/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_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:47:50,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:47:50,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:47:50,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:47:50,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:47:50,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:47:50,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:47:50,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:47:50,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:47:50,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:47:50,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:47:50,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:47:50,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:47:50,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:47:50,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:47:50,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:47:50,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:47:50,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:47:50,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:47:50,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:47:50,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:47:50,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:47:50,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:47:50,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:47:50,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:47:50,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:47:50,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:47:50,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:47:50,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:47:50,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:47:50,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:47:50,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:47:50,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:47:50,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:47:50,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:47:50,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:47:50,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:47:50,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:47:50,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:47:50,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:47:50,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:47:50,115 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 23:47:50,152 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:47:50,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:47:50,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:47:50,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:47:50,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:47:50,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:47:50,154 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:47:50,154 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:47:50,154 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:47:50,154 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:47:50,155 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:47:50,155 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:47:50,155 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:47:50,155 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:47:50,155 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:47:50,156 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:47:50,156 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:47:50,156 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:47:50,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:47:50,156 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:47:50,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:47:50,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:47:50,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:47:50,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:47:50,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:47:50,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:47:50,158 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:47:50,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:47:50,158 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:47:50,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:47:50,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:47:50,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:47:50,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:47:50,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:47:50,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:47:50,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:47:50,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:47:50,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:47:50,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:47:50,342 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:47:50,343 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:47:50,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c [2023-04-02 23:47:51,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:47:51,957 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:47:51,958 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c [2023-04-02 23:47:51,987 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9effdd814/25ad8a86498b48399b7f8421f2cf0630/FLAG523b35eba [2023-04-02 23:47:52,001 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9effdd814/25ad8a86498b48399b7f8421f2cf0630 [2023-04-02 23:47:52,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:47:52,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:47:52,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:47:52,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:47:52,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:47:52,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f78ae98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52, skipping insertion in model container [2023-04-02 23:47:52,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:47:52,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:47:52,439 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_product19.cil.c[34453,34466] [2023-04-02 23:47:52,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:47:52,612 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:47:52,673 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_product19.cil.c[34453,34466] [2023-04-02 23:47:52,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:47:52,772 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:47:52,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52 WrapperNode [2023-04-02 23:47:52,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:47:52,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:47:52,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:47:52,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:47:52,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,918 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:47:52,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:47:52,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:47:52,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:47:52,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (1/1) ... [2023-04-02 23:47:52,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:47:52,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:52,985 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 23:47:53,000 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 23:47:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:47:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:47:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:47:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:47:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:47:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:47:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:47:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:47:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:47:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:47:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:47:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:47:53,037 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:47:53,038 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:47:53,039 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:47:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:47:53,041 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:47:53,041 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-02 23:47:53,041 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:47:53,041 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:47:53,041 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-02 23:47:53,041 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:47:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:47:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:47:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:47:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:47:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:47:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:47:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:47:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:47:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:47:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:47:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:47:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:47:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:47:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:47:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:47:53,049 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:47:53,049 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:47:53,049 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:47:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:47:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:47:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:47:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:47:53,050 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:47:53,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:47:53,052 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:47:53,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:47:53,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:47:53,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:47:53,344 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:47:53,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:47:54,415 