/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 EqDomain -i ../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:38:55,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:38:55,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:38:56,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:38:56,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:38:56,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:38:56,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:38:56,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:38:56,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:38:56,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:38:56,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:38:56,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:38:56,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:38:56,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:38:56,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:38:56,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:38:56,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:38:56,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:38:56,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:38:56,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:38:56,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:38:56,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:38:56,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:38:56,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:38:56,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:38:56,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:38:56,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:38:56,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:38:56,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:38:56,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:38:56,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:38:56,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:38:56,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:38:56,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:38:56,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:38:56,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:38:56,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:38:56,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:38:56,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:38:56,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:38:56,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:38:56,070 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 [2023-04-01 11:38:56,092 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:38:56,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:38:56,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:38:56,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:38:56,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:38:56,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:38:56,094 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:38:56,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:38:56,094 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:38:56,094 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:38:56,095 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:38:56,095 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:38:56,095 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:38:56,095 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:38:56,095 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:38:56,096 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:38:56,096 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:38:56,096 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:38:56,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:38:56,096 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:38:56,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:38:56,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:38:56,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:38:56,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:38:56,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:38:56,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:38:56,098 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:38:56,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:38:56,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:38:56,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:38:56,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:38:56,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:38:56,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:38:56,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:38:56,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:38:56,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:38:56,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:38:56,328 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:38:56,330 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:38:56,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2023-04-01 11:38:57,485 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:38:57,734 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:38:57,735 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2023-04-01 11:38:57,751 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89316cc8e/90eba743473342178121e814f8ec1ce6/FLAG1d5dd0f89 [2023-04-01 11:38:57,761 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89316cc8e/90eba743473342178121e814f8ec1ce6 [2023-04-01 11:38:57,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:38:57,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:38:57,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:38:57,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:38:57,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:38:57,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:38:57" (1/1) ... [2023-04-01 11:38:57,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a49cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:57, skipping insertion in model container [2023-04-01 11:38:57,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:38:57" (1/1) ... [2023-04-01 11:38:57,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:38:57,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:38:57,926 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_spec1_product18.cil.c[1545,1558] [2023-04-01 11:38:58,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:38:58,263 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:38:58,275 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_spec1_product18.cil.c[1545,1558] [2023-04-01 11:38:58,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:38:58,370 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:38:58,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58 WrapperNode [2023-04-01 11:38:58,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:38:58,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:38:58,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:38:58,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:38:58,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:38:58,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:38:58,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:38:58,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:38:58,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (1/1) ... [2023-04-01 11:38:58,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:38:58,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:58,557 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) [2023-04-01 11:38:58,573 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 [2023-04-01 11:38:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:38:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:38:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:38:58,590 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:38:58,591 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:38:58,592 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:38:58,592 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:38:58,592 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:38:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:38:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:38:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:38:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:38:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:38:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:38:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:38:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:38:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:38:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:38:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:38:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-04-01 