23:50:13,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:13,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:50:13,825 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:13,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash 216397537, now seen corresponding path program 1 times [2023-04-02 23:50:13,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:13,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535456885] [2023-04-02 23:50:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:50:14,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535456885] [2023-04-02 23:50:14,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535456885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:14,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:14,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990559971] [2023-04-02 23:50:14,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:14,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:14,185 INFO L87 Difference]: Start difference. First operand 1614 states and 2396 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:15,636 INFO L93 Difference]: Finished difference Result 4865 states and 7356 transitions. [2023-04-02 23:50:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-04-02 23:50:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:15,689 INFO L225 Difference]: With dead ends: 4865 [2023-04-02 23:50:15,689 INFO L226 Difference]: Without dead ends: 3293 [2023-04-02 23:50:15,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:15,697 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1229 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:15,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1307 Valid, 507 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:50:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2023-04-02 23:50:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3148. [2023-04-02 23:50:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 2193 states have (on average 1.5020519835841313) internal successors, (3294), 2292 states have internal predecessors, (3294), 648 states have call successors, (648), 249 states have call predecessors, (648), 306 states have return successors, (794), 657 states have call predecessors, (794), 639 states have call successors, (794) [2023-04-02 23:50:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 4736 transitions. [2023-04-02 23:50:15,920 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 4736 transitions. Word has length 145 [2023-04-02 23:50:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:15,920 INFO L495 AbstractCegarLoop]: Abstraction has 3148 states and 4736 transitions. [2023-04-02 23:50:15,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 4736 transitions. [2023-04-02 23:50:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-02 23:50:15,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:15,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:15,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:50:15,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:15,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash -434382132, now seen corresponding path program 1 times [2023-04-02 23:50:15,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:15,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045855088] [2023-04-02 23:50:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:15,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:50:16,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045855088] [2023-04-02 23:50:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045855088] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:16,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:16,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:16,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240908759] [2023-04-02 23:50:16,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:16,251 INFO L87 Difference]: Start difference. First operand 3148 states and 4736 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:17,883 INFO L93 Difference]: Finished difference Result 9387 states and 14375 transitions. [2023-04-02 23:50:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:17,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-04-02 23:50:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:17,928 INFO L225 Difference]: With dead ends: 9387 [2023-04-02 23:50:17,928 INFO L226 Difference]: Without dead ends: 6284 [2023-04-02 23:50:17,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:17,950 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1226 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:17,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 512 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:50:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2023-04-02 23:50:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 6106. [2023-04-02 23:50:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6106 states, 4299 states have (on average 1.5052337752965805) internal successors, (6471), 4499 states have internal predecessors, (6471), 1201 states have call successors, (1201), 471 states have call predecessors, (1201), 605 states have return successors, (1610), 1222 states have call predecessors, (1610), 1190 states have call successors, (1610) [2023-04-02 23:50:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 9282 transitions. [2023-04-02 23:50:18,451 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 9282 transitions. Word has length 145 [2023-04-02 23:50:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:18,452 INFO L495 AbstractCegarLoop]: Abstraction has 6106 states and 9282 transitions. [2023-04-02 23:50:18,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 9282 transitions. [2023-04-02 23:50:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:50:18,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:18,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:18,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:50:18,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:18,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1757748099, now seen corresponding path program 1 times [2023-04-02 23:50:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:18,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525680732] [2023-04-02 23:50:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:18,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:50:18,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:18,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525680732] [2023-04-02 23:50:18,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525680732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:18,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:18,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842465669] [2023-04-02 23:50:18,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:18,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:18,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:18,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:18,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:18,842 INFO L87 Difference]: Start difference. First operand 6106 states and 9282 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:20,715 INFO L93 Difference]: Finished difference Result 18339 states and 28605 transitions. [2023-04-02 23:50:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-02 23:50:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:20,792 INFO L225 Difference]: With dead ends: 18339 [2023-04-02 23:50:20,792 INFO L226 Difference]: Without dead ends: 12284 [2023-04-02 23:50:20,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:20,827 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1223 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:20,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 517 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:50:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12284 states. [2023-04-02 23:50:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12284 to 12041. [2023-04-02 23:50:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12041 states, 8518 states have (on average 1.5051655318149801) internal successors, (12821), 8926 states have internal predecessors, (12821), 2301 states have call successors, (2301), 915 states have call predecessors, (2301), 1221 states have return successors, (3470), 2358 states have call predecessors, (3470), 2286 states have call successors, (3470) [2023-04-02 23:50:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12041 states to 12041 states and 18592 transitions. [2023-04-02 23:50:21,928 INFO L78 Accepts]: Start accepts. Automaton has 12041 states and 18592 transitions. Word has length 147 [2023-04-02 23:50:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:21,929 INFO L495 AbstractCegarLoop]: Abstraction has 12041 states and 18592 transitions. [2023-04-02 23:50:21,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 12041 states and 18592 transitions. [2023-04-02 23:50:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:50:21,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:21,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:21,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 23:50:21,934 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:21,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash -871130898, now seen corresponding path program 1 times [2023-04-02 23:50:21,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:21,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81882888] [2023-04-02 23:50:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:21,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:50:22,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:22,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81882888] [2023-04-02 23:50:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81882888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:22,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:22,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043490906] [2023-04-02 23:50:22,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:22,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:22,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:22,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:22,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:22,256 INFO L87 Difference]: Start difference. First operand 12041 states and 18592 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:24,850 INFO L93 Difference]: Finished difference Result 36298 states and 58394 transitions. [2023-04-02 23:50:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:24,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-02 23:50:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:24,992 INFO L225 Difference]: With dead ends: 36298 [2023-04-02 23:50:24,992 INFO L226 Difference]: Without dead ends: 24320 [2023-04-02 23:50:25,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:25,049 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1220 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:25,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 522 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:50:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24320 states. [2023-04-02 23:50:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24320 to 23948. [2023-04-02 23:50:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23948 states, 16969 states have (on average 1.5033885320289941) internal successors, (25511), 17805 states have internal predecessors, (25511), 4489 states have call successors, (4489), 1803 states have call predecessors, (4489), 2489 states have return successors, (7958), 4642 states have call predecessors, (7958), 4466 states have call successors, (7958) [2023-04-02 23:50:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23948 states to 23948 states and 37958 transitions. [2023-04-02 23:50:27,246 INFO L78 Accepts]: Start accepts. Automaton has 23948 states and 37958 transitions. Word has length 147 [2023-04-02 23:50:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:27,247 INFO L495 AbstractCegarLoop]: Abstraction has 23948 states and 37958 transitions. [2023-04-02 23:50:27,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23948 states and 37958 transitions. [2023-04-02 23:50:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-02 23:50:27,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:27,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:27,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 23:50:27,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:27,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1236550427, now seen corresponding path program 1 times [2023-04-02 23:50:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:27,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038714239] [2023-04-02 23:50:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:50:27,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038714239] [2023-04-02 23:50:27,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038714239] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:27,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:27,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674306562] [2023-04-02 23:50:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:27,561 INFO L87 Difference]: Start difference. First operand 23948 states and 37958 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:31,897 INFO L93 Difference]: Finished difference Result 72367 states and 122627 transitions. [2023-04-02 23:50:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:31,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 148 [2023-04-02 23:50:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:32,227 INFO L225 Difference]: With dead ends: 72367 [2023-04-02 23:50:32,227 INFO L226 Difference]: Without dead ends: 48494 [2023-04-02 23:50:32,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:32,345 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1218 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:32,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 528 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:50:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48494 states. [2023-04-02 23:50:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48494 to 47587. [2023-04-02 23:50:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47587 states, 33792 states have (on average 1.5034031723484849) internal successors, (50803), 35463 states have internal predecessors, (50803), 8840 states have call successors, (8840), 3575 states have call predecessors, (8840), 4954 states have return successors, (18513), 9139 states have call predecessors, (18513), 8802 states have call successors, (18513) [2023-04-02 23:50:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47587 states to 47587 states and 78156 transitions. [2023-04-02 23:50:36,873 INFO L78 Accepts]: Start accepts. Automaton has 47587 states and 78156 transitions. Word has length 148 [2023-04-02 23:50:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:36,874 INFO L495 AbstractCegarLoop]: Abstraction has 47587 states and 78156 transitions. [2023-04-02 23:50:36,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-02 23:50:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 47587 states and 78156 transitions. [2023-04-02 23:50:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-04-02 23:50:36,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:36,887 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:36,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 23:50:36,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:36,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:36,888 INFO L85 PathProgramCache]: Analyzing trace with hash -609829363, now seen corresponding path program 1 times [2023-04-02 23:50:36,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:36,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155587368] [2023-04-02 23:50:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 23:50:37,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155587368] [2023-04-02 23:50:37,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155587368] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122205149] [2023-04-02 23:50:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:37,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:37,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:50:37,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:50:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:37,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 3132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:37,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 23:50:37,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:37,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122205149] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:37,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:37,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:50:37,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080905125] [2023-04-02 23:50:37,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:37,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:37,904 INFO L87 Difference]: Start difference. First operand 47587 states and 78156 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:50:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:41,642 INFO L93 