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:47:55,181 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:47:55,181 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:47:55,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:47:55 BoogieIcfgContainer [2023-04-02 23:47:55,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:47:55,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:47:55,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:47:55,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:47:55,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:47:52" (1/3) ... [2023-04-02 23:47:55,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d504837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:47:55, skipping insertion in model container [2023-04-02 23:47:55,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:47:52" (2/3) ... [2023-04-02 23:47:55,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d504837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:47:55, skipping insertion in model container [2023-04-02 23:47:55,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:47:55" (3/3) ... [2023-04-02 23:47:55,193 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product19.cil.c [2023-04-02 23:47:55,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:47:55,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:47:55,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:47:55,262 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;@5bcff49c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:47:55,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:47:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 569 states, 333 states have (on average 1.4894894894894894) internal successors, (496), 360 states have internal predecessors, (496), 173 states have call successors, (173), 50 states have call predecessors, (173), 50 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2023-04-02 23:47:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:47:55,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:55,286 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:47:55,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:55,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:55,290 INFO L85 PathProgramCache]: Analyzing trace with hash 669960280, now seen corresponding path program 1 times [2023-04-02 23:47:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841312432] [2023-04-02 23:47:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:55,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:47:55,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:55,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841312432] [2023-04-02 23:47:55,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841312432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:55,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:47:55,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:47:55,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366838797] [2023-04-02 23:47:55,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:47:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:47:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:47:55,834 INFO L87 Difference]: Start difference. First operand has 569 states, 333 states have (on average 1.4894894894894894) internal successors, (496), 360 states have internal predecessors, (496), 173 states have call successors, (173), 50 states have call predecessors, (173), 50 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-04-02 23:47:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:55,986 INFO L93 Difference]: Finished difference Result 472 states and 703 transitions. [2023-04-02 23:47:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:47:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 112 [2023-04-02 23:47:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:56,010 INFO L225 Difference]: With dead ends: 472 [2023-04-02 23:47:56,010 INFO L226 Difference]: Without dead ends: 438 [2023-04-02 23:47:56,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:47:56,022 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:56,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 624 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:47:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-04-02 23:47:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2023-04-02 23:47:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 277 states have (on average 1.5306859205776173) internal successors, (424), 296 states have internal predecessors, (424), 118 states have call successors, (118), 46 states have call predecessors, (118), 42 states have return successors, (110), 107 states have call predecessors, (110), 110 states have call successors, (110) [2023-04-02 23:47:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 652 transitions. [2023-04-02 23:47:56,117 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 652 transitions. Word has length 112 [2023-04-02 23:47:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:56,119 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 652 transitions. [2023-04-02 23:47:56,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-04-02 23:47:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 652 transitions. [2023-04-02 23:47:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:47:56,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:56,125 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:47:56,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:47:56,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:56,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:56,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1493189183, now seen corresponding path program 1 times [2023-04-02 23:47:56,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:56,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776877641] [2023-04-02 23:47:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:56,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:47:56,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776877641] [2023-04-02 23:47:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776877641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:56,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:47:56,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:47:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466037879] [2023-04-02 23:47:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:56,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:47:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:47:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:47:56,854 INFO L87 Difference]: Start difference. First operand 438 states and 652 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:47:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:59,212 INFO L93 Difference]: Finished difference Result 1241 states and 1893 transitions. [2023-04-02 23:47:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:47:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 113 [2023-04-02 23:47:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:59,219 INFO L225 Difference]: With dead ends: 1241 [2023-04-02 23:47:59,219 INFO L226 Difference]: Without dead ends: 845 [2023-04-02 23:47:59,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:47:59,223 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1220 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3300 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 3300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:59,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 502 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 3300 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 23:47:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-04-02 23:47:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 820. [2023-04-02 23:47:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 531 states have (on average 1.5461393596986817) internal successors, (821), 564 states have internal predecessors, (821), 214 states have call successors, (214), 77 states have call predecessors, (214), 74 states have return successors, (212), 202 states have call predecessors, (212), 206 states have call successors, (212) [2023-04-02 23:47:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1247 transitions. [2023-04-02 23:47:59,282 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1247 transitions. Word has length 113 [2023-04-02 23:47:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:59,283 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1247 transitions. [2023-04-02 23:47:59,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:47:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1247 transitions. [2023-04-02 23:47:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 23:47:59,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:59,286 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:47:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:47:59,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:59,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash -867764656, now seen corresponding path program 1 times [2023-04-02 23:47:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527402800] [2023-04-02 23:47:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:47:59,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:59,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527402800] [2023-04-02 23:47:59,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527402800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:59,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:47:59,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:47:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886441035] [2023-04-02 23:47:59,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:47:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:47:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:59,626 INFO L87 Difference]: Start difference. First operand 820 states and 1247 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:48:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:00,190 INFO L93 Difference]: Finished difference Result 859 states and 1303 transitions. [2023-04-02 23:48:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:00,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2023-04-02 23:48:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:00,198 INFO L225 Difference]: With dead ends: 859 [2023-04-02 23:48:00,198 INFO L226 Difference]: Without dead ends: 842 [2023-04-02 23:48:00,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:48:00,199 