11:38:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:38:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:38:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:38:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:38:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:38:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:38:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:38:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:38:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:38:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:38:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:38:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:38:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:38:58,911 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:38:58,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:39:00,023 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:39:00,670 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:39:00,670 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:39:00,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:39:00 BoogieIcfgContainer [2023-04-01 11:39:00,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:39:00,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:39:00,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:39:00,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:39:00,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:38:57" (1/3) ... [2023-04-01 11:39:00,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c35e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:39:00, skipping insertion in model container [2023-04-01 11:39:00,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:38:58" (2/3) ... [2023-04-01 11:39:00,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c35e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:39:00, skipping insertion in model container [2023-04-01 11:39:00,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:39:00" (3/3) ... [2023-04-01 11:39:00,686 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2023-04-01 11:39:00,700 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:39:00,700 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:39:00,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:39:00,762 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;@4a0aa68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:39:00,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:39:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 558 states, 325 states have (on average 1.4984615384615385) internal successors, (487), 354 states have internal predecessors, (487), 171 states have call successors, (171), 49 states have call predecessors, (171), 49 states have return successors, (171), 161 states have call predecessors, (171), 171 states have call successors, (171) [2023-04-01 11:39:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 11:39:00,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:00,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:00,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:00,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1721919034, now seen corresponding path program 1 times [2023-04-01 11:39:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:00,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076277457] [2023-04-01 11:39:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:00,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:01,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:01,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076277457] [2023-04-01 11:39:01,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076277457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:01,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:01,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:39:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483785864] [2023-04-01 11:39:01,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:39:01,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:39:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:39:01,855 INFO L87 Difference]: Start difference. First operand has 558 states, 325 states have (on average 1.4984615384615385) internal successors, (487), 354 states have internal predecessors, (487), 171 states have call successors, (171), 49 states have call predecessors, (171), 49 states have return successors, (171), 161 states have call predecessors, (171), 171 states have call successors, (171) Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-01 11:39:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:03,693 INFO L93 Difference]: Finished difference Result 1309 states and 2045 transitions. [2023-04-01 11:39:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:39:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 97 [2023-04-01 11:39:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:03,715 INFO L225 Difference]: With dead ends: 1309 [2023-04-01 11:39:03,715 INFO L226 Difference]: Without dead ends: 910 [2023-04-01 11:39:03,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:03,722 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2068 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:03,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2141 Valid, 469 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 11:39:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-04-01 11:39:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 821. [2023-04-01 11:39:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 546 states have (on average 1.5787545787545787) internal successors, (862), 576 states have internal predecessors, (862), 206 states have call successors, (206), 69 states have call predecessors, (206), 68 states have return successors, (208), 185 states have call predecessors, (208), 198 states have call successors, (208) [2023-04-01 11:39:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1276 transitions. [2023-04-01 11:39:03,845 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1276 transitions. Word has length 97 [2023-04-01 11:39:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:03,846 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1276 transitions. [2023-04-01 11:39:03,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-01 11:39:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1276 transitions. [2023-04-01 11:39:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 11:39:03,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:03,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:03,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:39:03,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:03,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:03,854 INFO L85 PathProgramCache]: Analyzing trace with hash -878789030, now seen corresponding path program 1 times [2023-04-01 11:39:03,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:03,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355407134] [2023-04-01 11:39:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:03,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:04,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355407134] [2023-04-01 11:39:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355407134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:04,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 11:39:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253797321] [2023-04-01 11:39:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:04,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:39:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:39:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:39:04,506 INFO L87 Difference]: Start difference. First operand 821 states and 1276 transitions. Second operand has 12 states, 9 states have (on average 6.777777777777778) internal successors, (61), 10 states have internal predecessors, (61), 6 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 11:39:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:08,497 INFO L93 Difference]: Finished difference Result 2435 states and 3822 transitions. [2023-04-01 