Difference]: Finished difference Result 98875 states and 167866 transitions. [2023-04-02 23:50:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 196 [2023-04-02 23:50:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:41,899 INFO L225 Difference]: With dead ends: 98875 [2023-04-02 23:50:41,899 INFO L226 Difference]: Without dead ends: 51331 [2023-04-02 23:50:42,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:50:42,054 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 213 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:42,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1626 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:50:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51331 states. [2023-04-02 23:50:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51331 to 51331. [2023-04-02 23:50:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51331 states, 37440 states have (on average 1.5440972222222222) internal successors, (57811), 39111 states have internal predecessors, (57811), 8840 states have call successors, (8840), 3671 states have call predecessors, (8840), 5050 states have return successors, (18513), 9139 states have call predecessors, (18513), 8802 states have call successors, (18513) [2023-04-02 23:50:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51331 states to 51331 states and 85164 transitions. [2023-04-02 23:50:46,214 INFO L78 Accepts]: Start accepts. Automaton has 51331 states and 85164 transitions. Word has length 196 [2023-04-02 23:50:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:46,215 INFO L495 AbstractCegarLoop]: Abstraction has 51331 states and 85164 transitions. [2023-04-02 23:50:46,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:50:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 51331 states and 85164 transitions. [2023-04-02 23:50:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-02 23:50:46,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:46,228 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:46,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:50:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 23:50:46,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:46,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash 336359490, now seen corresponding path program 1 times [2023-04-02 23:50:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:46,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415181404] [2023-04-02 23:50:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-02 23:50:48,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:48,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415181404] [2023-04-02 23:50:48,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415181404] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:48,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781535457] [2023-04-02 23:50:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:48,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:48,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:50:48,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:50:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:48,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:48,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:50:48,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:48,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781535457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-02 23:50:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862053030] [2023-04-02 23:50:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:50:48,844 INFO L87 Difference]: Start difference. First operand 51331 states and 85164 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:50:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:52,400 INFO L93 Difference]: Finished difference Result 106363 states and 181783 transitions. [2023-04-02 23:50:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 201 [2023-04-02 23:50:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:52,688 INFO L225 Difference]: With dead ends: 106363 [2023-04-02 23:50:52,689 INFO L226 Difference]: Without dead ends: 55075 [2023-04-02 23:50:52,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:50:52,840 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 211 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:52,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1626 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:50:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55075 states. [2023-04-02 23:50:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55075 to 55075. [2023-04-02 23:50:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55075 states, 41088 states have (on average 1.577565225856698) internal successors, (64819), 42759 states have internal predecessors, (64819), 8840 states have call successors, (8840), 3767 states have call predecessors, (8840), 5146 states have return successors, (18513), 9139 states have call predecessors, (18513), 8802 states have call successors, (18513) [2023-04-02 23:50:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55075 states to 55075 states and 92172 transitions. [2023-04-02 23:50:56,811 INFO L78 Accepts]: Start accepts. Automaton has 55075 states and 92172 transitions. Word has length 201 [2023-04-02 23:50:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:56,812 INFO L495 AbstractCegarLoop]: Abstraction has 55075 states and 92172 transitions. [2023-04-02 23:50:56,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:50:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 55075 states and 92172 transitions. [2023-04-02 23:50:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-04-02 23:50:56,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:56,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:56,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:50:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 23:50:57,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:57,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2025895086, now seen corresponding path program 1 times [2023-04-02 23:50:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:57,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131868213] [2023-04-02 23:50:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:50:58,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131868213] [2023-04-02 23:50:58,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131868213] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58239038] [2023-04-02 23:50:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:58,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:58,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:58,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:50:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:50:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:59,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:50:59,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:50:59,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58239038] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:59,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:59,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-02 23:50:59,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121019893] [2023-04-02 23:50:59,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:59,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:59,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:59,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:50:59,215 INFO L87 Difference]: Start difference. First operand 55075 states and 92172 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:51:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:02,532 INFO L93 Difference]: Finished difference Result 113851 states and 195700 transitions. [2023-04-02 23:51:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:51:02,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 205 [2023-04-02 23:51:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:02,806 INFO L225 Difference]: With dead ends: 113851 [2023-04-02 23:51:02,806 INFO L226 Difference]: Without dead ends: 58819 [2023-04-02 23:51:02,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:51:02,957 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 209 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:02,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1626 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:51:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58819 states. [2023-04-02 23:51:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58819 to 58819. [2023-04-02 23:51:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58819 states, 44736 states have (on average 