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 669 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:00,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1994 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:48:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-04-02 23:48:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 824. [2023-04-02 23:48:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 535 states have (on average 1.5420560747663552) internal successors, (825), 568 states have internal predecessors, (825), 214 states have call successors, (214), 77 states have call predecessors, (214), 74 states have return successors, (212), 202 states have call predecessors, (212), 206 states have call successors, (212) [2023-04-02 23:48:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1251 transitions. [2023-04-02 23:48:00,240 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1251 transitions. Word has length 117 [2023-04-02 23:48:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:00,240 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1251 transitions. [2023-04-02 23:48:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:48:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1251 transitions. [2023-04-02 23:48:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:48:00,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:00,243 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:48:00,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:48:00,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:00,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1004962158, now seen corresponding path program 1 times [2023-04-02 23:48:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:00,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341801363] [2023-04-02 23:48:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:48:00,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:00,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341801363] [2023-04-02 23:48:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341801363] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:00,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:48:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223775432] [2023-04-02 23:48:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:00,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:48:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:00,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:48:00,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:48:00,632 INFO L87 Difference]: Start difference. First operand 824 states and 1251 transitions. Second operand has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:48:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:00,831 INFO L93 Difference]: Finished difference Result 845 states and 1277 transitions. [2023-04-02 23:48:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:48:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 122 [2023-04-02 23:48:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:00,836 INFO L225 Difference]: With dead ends: 845 [2023-04-02 23:48:00,836 INFO L226 Difference]: Without dead ends: 828 [2023-04-02 23:48:00,837 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 23:48:00,843 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 10 mSDsluCounter, 3665 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4279 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:00,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4279 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:48:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-04-02 23:48:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 824. [2023-04-02 23:48:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 535 states have (on average 1.5383177570093458) internal successors, (823), 568 states have internal predecessors, (823), 214 states have call successors, (214), 77 states have call predecessors, (214), 74 states have return successors, (212), 202 states have call predecessors, (212), 206 states have call successors, (212) [2023-04-02 23:48:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1249 transitions. [2023-04-02 23:48:00,897 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1249 transitions. Word has length 122 [2023-04-02 23:48:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:00,898 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1249 transitions. [2023-04-02 23:48:00,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:48:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1249 transitions. [2023-04-02 23:48:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:48:00,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:00,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:48:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:48:00,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:00,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:00,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1765562646, now seen corresponding path program 1 times [2023-04-02 23:48:00,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526237289] [2023-04-02 23:48:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:48:01,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526237289] [2023-04-02 23:48:01,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526237289] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:01,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:48:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808351716] [2023-04-02 23:48:01,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:01,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:48:01,252 INFO L87 Difference]: Start difference. First operand 824 states and 1249 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:02,598 INFO L93 Difference]: Finished difference Result 2454 states and 3816 transitions. [2023-04-02 23:48:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 137 [2023-04-02 23:48:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:02,609 INFO L225 Difference]: With dead ends: 2454 [2023-04-02 23:48:02,609 INFO L226 Difference]: Without dead ends: 1672 [2023-04-02 23:48:02,614 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 23:48:02,618 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1223 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:02,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 507 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:48:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2023-04-02 23:48:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1574. [2023-04-02 23:48:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1044 states have (on average 1.553639846743295) internal successors, (1622), 1108 states have internal predecessors, (1622), 392 states have call successors, (392), 131 states have call predecessors, (392), 137 states have return successors, (421), 368 states have call predecessors, (421), 383 states have call successors, (421) [2023-04-02 23:48:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2435 transitions. [2023-04-02 23:48:02,719 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2435 transitions. Word has length 137 [2023-04-02 23:48:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:02,721 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2435 transitions. [2023-04-02 23:48:02,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2435 transitions. [2023-04-02 23:48:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:48:02,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:02,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:48:02,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:48:02,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:02,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1100549136, now seen corresponding path program 1 times [2023-04-02 23:48:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:02,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604570663] [2023-04-02 23:48:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:02,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:48:03,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:03,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604570663] [2023-04-02 23:48:03,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604570663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:03,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:03,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:48:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850098076] [2023-04-02 23:48:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:48:03,071 INFO L87 Difference]: Start difference. First operand 1574 states and 2435 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:04,573 INFO L93 Difference]: Finished difference Result 4649 states and 7352 transitions. [2023-04-02 23:48:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:04,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2023-04-02 23:48:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:04,593 INFO L225 Difference]: With dead ends: 4649 [2023-04-02 23:48:04,593 INFO L226 Difference]: Without dead ends: 3120 [2023-04-02 23:48:04,601 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 23:48:04,601 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:04,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 512 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:48:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2023-04-02 23:48:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2999. [2023-04-02 23:48:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2020 states have (on average 1.561881188118812) internal successors, (3155), 2148 states have internal predecessors, (3155), 714 states have call successors, (714), 239 states have call predecessors, (714), 264 states have return successors, (839), 669 states have call predecessors, (839), 703 states have call successors, (839) [2023-04-02 23:48:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4708 transitions. [2023-04-02 23:48:04,837 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4708 transitions. Word has length 138 [2023-04-02 23:48:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:04,837 INFO L495 AbstractCegarLoop]: Abstraction has 2999 states and 4708 transitions. [2023-04-02 23:48:04,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4708 transitions. [2023-04-02 23:48:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 23:48:04,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:04,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:48:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:48:04,841 