11:39:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 11:39:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.777777777777778) internal successors, (61), 10 states have internal predecessors, (61), 6 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) Word has length 125 [2023-04-01 11:39:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:08,504 INFO L225 Difference]: With dead ends: 2435 [2023-04-01 11:39:08,504 INFO L226 Difference]: Without dead ends: 1667 [2023-04-01 11:39:08,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:39:08,525 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1153 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 8558 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 9084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 8558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:08,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 1390 Invalid, 9084 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [526 Valid, 8558 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 11:39:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-04-01 11:39:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1608. [2023-04-01 11:39:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1086 states have (on average 1.567219152854512) internal successors, (1702), 1133 states have internal predecessors, (1702), 386 states have call successors, (386), 123 states have call predecessors, (386), 135 states have return successors, (418), 371 states have call predecessors, (418), 378 states have call successors, (418) [2023-04-01 11:39:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2506 transitions. [2023-04-01 11:39:08,644 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2506 transitions. Word has length 125 [2023-04-01 11:39:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:08,645 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2506 transitions. [2023-04-01 11:39:08,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.777777777777778) internal successors, (61), 10 states have internal predecessors, (61), 6 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (25), 8 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 11:39:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2506 transitions. [2023-04-01 11:39:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 11:39:08,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:08,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:08,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:39:08,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:08,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash -215632885, now seen corresponding path program 1 times [2023-04-01 11:39:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385058336] [2023-04-01 11:39:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:09,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385058336] [2023-04-01 11:39:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385058336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:09,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:09,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:39:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544088914] [2023-04-01 11:39:09,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:39:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:39:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:09,020 INFO L87 Difference]: Start difference. First operand 1608 states and 2506 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:39:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:09,256 INFO L93 Difference]: Finished difference Result 3443 states and 5455 transitions. [2023-04-01 11:39:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:39:09,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 126 [2023-04-01 11:39:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:09,265 INFO L225 Difference]: With dead ends: 3443 [2023-04-01 11:39:09,265 INFO L226 Difference]: Without dead ends: 1890 [2023-04-01 11:39:09,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:09,275 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 33 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4269 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:09,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4269 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:39:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2023-04-01 11:39:09,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1632. [2023-04-01 11:39:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1104 states have (on average 1.5579710144927537) internal successors, (1720), 1151 states have internal predecessors, (1720), 386 states have call successors, (386), 123 states have call predecessors, (386), 141 states have return successors, (424), 377 states have call predecessors, (424), 378 states have call successors, (424) [2023-04-01 11:39:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2530 transitions. [2023-04-01 11:39:09,350 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2530 transitions. Word has length 126 [2023-04-01 11:39:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:09,350 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2530 transitions. [2023-04-01 11:39:09,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:39:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2530 transitions. [2023-04-01 11:39:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 11:39:09,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:09,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:09,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:39:09,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:09,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:09,354 INFO L85 PathProgramCache]: Analyzing trace with hash -17132644, now seen corresponding path program 1 times [2023-04-01 11:39:09,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:09,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840300259] [2023-04-01 11:39:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:09,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:09,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840300259] [2023-04-01 11:39:09,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840300259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:09,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:09,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:39:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837913498] [2023-04-01 11:39:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:39:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:39:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:39:09,816 INFO L87 Difference]: Start difference. First operand 1632 states and 2530 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-01 11:39:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:12,047 INFO L93 Difference]: Finished difference Result 4451 states and 6997 transitions. [2023-04-01 11:39:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:39:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) Word has length 130 [2023-04-01 11:39:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:12,091 INFO L225 Difference]: With dead ends: 4451 [2023-04-01 11:39:12,091 INFO L226 Difference]: Without dead ends: 2874 [2023-04-01 11:39:12,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:39:12,113 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 1701 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 3373 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 3373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:12,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1773 Valid, 655 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 3373 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 11:39:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2023-04-01 11:39:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2809. [2023-04-01 11:39:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 1958 states have (on average 1.5934627170582227) internal successors, (3120), 2036 states have internal predecessors, (3120), 623 states have call successors, (623), 194 states have call predecessors, (623), 227 states have return successors, (693), 608 states have call predecessors, (693), 615 states have call successors, (693) [2023-04-01 11:39:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 4436 transitions. [2023-04-01 