1.6055749284692418) internal successors, (71827), 46407 states have internal predecessors, (71827), 8840 states have call successors, (8840), 3863 states have call predecessors, (8840), 5242 states have return successors, (18513), 9139 states have call predecessors, (18513), 8802 states have call successors, (18513) [2023-04-02 23:51:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58819 states to 58819 states and 99180 transitions. [2023-04-02 23:51:06,849 INFO L78 Accepts]: Start accepts. Automaton has 58819 states and 99180 transitions. Word has length 205 [2023-04-02 23:51:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:06,850 INFO L495 AbstractCegarLoop]: Abstraction has 58819 states and 99180 transitions. [2023-04-02 23:51:06,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:51:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 58819 states and 99180 transitions. [2023-04-02 23:51:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-02 23:51:06,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:06,862 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:51:06,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:51:07,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:07,074 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:07,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1485658749, now seen corresponding path program 1 times [2023-04-02 23:51:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:07,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466804879] [2023-04-02 23:51:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 23:51:08,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466804879] [2023-04-02 23:51:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466804879] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428442032] [2023-04-02 23:51:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:08,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:08,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:51:08,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:51:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:09,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 3144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:51:09,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 23:51:09,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:09,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428442032] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:09,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:09,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-02 23:51:09,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057072349] [2023-04-02 23:51:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:09,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:51:09,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:51:09,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:51:09,291 INFO L87 Difference]: Start difference. First operand 58819 states and 99180 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:51:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:12,787 INFO L93 Difference]: Finished difference Result 121339 states and 209617 transitions. [2023-04-02 23:51:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:51:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 208 [2023-04-02 23:51:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:13,053 INFO L225 Difference]: With dead ends: 121339 [2023-04-02 23:51:13,053 INFO L226 Difference]: Without dead ends: 62563 [2023-04-02 23:51:13,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:51:13,181 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 207 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:13,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1626 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:51:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62563 states. [2023-04-02 23:51:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62563 to 62563. [2023-04-02 23:51:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62563 states, 48384 states have (on average 1.6293609457671958) internal successors, (78835), 50055 states have internal predecessors, (78835), 8840 states have call successors, (8840), 3959 states have call predecessors, (8840), 5338 states have return successors, (18513), 9139 states have call predecessors, (18513), 8802 states have call successors, (18513) [2023-04-02 23:51:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62563 states to 62563 states and 106188 transitions. [2023-04-02 23:51:16,962 INFO L78 Accepts]: Start accepts. Automaton has 62563 states and 106188 transitions. Word has length 208 [2023-04-02 23:51:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:16,963 INFO L495 AbstractCegarLoop]: Abstraction has 62563 states and 106188 transitions. [2023-04-02 23:51:16,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-04-02 23:51:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 62563 states and 106188 transitions. [2023-04-02 23:51:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-02 23:51:16,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:16,972 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:51:16,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:51:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 23:51:17,185 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:17,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:17,185 INFO L85 PathProgramCache]: Analyzing trace with hash 997844469, now seen corresponding path program 1 times [2023-04-02 23:51:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:17,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502760084] [2023-04-02 23:51:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:17,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-04-02 23:51:18,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502760084] [2023-04-02 23:51:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502760084] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599750101] [2023-04-02 23:51:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:18,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:18,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:18,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:51:18,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:51:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:18,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 3140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 23:51:18,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:51:19,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:51:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-02 23:51:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599750101] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:21,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:51:21,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [19, 8] total 30 [2023-04-02 23:51:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545690078] [2023-04-02 23:51:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:21,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:51:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:51:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:51:21,158 INFO L87 Difference]: Start difference. First operand 62563 states and 106188 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 6 states have call successors, (43), 4 states have call predecessors, (43), 4 states have return successors, (39), 6 states have call predecessors, (39), 5 states have call successors, (39) [2023-04-02 23:51:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:34,317 INFO L93 Difference]: Finished difference Result 195207 states and 342554 transitions. [2023-04-02 23:51:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:51:34,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 6 states have call successors, (43), 4 states have call predecessors, (43), 4 states have return successors, (39), 6 states have call predecessors, (39), 5 states have call successors, (39) Word has length 210 [2023-04-02 23:51:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:35,065 INFO L225 Difference]: With dead ends: 195207 [2023-04-02 23:51:35,065 INFO L226 Difference]: Without dead ends: 132686 [2023-04-02 23:51:35,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 23:51:35,422 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 2598 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2715 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:35,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2715 Valid, 1443 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 23:51:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132686 states.