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:04,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:04,841 INFO L85 PathProgramCache]: Analyzing trace with hash -244294932, now seen corresponding path program 1 times [2023-04-02 23:48:04,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826386682] [2023-04-02 23:48:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:48:05,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:05,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826386682] [2023-04-02 23:48:05,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826386682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:05,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:05,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:48:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475120512] [2023-04-02 23:48:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:05,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:05,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:48:05,153 INFO L87 Difference]: Start difference. First operand 2999 states and 4708 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:06,783 INFO L93 Difference]: Finished difference Result 8972 states and 14500 transitions. [2023-04-02 23:48:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 139 [2023-04-02 23:48:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:06,822 INFO L225 Difference]: With dead ends: 8972 [2023-04-02 23:48:06,822 INFO L226 Difference]: Without dead ends: 6024 [2023-04-02 23:48:06,836 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 23:48:06,836 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1216 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:06,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 517 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:48:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2023-04-02 23:48:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 5858. [2023-04-02 23:48:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 3975 states have (on average 1.5640251572327044) internal successors, (6217), 4235 states have internal predecessors, (6217), 1354 states have call successors, (1354), 455 states have call predecessors, (1354), 528 states have return successors, (1799), 1273 states have call predecessors, (1799), 1339 states have call successors, (1799) [2023-04-02 23:48:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 9370 transitions. [2023-04-02 23:48:07,268 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 9370 transitions. Word has length 139 [2023-04-02 23:48:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:07,268 INFO L495 AbstractCegarLoop]: Abstraction has 5858 states and 9370 transitions. [2023-04-02 23:48:07,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 9370 transitions. [2023-04-02 23:48:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 23:48:07,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:07,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:48:07,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:48:07,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:07,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1015215826, now seen corresponding path program 1 times [2023-04-02 23:48:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141767255] [2023-04-02 23:48:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:48:07,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141767255] [2023-04-02 23:48:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141767255] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:07,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:07,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:48:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515083423] [2023-04-02 23:48:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:07,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:07,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:48:07,601 INFO L87 Difference]: Start difference. First operand 5858 states and 9370 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:09,535 INFO L93 Difference]: Finished difference Result 17643 states and 29527 transitions. [2023-04-02 23:48:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 140 [2023-04-02 23:48:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:09,603 INFO L225 Difference]: With dead ends: 17643 [2023-04-02 23:48:09,604 INFO L226 Difference]: Without dead ends: 11848 [2023-04-02 23:48:09,628 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 23:48:09,629 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1213 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:09,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 522 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:48:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2023-04-02 23:48:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11593. [2023-04-02 23:48:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11593 states, 7890 states have (on average 1.5628643852978454) internal successors, (12331), 8422 states have internal predecessors, (12331), 2626 states have call successors, (2626), 887 states have call predecessors, (2626), 1076 states have return successors, (4147), 2485 states have call predecessors, (4147), 2603 states have call successors, (4147) [2023-04-02 23:48:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11593 states to 11593 states and 19104 transitions. [2023-04-02 23:48:10,651 INFO L78 Accepts]: Start accepts. Automaton has 11593 states and 19104 transitions. Word has length 140 [2023-04-02 23:48:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:10,651 INFO L495 AbstractCegarLoop]: Abstraction has 11593 states and 19104 transitions. [2023-04-02 23:48:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11593 states and 19104 transitions. [2023-04-02 23:48:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 23:48:10,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:10,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:48:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:48:10,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:10,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1405347566, now seen corresponding path program 1 times [2023-04-02 23:48:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92019089] [2023-04-02 23:48:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:48:10,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:10,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92019089] [2023-04-02 23:48:10,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92019089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:10,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:10,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:48:10,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776714169] [2023-04-02 23:48:10,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:10,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:10,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:48:10,929 INFO L87 Difference]: Start difference. First operand 11593 states and 19104 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:13,495 INFO L93 Difference]: Finished difference Result 35062 states and 62223 transitions. [2023-04-02 23:48:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 141 [2023-04-02 23:48:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:13,624 INFO L225 Difference]: With dead ends: 35062 [2023-04-02 23:48:13,624 INFO L226 Difference]: Without dead ends: 23544 [2023-04-02 23:48:13,760 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 23:48:13,761 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1210 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:13,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 528 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:48:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23544 states. [2023-04-02 23:48:15,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23544 to 22958. [2023-04-02 23:48:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 15672 states have (on average 1.563552833078101) internal successors, (24504), 16734 states have internal predecessors, (24504), 5153 states have call successors, (5153), 1748 states have call predecessors, (5153), 2132 states have return successors, (9816), 4869 states have call predecessors, (9816), 5115 states have call successors, (9816) [2023-04-02 23:48:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 39473 transitions. [2023-04-02 23:48:15,759 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 39473 transitions. Word has length 141 [2023-04-02 23:48:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:15,760 INFO L495 AbstractCegarLoop]: Abstraction has 22958 states and 39473 transitions. [2023-04-02 23:48:15,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:48:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 39473 transitions. [2023-04-02 23:48:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-02 23:48:15,770 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:15,770 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-04-02 23:48:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:48:15,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:15,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -816516229, now seen corresponding path program 1 times [2023-04-02 23:48:15,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:15,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578822626] [2023-04-02 23:48:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:15,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 23:48:15,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:15,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578822626] [2023-04-02 23:48:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578822626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:15,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:48:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922147331] [2023-04-02 23:48:15,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:48:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:48:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:48:15,996 INFO L87 Difference]: Start difference. First operand 22958 states and 39473 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2023-04-02 23:48:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:17,943 INFO L93 Difference]: Finished difference Result 46295 states and 82637 transitions. [2023-04-02 23:48:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) Word has length 201 [2023-04-02 23:48:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:18,050 