11:39:12,258 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 4436 transitions. Word has length 130 [2023-04-01 11:39:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:12,258 INFO L495 AbstractCegarLoop]: Abstraction has 2809 states and 4436 transitions. [2023-04-01 11:39:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-01 11:39:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 4436 transitions. [2023-04-01 11:39:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 11:39:12,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:12,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:12,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:39:12,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:12,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash -525099894, now seen corresponding path program 1 times [2023-04-01 11:39:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:12,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140363003] [2023-04-01 11:39:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:12,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140363003] [2023-04-01 11:39:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140363003] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:12,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:12,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:39:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383643322] [2023-04-01 11:39:12,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:39:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:39:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:39:12,443 INFO L87 Difference]: Start difference. First operand 2809 states and 4436 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:39:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:12,636 INFO L93 Difference]: Finished difference Result 4888 states and 7752 transitions. [2023-04-01 11:39:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:39:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 134 [2023-04-01 11:39:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:12,647 INFO L225 Difference]: With dead ends: 4888 [2023-04-01 11:39:12,647 INFO L226 Difference]: Without dead ends: 2873 [2023-04-01 11:39:12,652 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 [2023-04-01 11:39:12,652 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 7 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:12,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2385 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:39:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2023-04-01 11:39:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2849. [2023-04-01 11:39:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 1988 states have (on average 1.5845070422535212) internal successors, (3150), 2066 states have internal predecessors, (3150), 623 states have call successors, (623), 194 states have call predecessors, (623), 237 states have return successors, (713), 618 states have call predecessors, (713), 615 states have call successors, (713) [2023-04-01 11:39:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4486 transitions. [2023-04-01 11:39:12,766 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4486 transitions. Word has length 134 [2023-04-01 11:39:12,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:12,767 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4486 transitions. [2023-04-01 11:39:12,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:39:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4486 transitions. [2023-04-01 11:39:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 11:39:12,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:12,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:12,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 11:39:12,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:12,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash -940344094, now seen corresponding path program 1 times [2023-04-01 11:39:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:12,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048488137] [2023-04-01 11:39:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:12,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:13,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:13,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048488137] [2023-04-01 11:39:13,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048488137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:13,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:13,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:39:13,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254614040] [2023-04-01 11:39:13,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:13,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:39:13,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:39:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:13,184 INFO L87 Difference]: Start difference. First operand 2849 states and 4486 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2023-04-01 11:39:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:15,218 INFO L93 Difference]: Finished difference Result 6771 states and 10683 transitions. [2023-04-01 11:39:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:39:15,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) Word has length 138 [2023-04-01 11:39:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:15,241 INFO L225 Difference]: With dead ends: 6771 [2023-04-01 11:39:15,241 INFO L226 Difference]: Without dead ends: 4524 [2023-04-01 11:39:15,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:39:15,253 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 2166 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:15,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 420 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 2732 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 11:39:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2023-04-01 11:39:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4460. [2023-04-01 11:39:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 3051 states have (on average 1.5362176335627664) internal successors, (4687), 3182 states have internal predecessors, (4687), 1000 states have call successors, (1000), 331 states have call predecessors, (1000), 408 states have return successors, (1184), 996 states have call predecessors, (1184), 992 states have call successors, (1184) [2023-04-01 11:39:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 6871 transitions. [2023-04-01 11:39:15,533 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 6871 transitions. Word has length 138 [2023-04-01 11:39:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:15,533 INFO L495 AbstractCegarLoop]: Abstraction has 4460 states and 6871 transitions. [2023-04-01 11:39:15,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2023-04-01 11:39:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 6871 transitions. [2023-04-01 11:39:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-01 11:39:15,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:15,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:15,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 11:39:15,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:15,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash 829035385, now seen corresponding path program 1 times [2023-04-01 11:39:15,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:15,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132168781] [2023-04-01 11:39:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:15,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:15,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132168781] [2023-04-01 11:39:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132168781] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:15,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:15,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:39:15,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756235019] [2023-04-01 11:39:15,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:15,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:39:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:39:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:39:15,793 INFO L87 Difference]: Start difference. First operand 4460 states and 6871 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 