INFO L225 Difference]: With dead ends: 46295 [2023-04-02 23:48:18,051 INFO L226 Difference]: Without dead ends: 23380 [2023-04-02 23:48:18,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:48:18,108 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 10 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:18,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2435 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:48:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23380 states. [2023-04-02 23:48:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23380 to 23230. [2023-04-02 23:48:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23230 states, 15864 states have (on average 1.5567322239031771) internal successors, (24696), 16926 states have internal predecessors, (24696), 5169 states have call successors, (5169), 1748 states have call predecessors, (5169), 2196 states have return successors, (10123), 4949 states have call predecessors, (10123), 5131 states have call successors, (10123) [2023-04-02 23:48:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23230 states to 23230 states and 39988 transitions. [2023-04-02 23:48:20,024 INFO L78 Accepts]: Start accepts. Automaton has 23230 states and 39988 transitions. Word has length 201 [2023-04-02 23:48:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:20,025 INFO L495 AbstractCegarLoop]: Abstraction has 23230 states and 39988 transitions. [2023-04-02 23:48:20,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2023-04-02 23:48:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 23230 states and 39988 transitions. [2023-04-02 23:48:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-04-02 23:48:20,035 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:20,035 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:20,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:48:20,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:20,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1082430890, now seen corresponding path program 1 times [2023-04-02 23:48:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882275495] [2023-04-02 23:48:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 23:48:20,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882275495] [2023-04-02 23:48:20,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882275495] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:48:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165626772] [2023-04-02 23:48:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:20,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:20,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:48:20,400 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 23:48:20,404 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 23:48:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:20,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 3162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:48:21,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:48:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-02 23:48:21,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:48:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165626772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:21,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:48:21,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:48:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131712132] [2023-04-02 23:48:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:21,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:21,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:48:21,129 INFO L87 Difference]: Start difference. First operand 23230 states and 39988 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:23,369 INFO L93 Difference]: Finished difference Result 48913 states and 87664 transitions. [2023-04-02 23:48:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:23,372 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 206 [2023-04-02 23:48:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:23,583 INFO L225 Difference]: With dead ends: 48913 [2023-04-02 23:48:23,583 INFO L226 Difference]: Without dead ends: 25726 [2023-04-02 23:48:23,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 208 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 23:48:23,659 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 213 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:23,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1620 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:48:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25726 states. [2023-04-02 23:48:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25726 to 25726. [2023-04-02 23:48:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25726 states, 18296 states have (on average 1.605159597726279) internal successors, (29368), 19358 states have internal predecessors, (29368), 5169 states have call successors, (5169), 1812 states have call predecessors, (5169), 2260 states have return successors, (10123), 4949 states have call predecessors, (10123), 5131 states have call successors, (10123) [2023-04-02 23:48:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25726 states to 25726 states and 44660 transitions. [2023-04-02 23:48:25,670 INFO L78 Accepts]: Start accepts. Automaton has 25726 states and 44660 transitions. Word has length 206 [2023-04-02 23:48:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:25,670 INFO L495 AbstractCegarLoop]: Abstraction has 25726 states and 44660 transitions. [2023-04-02 23:48:25,670 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 25726 states and 44660 transitions. [2023-04-02 23:48:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-04-02 23:48:25,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:25,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:25,695 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 23:48:25,892 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,SelfDestructingSolverStorable10 [2023-04-02 23:48:25,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:25,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1608678158, now seen corresponding path program 1 times [2023-04-02 23:48:25,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:25,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494670494] [2023-04-02 23:48:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:25,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 23:48:26,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:26,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494670494] [2023-04-02 23:48:26,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494670494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:48:26,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893921992] [2023-04-02 23:48:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:26,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:26,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:48:26,127 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 23:48:26,130 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 23:48:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:26,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 3167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:48:26,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:48:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-02 23:48:26,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:48:26,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893921992] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:26,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:48:26,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:48:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284883837] [2023-04-02 23:48:26,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:26,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:48:26,752 INFO L87 Difference]: Start difference. First operand 25726 states and 44660 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:28,258 INFO L93 Difference]: Finished difference Result 53905 states and 96942 transitions. [2023-04-02 23:48:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:28,258 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 211 [2023-04-02 23:48:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:28,373 INFO L225 Difference]: With dead ends: 53905 [2023-04-02 23:48:28,373 INFO L226 Difference]: Without dead ends: 28222 [2023-04-02 23:48:28,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:48:28,434 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 211 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:28,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1620 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:48:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28222 states. [2023-04-02 23:48:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28222 to 28222. [2023-04-02 23:48:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28222 states, 20728 states have (on average 1.6422230798919337) internal successors, (34040), 21790 states have internal predecessors, (34040), 5169 states have call successors, (5169), 1876 states have call predecessors, (5169), 2324 states have return successors, (10123), 4949 states have call predecessors, (10123), 5131 states have call successors, (10123) [2023-04-02 23:48:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 49332 transitions. [2023-04-02 23:48:30,107 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 49332 transitions. Word has length 211 [2023-04-02 23:48:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:30,107 INFO L495 AbstractCegarLoop]: Abstraction has 28222 states and 49332 transitions. [2023-04-02 23:48:30,108 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 49332 transitions. [2023-04-02 23:48:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-02 23:48:30,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:30,119 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:30,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 23:48:30,328 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,SelfDestructingSolverStorable11 [2023-04-02 23:48:30,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:30,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1088281374, now seen corresponding path program 1 times [2023-04-02 23:48:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541546839] [2023-04-02 23:48:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-02 23:48:30,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541546839] [2023-04-02 