11:39:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:16,212 INFO L93 Difference]: Finished difference Result 8858 states and 13957 transitions. [2023-04-01 11:39:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:39:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 141 [2023-04-01 11:39:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:16,230 INFO L225 Difference]: With dead ends: 8858 [2023-04-01 11:39:16,230 INFO L226 Difference]: Without dead ends: 4460 [2023-04-01 11:39:16,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:16,245 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 211 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:16,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3530 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:39:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2023-04-01 11:39:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 4460. [2023-04-01 11:39:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 3051 states have (on average 1.4968862667977711) internal successors, (4567), 3182 states have internal predecessors, (4567), 1000 states have call successors, (1000), 331 states have call predecessors, (1000), 408 states have return successors, (1184), 996 states have call predecessors, (1184), 992 states have call successors, (1184) [2023-04-01 11:39:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 6751 transitions. [2023-04-01 11:39:16,469 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 6751 transitions. Word has length 141 [2023-04-01 11:39:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:16,470 INFO L495 AbstractCegarLoop]: Abstraction has 4460 states and 6751 transitions. [2023-04-01 11:39:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 11:39:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 6751 transitions. [2023-04-01 11:39:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 11:39:16,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:16,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 11:39:16,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:16,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -727363910, now seen corresponding path program 1 times [2023-04-01 11:39:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:16,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91299254] [2023-04-01 11:39:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:39:16,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:16,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91299254] [2023-04-01 11:39:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91299254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:16,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:16,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:39:16,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367759313] [2023-04-01 11:39:16,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:39:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:39:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:39:16,904 INFO L87 Difference]: Start difference. First operand 4460 states and 6751 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-01 11:39:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:18,903 INFO L93 Difference]: Finished difference Result 8415 states and 12755 transitions. [2023-04-01 11:39:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:39:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) Word has length 143 [2023-04-01 11:39:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:18,933 INFO L225 Difference]: With dead ends: 8415 [2023-04-01 11:39:18,933 INFO L226 Difference]: Without dead ends: 4671 [2023-04-01 11:39:18,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:39:18,948 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 988 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:18,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 571 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 11:39:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2023-04-01 11:39:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4550. [2023-04-01 11:39:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4550 states, 3111 states have (on average 1.4918032786885247) internal successors, (4641), 3256 states have internal predecessors, (4641), 1002 states have call successors, (1002), 347 states have call predecessors, (1002), 436 states have return successors, (1222), 996 states have call predecessors, (1222), 994 states have call successors, (1222) [2023-04-01 11:39:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4550 states to 4550 states and 6865 transitions. [2023-04-01 11:39:19,183 INFO L78 Accepts]: Start accepts. Automaton has 4550 states and 6865 transitions. Word has length 143 [2023-04-01 11:39:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:19,184 INFO L495 AbstractCegarLoop]: Abstraction has 4550 states and 6865 transitions. [2023-04-01 11:39:19,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-01 11:39:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4550 states and 6865 transitions. [2023-04-01 11:39:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 11:39:19,187 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:19,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:39:19,187 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:19,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1074189219, now seen corresponding path program 1 times [2023-04-01 11:39:19,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:19,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979450547] [2023-04-01 11:39:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:19,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 11:39:19,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979450547] [2023-04-01 11:39:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979450547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:19,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:39:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735929654] [2023-04-01 11:39:19,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:39:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:39:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:39:19,446 INFO L87 Difference]: Start difference. First operand 4550 states and 6865 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-01 11:39:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:20,075 INFO L93 Difference]: Finished difference Result 4603 states and 6947 transitions. [2023-04-01 11:39:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:39:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 150 [2023-04-01 11:39:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:20,093 INFO L225 Difference]: With dead ends: 4603 [2023-04-01 11:39:20,093 INFO L226 Difference]: Without dead ends: 4586 [2023-04-01 11:39:20,095 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 [2023-04-01 11:39:20,097 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 646 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:20,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1914 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:39:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2023-04-01 11:39:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4556. [2023-04-01 11:39:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 3117 states have (on average 1.490856592877767) internal successors, (4647), 3262 states have internal predecessors, (4647), 1002 states have call successors, (1002), 347 states have call predecessors, (1002), 436 states have return successors, (1222), 996 states have call predecessors, (1222), 994 states have call successors, (1222) [2023-04-01 11:39:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 6871 transitions. [2023-04-01 11:39:20,343 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 6871 transitions. Word has length 150 [2023-04-01 11:39:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:20,343 INFO L495 AbstractCegarLoop]: Abstraction has 4556 states and 6871 transitions. [2023-04-01 11:39:20,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-01 11:39:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 6871 transitions. [2023-04-01 11:39:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 11:39:20,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:20,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:20,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 