23:48:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541546839] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:48:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161635484] [2023-04-02 23:48:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:30,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:30,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:48:30,614 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 23:48:30,617 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 23:48:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:31,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:48:31,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:48:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 23:48:31,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:48:31,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161635484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:31,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:48:31,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:48:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315666691] [2023-04-02 23:48:31,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:31,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:31,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:31,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:31,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:48:31,171 INFO L87 Difference]: Start difference. First operand 28222 states and 49332 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:32,507 INFO L93 Difference]: Finished difference Result 58897 states and 106220 transitions. [2023-04-02 23:48:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:32,508 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 215 [2023-04-02 23:48:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:32,647 INFO L225 Difference]: With dead ends: 58897 [2023-04-02 23:48:32,647 INFO L226 Difference]: Without dead ends: 30718 [2023-04-02 23:48:32,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:48:32,723 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 209 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:32,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1620 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:48:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2023-04-02 23:48:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 30718. [2023-04-02 23:48:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30718 states, 23160 states have (on average 1.6715025906735752) internal successors, (38712), 24222 states have internal predecessors, (38712), 5169 states have call successors, (5169), 1940 states have call predecessors, (5169), 2388 states have return successors, (10123), 4949 states have call predecessors, (10123), 5131 states have call successors, (10123) [2023-04-02 23:48:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30718 states to 30718 states and 54004 transitions. [2023-04-02 23:48:34,662 INFO L78 Accepts]: Start accepts. Automaton has 30718 states and 54004 transitions. Word has length 215 [2023-04-02 23:48:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:34,663 INFO L495 AbstractCegarLoop]: Abstraction has 30718 states and 54004 transitions. [2023-04-02 23:48:34,663 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, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 30718 states and 54004 transitions. [2023-04-02 23:48:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-02 23:48:34,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:34,674 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:34,684 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 23:48:34,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:34,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:34,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1106203338, now seen corresponding path program 1 times [2023-04-02 23:48:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:34,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086737597] [2023-04-02 23:48:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:34,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:48:35,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:35,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086737597] [2023-04-02 23:48:35,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086737597] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:48:35,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577956376] [2023-04-02 23:48:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:35,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:48:35,128 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 23:48:35,130 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 23:48:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:35,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 3174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:48:35,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:48:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:48:35,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:48:35,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577956376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:35,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:48:35,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:48:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734859479] [2023-04-02 23:48:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:35,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:48:35,691 INFO L87 Difference]: Start difference. First operand 30718 states and 54004 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:37,167 INFO L93 Difference]: Finished difference Result 63889 states and 115498 transitions. [2023-04-02 23:48:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 218 [2023-04-02 23:48:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:37,279 INFO L225 Difference]: With dead ends: 63889 [2023-04-02 23:48:37,279 INFO L226 Difference]: Without dead ends: 33214 [2023-04-02 23:48:37,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:48:37,348 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 207 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:37,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1620 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:48:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33214 states. [2023-04-02 23:48:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33214 to 33214. [2023-04-02 23:48:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33214 states, 25592 states have (on average 1.6952172553923102) internal successors, (43384), 26654 states have internal predecessors, (43384), 5169 states have call successors, (5169), 2004 states have call predecessors, (5169), 2452 states have return successors, (10123), 4949 states have call predecessors, (10123), 5131 states have call successors, (10123) [2023-04-02 23:48:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33214 states to 33214 states and 58676 transitions. [2023-04-02 23:48:39,076 INFO L78 Accepts]: Start accepts. Automaton has 33214 states and 58676 transitions. Word has length 218 [2023-04-02 23:48:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:39,076 INFO L495 AbstractCegarLoop]: Abstraction has 33214 states and 58676 transitions. [2023-04-02 23:48:39,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33214 states and 58676 transitions. [2023-04-02 23:48:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-04-02 23:48:39,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:39,088 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:39,101 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 23:48:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:39,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:39,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash -225364550, now seen corresponding path program 1 times [2023-04-02 23:48:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:39,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163627717] [2023-04-02 23:48:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:39,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:48:39,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163627717] [2023-04-02 23:48:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163627717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:39,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:48:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828228267] [2023-04-02 23:48:39,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:48:39,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:48:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:48:39,548 INFO L87 Difference]: Start difference. First operand 33214 states and 58676 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:41,033 INFO L93 Difference]: Finished difference Result 69073 states and 124720 transitions. [2023-04-02 23:48:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:48:41,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 220 [2023-04-02 23:48:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:41,153 INFO L225 Difference]: With dead ends: 69073 [2023-04-02 23:48:41,153 INFO L226 Difference]: Without dead ends: 35390 [2023-04-02 23:48:41,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:48:41,219 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 99 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:41,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1633 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:48:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35390 states. [2023-04-02 23:48:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35390 to 35390. [2023-04-02 23:48:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35390 states, 27704 states have (on average 1.6075656944845509) internal successors, (44536), 28766 states have internal predecessors, (44536), 5169 states have call successors, (5169), 2068 states have call predecessors, (5169), 2516 states have return successors, (10123), 4949 states have call predecessors, (10123), 5131 states have call successors, (10123) [2023-04-02 23:48:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35390 states to 35390 states and 59828 transitions. [2023-04-02 23:48:43,024 INFO L78 Accepts]: Start accepts. Automaton has 35390 states and 59828 transitions. Word has length 220 [2023-04-02 23:48:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:43,024 INFO L495 AbstractCegarLoop]: Abstraction has 35390 states and 59828 transitions. [2023-04-02 23:48:43,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-02 23:48:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 35390 states and 59828 transitions. [2023-04-02 23:48:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-04-02 23:48:43,034 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:43,034 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 23:48:43,034 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:43,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash -6849429, now seen corresponding path program 1 times [2023-04-02 23:48:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719284399] [2023-04-02 23:48:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:48:43,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719284399] [2023-04-02 23:48:43,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719284399] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:43,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:48:43,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:48:43,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917251585] [2023-04-02 23:48:43,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:43,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:48:43,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:48:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:48:43,565 INFO L87 Difference]: Start difference. First operand 35390 states and 59828 transitions. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 7 states have call successors, (45), 4 states have call predecessors, (45), 5 states have return successors, (41), 7 states have call predecessors, (41), 6 states have call successors, (41) [2023-04-02 23:48:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:48,497 INFO L93 Difference]: Finished difference Result 80689 states and 140811 transitions. [2023-04-02 23:48:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 23:48:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 7 states have call successors, (45), 4 states have call predecessors, (45), 5 states have return successors, (41), 7 states have call predecessors, (41), 6 states have call successors, (41) Word has length 220 [2023-04-02 23:48:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:48,626 INFO L225 Difference]: With dead ends: 80689 [2023-04-02 23:48:48,627 INFO L226 Difference]: Without dead ends: 38137 [2023-04-02 23:48:48,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:48:48,710 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1682 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 4921 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 5728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 4921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:48,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 700 Invalid, 5728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 4921 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 23:48:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38137 states. [2023-04-02 23:48:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38137 to 37150. [2023-04-02 23:48:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37150 states, 26807 states have (on average 1.4985638079606074) internal successors, (40172), 28286 states have internal predecessors, (40172), 6803 states have call successors, (6803), 2963 states have call predecessors, (6803), 3539 states have return successors, (13225), 6299 states have call predecessors, (13225), 6765 states have call successors, (13225) [2023-04-02 23:48:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37150 states to 37150 states and 60200 transitions. [2023-04-02 23:48:51,267 INFO L78 Accepts]: Start accepts. Automaton has 37150 states and 60200 transitions. Word has length 220 [2023-04-02 23:48:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:51,267 INFO L495 AbstractCegarLoop]: Abstraction has 37150 states and 60200 transitions. [2023-04-02 23:48:51,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 7 states have call successors, (45), 4 states have call predecessors, (45), 5 states have return successors, (41), 7 states have call predecessors, (41), 6 states have call successors, (41) [2023-04-02 23:48:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 37150 states and 60200 transitions. [2023-04-02 23:48:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-04-02 23:48:51,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:51,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:51,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 23:48:51,277 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:51,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1672976856, now seen corresponding path program 1 times [2023-04-02 23:48:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:51,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281626636] [2023-04-02 23:48:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-02 23:48:55,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:55,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281626636] [2023-04-02 23:48:55,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281626636] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:48:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84815217] [2023-04-02 23:48:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:55,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:48:55,429 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 23:48:55,432 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 23:48:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:55,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 23:48:55,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:48:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-04-02 23:48:56,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:48:56,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84815217] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:56,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:48:56,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [41] total 46 [2023-04-02 23:48:56,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106526525] [2023-04-02 23:48:56,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:56,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:48:56,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:48:56,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1918, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 23:48:56,083 INFO L87 Difference]: Start difference. First operand 37150 states and 60200 transitions. Second operand has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (41), 4 states have call predecessors, (41), 1 states have call successors, (41) [2023-04-02 23:48:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:48:57,845 INFO L93 Difference]: Finished difference Result 38017 states and 61253 transitions. [2023-04-02 23:48:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:48:57,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (41), 4 states have call predecessors, (41), 1 states have call successors, (41) Word has length 221 [2023-04-02 23:48:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:48:57,948 INFO L225 Difference]: With dead ends: 38017 [2023-04-02 23:48:57,949 INFO L226 Difference]: Without dead ends: 37798 [2023-04-02 23:48:57,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=2006, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 23:48:57,966 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 8 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3710 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:48:57,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3710 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:48:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37798 states. [2023-04-02 23:49:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37798 to 37522. [2023-04-02 23:49:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37522 states, 27055 states have (on average 1.493993716503419) internal successors, (40420), 28534 states have internal predecessors, (40420), 6803 states have call successors, (6803), 2963 states have call predecessors, (6803), 3663 states have return successors, (13349), 6423 states have call predecessors, (13349), 6765 states have call successors, (13349) [2023-04-02 23:49:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37522 states to 37522 states and 60572 transitions. [2023-04-02 23:49:00,170 INFO L78 Accepts]: Start accepts. Automaton has 37522 states and 60572 transitions. Word has length 221 [2023-04-02 23:49:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:49:00,170 INFO L495 AbstractCegarLoop]: Abstraction has 37522 states and 60572 transitions. [2023-04-02 23:49:00,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (41), 4 states have call predecessors, (41), 1 states have call successors, (41) [2023-04-02 23:49:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 37522 states and 60572 transitions. [2023-04-02 23:49:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-04-02 23:49:00,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:49:00,178 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:00,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 23:49:00,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 23:49:00,379 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:49:00,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:49:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash 421753835, now seen corresponding path program 1 times [2023-04-02 23:49:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:49:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888375809] [2023-04-02 23:49:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:49:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2023-04-02 23:49:01,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:49:01,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888375809] [2023-04-02 23:49:01,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888375809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:49:01,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327833990] [2023-04-02 23:49:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:49:01,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:49:01,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:49:01,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:49:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:01,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 3987 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:49:01,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:49:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2023-04-02 