11:39:20,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:20,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:20,347 INFO L85 PathProgramCache]: Analyzing trace with hash -544056936, now seen corresponding path program 1 times [2023-04-01 11:39:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:20,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369346116] [2023-04-01 11:39:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:39:20,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369346116] [2023-04-01 11:39:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369346116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:20,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:20,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 11:39:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529010006] [2023-04-01 11:39:20,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:39:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:39:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:39:20,716 INFO L87 Difference]: Start difference. First operand 4556 states and 6871 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (30), 5 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-01 11:39:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:21,394 INFO L93 Difference]: Finished difference Result 4798 states and 7204 transitions. [2023-04-01 11:39:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:39:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (30), 5 states have call predecessors, (30), 2 states have call successors, (30) Word has length 152 [2023-04-01 11:39:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:21,415 INFO L225 Difference]: With dead ends: 4798 [2023-04-01 11:39:21,416 INFO L226 Difference]: Without dead ends: 4781 [2023-04-01 11:39:21,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:39:21,418 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 629 mSDsluCounter, 3438 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:21,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 4028 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:39:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2023-04-01 11:39:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4695. [2023-04-01 11:39:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 3206 states have (on average 1.4844042420461634) internal successors, (4759), 3351 states have internal predecessors, (4759), 1032 states have call successors, (1032), 367 states have call predecessors, (1032), 456 states have return successors, (1267), 1026 states have call predecessors, (1267), 1024 states have call successors, (1267) [2023-04-01 11:39:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 7058 transitions. [2023-04-01 11:39:21,668 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 7058 transitions. Word has length 152 [2023-04-01 11:39:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:21,669 INFO L495 AbstractCegarLoop]: Abstraction has 4695 states and 7058 transitions. [2023-04-01 11:39:21,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (30), 5 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-01 11:39:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 7058 transitions. [2023-04-01 11:39:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 11:39:21,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:21,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 11:39:21,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:21,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1641625720, now seen corresponding path program 1 times [2023-04-01 11:39:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416034830] [2023-04-01 11:39:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:39:22,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416034830] [2023-04-01 11:39:22,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416034830] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:22,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:22,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 11:39:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700740523] [2023-04-01 11:39:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:22,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:39:22,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:39:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:39:22,617 INFO L87 Difference]: Start difference. First operand 4695 states and 7058 transitions. Second operand has 13 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 6 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34) [2023-04-01 11:39:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:29,628 INFO L93 Difference]: Finished difference Result 15550 states and 24219 transitions. [2023-04-01 11:39:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-04-01 11:39:29,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 6 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34) Word has length 170 [2023-04-01 11:39:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:29,693 INFO L225 Difference]: With dead ends: 15550 [2023-04-01 11:39:29,693 INFO L226 Difference]: Without dead ends: 10609 [2023-04-01 11:39:29,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 11:39:29,717 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 6287 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 13492 mSolverCounterSat, 2839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6335 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 16331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2839 IncrementalHoareTripleChecker+Valid, 13492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:29,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6335 Valid, 1836 Invalid, 16331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2839 Valid, 13492 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 11:39:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2023-04-01 11:39:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 10160. [2023-04-01 11:39:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 6931 states have (on average 1.5090174577982975) internal successors, (10459), 7293 states have internal predecessors, (10459), 2269 states have call successors, (2269), 765 states have call predecessors, (2269), 959 states have return successors, (2881), 2251 states have call predecessors, (2881), 2261 states have call successors, (2881) [2023-04-01 11:39:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 15609 transitions. [2023-04-01 11:39:30,411 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 15609 transitions. Word has length 170 [2023-04-01 11:39:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:30,412 INFO L495 AbstractCegarLoop]: Abstraction has 10160 states and 15609 transitions. [2023-04-01 11:39:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 6 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34) [2023-04-01 11:39:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 15609 transitions. [2023-04-01 11:39:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-01 11:39:30,417 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:30,418 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 11:39:30,418 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:30,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash 547030402, now seen corresponding path program 1 times [2023-04-01 11:39:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:30,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438196260] [2023-04-01 11:39:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:39:30,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438196260] [2023-04-01 11:39:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438196260] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:30,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:30,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:39:30,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301049525] [2023-04-01 11:39:30,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:30,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:39:30,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:30,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:39:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:39:30,859 INFO L87 Difference]: Start difference. First operand 10160 states and 15609 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (33), 6 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 11:39:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:33,644 INFO L93 Difference]: Finished difference Result 28098 states and 43912 transitions. [2023-04-01 11:39:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:39:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (33), 6 states have call predecessors, (33), 3 states have call successors, (33) Word has length 168 [2023-04-01 11:39:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:33,731 INFO L225 Difference]: With dead ends: 28098 [2023-04-01 11:39:33,731 INFO L226 Difference]: Without dead ends: 18583 [2023-04-01 11:39:33,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:39:33,763 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 2008 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2074 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:33,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2074 Valid, 1074 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 11:39:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18583 states. [2023-04-01 11:39:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18583 to 17124. [2023-04-01 11:39:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17124 states, 11601 states have (on average 1.501767089044048) internal successors, (17422), 12289 states have internal predecessors, (17422), 3837 states have call successors, (3837), 1341 states have call predecessors, (3837), 1685 states have return successors, (4943), 3832 states have call predecessors, (4943), 3829 states have call successors, (4943) [2023-04-01 11:39:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17124 states to 17124 states and 26202 transitions. [2023-04-01 11:39:34,862 INFO L78 Accepts]: Start accepts. Automaton has 17124 states and 26202 transitions. Word has length 168 [2023-04-01 11:39:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:34,862 INFO L495 AbstractCegarLoop]: Abstraction has 17124 states and 26202 transitions. [2023-04-01 11:39:34,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (33), 6 states have call predecessors, (33), 3 states have call successors, (33) [2023-04-01 11:39:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 17124 states and 26202 transitions. [2023-04-01 11:39:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 11:39:34,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:34,866 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:34,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 11:39:34,867 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:34,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 906843600, now seen corresponding path program 1 times [2023-04-01 11:39:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:34,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619442055] [2023-04-01 11:39:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 11:39:37,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:37,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619442055] [2023-04-01 11:39:37,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619442055] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:39:37,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709944187] [2023-04-01 11:39:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:37,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:39:37,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:39:37,009 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) [2023-04-01 11:39:37,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:39:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:37,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 3223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 11:39:37,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:39:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 11:39:37,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:39:37,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709944187] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:37,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:39:37,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [28] total 35 [2023-04-01 11:39:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979174239] [2023-04-01 11:39:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:39:37,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:39:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:39:37,686 INFO L87 Difference]: Start difference. First operand 17124 states and 26202 transitions. Second operand has 10 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (34), 5 states have call predecessors, (34), 1 states have call successors, (34) [2023-04-01 11:39:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:38,932 INFO L93 Difference]: Finished difference Result 17271 states and 26413 transitions. [2023-04-01 11:39:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:39:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (34), 5 states have call predecessors, (34), 1 states have call successors, (34) Word has length 173 [2023-04-01 11:39:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:38,979 INFO L225 Difference]: With dead ends: 17271 [2023-04-01 11:39:38,980 INFO L226 Difference]: Without dead ends: 17254 [2023-04-01 11:39:38,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 11:39:38,986 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 10 mSDsluCounter, 4749 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5346 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:38,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 5346 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:39:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2023-04-01 11:39:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 17214. [2023-04-01 11:39:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17214 states, 11661 states have (on average 1.4961838607323557) internal successors, (17447), 12349 states have internal predecessors, (17447), 3837 states have call successors, (3837), 1341 states have call predecessors, (3837), 1715 states have return successors, (4993), 3862 states have call predecessors, (4993), 3829 states have call successors, (4993) [2023-04-01 11:39:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17214 states to 17214 states and 26277 transitions. [2023-04-01 11:39:39,992 INFO L78 Accepts]: Start accepts. Automaton has 17214 states and 26277 transitions. Word has length 173 [2023-04-01 11:39:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:39,992 INFO L495 AbstractCegarLoop]: Abstraction has 17214 states and 26277 transitions. [2023-04-01 11:39:39,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (34), 5 states have call predecessors, (34), 1 states have call successors, (34) [2023-04-01 11:39:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 17214 states and 26277 transitions. [2023-04-01 11:39:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 11:39:39,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:39,997 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:40,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:39:40,209 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,SelfDestructingSolverStorable12 [2023-04-01 11:39:40,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:40,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1250557226, now seen corresponding path program 1 times [2023-04-01 11:39:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:40,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668363011] [2023-04-01 11:39:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 11:39:42,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668363011] [2023-04-01 11:39:42,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668363011] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:39:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753978832] [2023-04-01 11:39:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:42,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:39:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:39:42,282 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) [2023-04-01 11:39:42,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:39:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:42,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 11:39:42,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:39:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:39:43,409 INFO L327 TraceCheckSpWp]: Computing backward predicates...