23:49:01,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:49:01,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327833990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:49:01,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:49:01,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-02 23:49:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407992904] [2023-04-02 23:49:01,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:49:01,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:49:01,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:49:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:49:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:49:01,611 INFO L87 Difference]: Start difference. First operand 37522 states and 60572 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-04-02 23:49:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:49:03,668 INFO L93 Difference]: Finished difference Result 75442 states and 124595 transitions. [2023-04-02 23:49:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:49:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) Word has length 348 [2023-04-02 23:49:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:49:03,795 INFO L225 Difference]: With dead ends: 75442 [2023-04-02 23:49:03,795 INFO L226 Difference]: Without dead ends: 37962 [2023-04-02 23:49:03,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:49:03,946 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 14 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:49:03,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1209 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:49:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37962 states. [2023-04-02 23:49:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37962 to 37944. [2023-04-02 23:49:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37944 states, 27434 states have (on average 1.4906685135233653) internal successors, (40895), 29026 states have internal predecessors, (40895), 6791 states have call successors, (6791), 2963 states have call predecessors, (6791), 3718 states have return successors, (10564), 6353 states have call predecessors, (10564), 6753 states have call successors, (10564) [2023-04-02 23:49:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37944 states to 37944 states and 58250 transitions. [2023-04-02 23:49:06,067 INFO L78 Accepts]: Start accepts. Automaton has 37944 states and 58250 transitions. Word has length 348 [2023-04-02 23:49:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:49:06,068 INFO L495 AbstractCegarLoop]: Abstraction has 37944 states and 58250 transitions. [2023-04-02 23:49:06,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-04-02 23:49:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 37944 states and 58250 transitions. [2023-04-02 23:49:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-04-02 23:49:06,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:49:06,074 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:06,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:49:06,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 23:49:06,275 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:49:06,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:49:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -944446171, now seen corresponding path program 1 times [2023-04-02 23:49:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:49:06,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367197509] [2023-04-02 23:49:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:49:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2023-04-02 23:49:06,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:49:06,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367197509] [2023-04-02 23:49:06,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367197509] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:49:06,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519853210] [2023-04-02 23:49:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:06,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:49:06,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:49:06,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:49:06,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:49:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:07,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 3981 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:49:07,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:49:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2023-04-02 23:49:07,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:49:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519853210] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:49:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:49:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-04-02 23:49:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375694235] [2023-04-02 23:49:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:49:07,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:49:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:49:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:49:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:49:07,725 INFO L87 Difference]: Start difference. First operand 37944 states and 58250 transitions. Second operand has 9 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (44), 6 states have call predecessors, (44), 3 states have call successors, (44) [2023-04-02 23:49:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:49:13,265 INFO L93 Difference]: Finished difference Result 89043 states and 140350 transitions. [2023-04-02 23:49:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:49:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (44), 6 states have call predecessors, (44), 3 states have call successors, (44) Word has length 346 [2023-04-02 23:49:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:49:13,446 INFO L225 Difference]: With dead ends: 89043 [2023-04-02 23:49:13,447 INFO L226 Difference]: Without dead ends: 51142 [2023-04-02 23:49:13,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:49:13,525 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1856 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 5479 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 6227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 5479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:49:13,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 651 Invalid, 6227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 5479 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 23:49:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51142 states. [2023-04-02 23:49:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51142 to 48503. [2023-04-02 23:49:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48503 states, 36079 states have (on average 1.5051969289614457) internal successors, (54306), 37836 states have internal predecessors, (54306), 7964 states have call successors, (7964), 3655 states have call predecessors, (7964), 4459 states have return successors, (13064), 7438 states have call predecessors, (13064), 7926 states have call successors, (13064) [2023-04-02 23:49:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48503 states to 48503 states and 75334 transitions. [2023-04-02 23:49:16,441 INFO L78 Accepts]: Start accepts. Automaton has 48503 states and 75334 transitions. Word has length 346 [2023-04-02 23:49:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:49:16,441 INFO L495 AbstractCegarLoop]: Abstraction has 48503 states and 75334 transitions. [2023-04-02 23:49:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (44), 6 states have call predecessors, (44), 3 states have call successors, (44) [2023-04-02 23:49:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 48503 states and 75334 transitions. [2023-04-02 23:49:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-04-02 23:49:16,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:49:16,448 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:16,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:49:16,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:49:16,650 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:49:16,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:49:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1659696858, now seen corresponding path program 1 times [2023-04-02 23:49:16,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:49:16,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367401078] [2023-04-02 23:49:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:16,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:49:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2023-04-02 23:49:17,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:49:17,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367401078] [2023-04-02 23:49:17,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367401078] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:49:17,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016079771] [2023-04-02 23:49:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:49:17,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:49:17,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:49:17,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:49:17,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:49:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:49:17,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 3978 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:49:17,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:49:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2023-04-02 23:49:18,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:49:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2023-04-02 23:49:19,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016079771] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:49:19,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005258794] [2023-04-02 23:49:19,088 INFO L159 IcfgInterpreter]: Started Sifa with 183 locations of interest [2023-04-02 23:49:19,089 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:49:19,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:49:19,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:49:19,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:49:21,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 187 for LOIs [2023-04-02 23:49:22,315 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 242 for LOIs [2023-04-02 23:49:25,282 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 242 for LOIs [2023-04-02 23:49:29,521 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...